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MCH(W)(S) - Amalgamated Pumping Supplies

1. el AQ IN 5 Sn 5 SS S 2 SS n 7 AN 533 1 KGSSSSSSSN E E 2 2 ae SSN ANS 5 SSSA sd S 2 74 AA Z 5 U 7 5 1 YZ e 22 77777 e Y 3 2 lt 2722 Ka ea A 2 Yj 4A A figure 31 MCH 12 5 MCH 14a b MCH 16 0 76 Parts list 12 5 14a b 16 see figure 31 description Rem quantity bearing housing cast iron bronze impeller sounson PUMP cast iron pump casing cast iron bronze throttling bush bronze external circlip alloyed steel filling ring steel bearing cover steel bearing cover steel PO BY Po P gland cast iron bronze 4 gland packing ring key alloyed steel ball bearing external circlip steel internal circlip steel V
2. 7 gt B dA EA mm p J n 22222 E 5 7 aee NES 5 4 1 1 eS E SAN NN NON T Mj SSS 7 1 N Y gt 7 poo i 5 KZ 272 ES Te QS 4 3 Ies S NIO 2 tes 2 i 7 E 2 figure 33 MCHS 12 5 14a b 16 MCH EN D 80 Parts list sounson PUMP MCHS 16 MCHS 14a b MCHS 12 5 cast iron bronze see figure 33 impeller Rem quantity description bearing housing cast iron pump casing cast iron bronze m cover for mechanical seal cast iron bronze throttling bush bronze set ring alloyed steel external circlip alloyed steel filling ring steel bearing cover steel bearing cover steel packing ring mechanical seal mechanical seal key alloyed steel ball bearing external circlip s
3. figure 30 MCH S 10 MCH EN D Parts list 71 B HNSON PUMP MCH 10 x 2 9 item no quantity description inlet casing material cast iron see figure 30 remarks outlet casing cast iron lantern piece cast iron plug steel slide bearing bronze PTFE set ring bronze splash ring rubber bearing cover steel external circlip steel internal circlip steel filling ring steel key steel nut steel adjustment screw alloyed steel gland packing ring gland cast iron gland stud alloyed steel nut brass plug steel stage casing cast iron for 2 stage and 8 stage design n 1 impeller noryl ball bearing for 9 stage design 2 external circlip alloyed steel 1 1 1 2 1 1 2 2 1 1 1 1 4 2 7 1 2 2 1 n n 1 1 1 support ring bronze 2 gt packing ring for 2 stage and 8 stage design n 2 stud alloyed steel shaft alloyed steel key alloyed steel coupling half pump side cast iron coupling half motor side cast iron flange motor bolt nut steel support steel bolt
4. to max 146 big 20 4 i II figure 26 Dimensions sketch unit MCH W S 145 0 Weight and dimensions 61 MW PUMP v Pump with heavy bearing construction D 62 Weight and dimensions M B SON PUMP MCH 8 10 Dimensions of unit MCH W S 16 poches to mox DIN 2535 ND 4 169 pe 3 65 cp BC lt _ 51 5 fa Y fc zl fe ___ fd _ figure 27 MCH W S Dimensions sketch unit MCH W S 16 MCH EN 0 Weight and dimensions 63 MW PUMP 0 64 Weight and dimensions MCH B sounson PUMP 8 11 Dimensions of
5. 0750 a AS 2 NN WERDE MCH 14a b with heavy bearing construction E V S mna n CC 3 2 i ENE NSS XX ea SSS 5 4 2 P 2 ox 8 82 Parts list 0 14a b heavy bearing construction see figure 34 description quantity bearing housing sounson PUMP cast iron bronze impeller cast iron bearing housing cast iron pump casing cast iron bronze throttling bush bronze spacer sleeve steel bearing cover steel external circlip alloyed steel filling ring steel bearing cover steel bearing cover steel po gland cast iron bronze gland packing ring waved ring alloyed steel key alloyed steel ball bearing ball bearing external circlip steel internal circlip steel V ring rubber plug steel seali
6. 0 52 Weight and dimensions MCH B sounson PUMP 8 3 Dimensions MCH S 12 5 figure 20 Dimensions sketch MCH W S 12 5 leakage water drain pressure gauge connection drain plug MCH MCHW MCHS 12 5 x1 12 5 x2 12 5x3 12 5x4 12 5x5 12 5 x6 12 5 x7 12 5 x8 12 5 x9 12 5 x 10 0 Weight and dimensions 53 M PUMP a 8 4 Dimensions MCH S 14a b figure 21 Dimensions sketch MCH W S 14a b leakage water drain pressure gauge connection drain plug MCH MCHW MCHS 14a b x 1 14a b x 2 14a b x 3 14a b x 4 14a b 5 14a b x 6 14a b x 7 14a b x 8 14a b x9 14a b x 10 Pump with heavy bearing construction 0 54 Weight and dimensions MCH B sou
7. he E CN an OU d ES N HA IN Sel 10 6 6 iene file 23 ML V N N N OU acm AVI E N C 4 Tu LX lt TUM V de i V 2 25 lt a ES 8 lt 10 X MX V N X X 7 i 1 4 LE K u 10 c N N 0 7 2 0 7 7 5 DS E 1 4 lo T A b zi __ ERES 2 gt 13 Ssh Buc NN ed i aud 5 PU I NI m ae 29 6 4 j x 2j as i2 E SL 4 2 12 FK M se oN Ss l2 13 ES M T lt MI lt LH 2 19 4 Tx Ee Js n 3 EE I 1 E lu 4 2 S AN 5S M MA M 2 Te 4 T U ey Q 7 Q 7 12 0 24 3 42 6 9 a 24 3 4 figure 41 Survey curves 1500 min 1 98 Technical data MCH EN 0 MCH B sounson PUMP 10 3 3 Overview graphics 3600 min Im 400 375 E 350 325 300 H 275 H E zx E 3 250
8. o M 5 N o 5 St A M MN 4 22 di ig 8 SSS SAG Sese Wy 4 a 2 4 2 G AMD figure 39 MCHS 20 a b 10 N N M N o Nay ol N 92 Parts list MCH EN D 20a b see figure 39 item no quantity component bearing housing B JOHNSON PUMP material cast iron pump casing cast iron cover for mech seal cast iron throttling bush bronze throttling ring alloyed steel external circlip alloyed steel bearing cover steel bearing cover steel filling ring steel packing ring mechanical seal mechanical seal key alloyed steel ball bearing ball bearing external circlip steel internal circlip steel V ring rubber plug steel sealing ring copper tap bolt steel adjustment screw alloyed steel pipe union brass plug steel
9. 0670 SONUS B i Pt 2o e y eed Yj NSSS NSSSSSSSI lt Wi NRG 8 NS 1 eS SS J e N N n figure 35 MCHW 14a b with heavy bearing construction 3 Ol o o CN 84 Parts list 0 MCHW 14a b with heavy bearing construction see figure 35 quantity description bearing housing B JOHNSON PUMP cast iron bronze impeller cast iron bearing housing cast iron pump casing cast iron bronze cooling water cover cast iron throttling bush bronze spacer sleeve steel bearing cover steel external circlip alloyed steel filling ring steel bearing cover steel bearing cover steel gland cast iron bronze gland packing ring waved ring alloyed steel packing ring key alloyed steel ball bearing ball bearing external circlip steel internal circlip steel V ring rubber plug sealing ring
10. ta max DIN 2535 ND 4 L 146 L 20 1 8 AH E Sol Q a fo 1 Ee in alk Fol figure 24 Dimensions sketch unit MCH W S 12 5 MCH EN D Weight and dimensions 57 MW PUMP 0 58 Weight and dimensions B sounson PUMP 8 8 Dimensions of unit MCH W S 14a to max 146 big 20 4 i L II Fol FQ figure 25 Dimensions sketch unit MCH W S 14a b 0 Weight and dimensions 59 MW PUMP v Pump with heavy bearing construction D 60 Weight and dimensions B sounson PUMP 8 9 Dimensions of unit MCH W S 14b
11. A support steel 0 Parts list 73 B JOHNSON PUMP MCHS 10 x 2 9 see figure 30 item no quantity description inlet casing material cast iron remarks outlet casing cast iron lantern piece cast iron plug steel slide bearing bronze PTFE set ring bronze splash ring rubber bearing cover steel external circlip steel internal circlip steel filling ring steel key steel nut steel lock screw alloyed steel mechanical seal plug steel stage cover cast iron for 2 and 8 stage design n 1 impeller noryl ball bearing for 9 stage design 2 external circlip alloyed steel 5 5 A DNI m support ring bronze 2 gt packing ring for 2 and 8 stage design n 2 stud alloyed steel shaft alloyed steel key alloyed steel coupling half pump side cast iron coupling half motor side cast iron flange motor bolt nut steel support steel bolt steel nut steel ow 02 BR A support steel 74 Parts list 0 B sounson PUMP MCHS 10 x 11 16 see figure 30 item no quantity description inlet
12. 2 74 2 4 2 20 a b figure 37 MCH EN D Parts list 88 20 a b see figure 37 item no quantity component bearing housing B JOHNSON PUMP material cast iron pump casing cast iron throttling bush bronze throttling ring alloyed steel external circlip alloyed steel bearing cover steel bearing cover steel filling ring steel m wo gland cast iron 4 gland packing ring key alloyed steel ball bearing ball bearing external circlip steel internal circlip steel V ring rubber plug steel sealing ring copper stud alloyed steel nut brass tap bolt steel plug steel 1 1 1 4 2 3 6 6 4 4 8 2 1 suction cover cast iron 2 stage casing cast iron impeller cast iron bronze shaft alloyed steel wear ring bronze wear ring bronze wear ring bronze packing ring balance pipe copper only for MCH 20a b x 2 to 6 key alloyed steel stud alloyed steel 5 stud alloyed steel 4 nut steel plug steel only for MCH 20a b x 1 sealing ring copper only for MCH 20a b x 1 angle pipe union brass only for
13. 2 4103EN 0 1 1 10 P kw 100 figure 44 Noise as a function of pump power at 1500 min dB A 100 4104EN 96 90 85 80 75 7O 66 60 1 10 100 P kW figure 45 Noise as a function of pump power at 3000 min MCH EN D 102 Technical data B sounson PUMP 10 8 2 Noise L dB 4102 3 0 2 8 2 6 2 4 2 2 2 0 1 8 1 6 1 4 1 2 1 0 0 8 0 6 0 4 0 2 0 0 O 12 8 4 5 6 7 8 9 10 11 12 18 14 15 16 17 18 19 20 IL1 L2 dB figure 46 Noise graph To determine the noise level of the entire set the noise level of the motor must be added to the noise level of the pump This can simply be done by means of the graph printed above Determine the noise level of the pump L1 see graph and the motor L2 Calculate the absolute difference between both levels L1 12 Find this value on the X axis Go straight up to the curve Go left to the Y axis Read the value on this Y axis Add this value to the highest noise level L1 or L2 NO WD Example 1 Pump 75 dB motor
14. 15 LU JU 0 JU Oi LN MCH 12 5 figure 43 MCH 14a Survey curves 1800 min 100 Technical data MCH EN D B sounson PUMP 10 4 Torques settings Screwthread Torque Nm Material A2 A4 10 5 Tie rod torque Pump type Torque Nm Screwthread Material 40 54 89 118 99 133 40CrMo4 200 267 137 183 10 6 Post greasing of ball bearings See the table below for bearings that require post greasing and the appropriate type of grease Post grease with one of the following types Bearings of grease classification acc to NLGI 2 MCH S 14 a b suction side BP Energrease LS2 Gulf Crown Grease nr 2 with reinforced bearin Chevron Polyurea EP Grease 2 Mobil Mobilux bearing g EP2 Esso Beacon 2 Shell Alvania R2 Fina Marson L2 Total Multis EP22 Texaco Multifak MCH S 16 all bearings EP2 SKF Alfalub LGMT 3 SKF Alfalub LGHT 3 or a similar type of grease MCHW all types all bearings suitable for temperatures upto 150 C 10 7 Recommended liquid locking agents slide bearing MCH S 10 Loctite 270 Studlock throttling bush Loctite 270 Studlock wear rings Loctite 270 Studlock 0 Technical data 101 a SON PUMP 10 8 Noise data 10 8 1 Noise as a function of pump power The following data are based on normal use of the pump driven by an electric motor
15. Assembling the bearing construction on the suction side 1 Fit the rubber V ring 0250 over the pump shaft with the narrow opening pointing to the inside of the pump 2 Fit the bearing cover 0120 to the inside of the small bearing housing 0010 Fix the bearing housing 0010 to the pressure bracket using the bolts 0300 4 Fit the external circlip 0230 into the inner of the 2 grooves on the pump shaft and fit a filling ring 0110 5 For MCHW only Grease the bearing on both sides with ball bearing grease For the correct type of grease see paragraph 10 6 6 Fit the bearing 0210 using a suitable mounting bush which rests on both the inner and outer rings of the bearing 7 Fit the second filling ring 0110 and fit the external circlip 0230 onto the pump shaft 8 Fitthe outer bearing cover 0130 9 Fit the by pass pipe 0670 if present 0 Disassembly and assembly 45 PUMP a SON PU 7 11 AN 7 11 1 7 11 2 7 11 3 7 11 4 Disassembling the MCH W S 20a b Make sure that the power supply to the pump is switched off and that no one can switch the pump on again unintentionally If there is no illustration with the instruction the item numbers used relate to the illustrations in the parts list for this pump in chapter 9 Replacing the gland packing MCH MCHW If the pump has to be further dismantled then replacement of the packing rings will be easier if the
16. Instruction manual MCH W S Horizontal multistage pump bal JOHNSON PUMP EC Declaration of conformity Directive 98 37 EC appendix II A Manufacturer Johnson Pump Water B V Dr A F Philipsweg 51 P O Box 9 9400 AA Assen Netherlands hereby declares that the pump in case it is delivered as an assembly with drive last position of serial number A is in conformity with the provisions of Directive 98 37 EC as altered most recently and the following directives and standards EC directive 73 23 EEC Electric equipment for use within certain voltage limits e standards EN 292 part 1 amp 2 EN 809 The pump to which this declaration refers may only be put into operation after it has been installed in the way prescribed by the manufacturer and as the case may be after the complete system of which this pump forms part has been made to fulfil the requirements of Directive 98 37 EC as altered most recently Manufacturer s declaration Directive 98 37 EC appendix II B Manufacturer Johnson Pump Water B V Dr A F Philipsweg 51 P O Box 9 9400 AA Assen Netherlands hereby declares that the pump in case it is delivered without drive last position of serial number B is in conformity with the following standards EN 292 parts 1 amp 2 EN 809 and that this pump is meant to be incorporated in or combined with another machine electric motor combustion engine and may only be put into
17. D Disassembly and assembly 49 a SON PUMP 7 12 8 8 9 For MCHW only Grease the bearings on both sides with ball bearing grease For the correct type of grease see paragraph 10 6 Fit the bearing 0280 over the pump shaft and into the seat of the bearing housing using a suitable assembly bush which rests on both the inner and outer rings of the bearing Fit the other filling ring 0160 and external circlip 0290 to the pump shaft Fit the internal circlip 0300 into the bearing housing 10 Fit the outermost bearing cover 0140 and the rubber V ring 0310 with the narrow opening pointing to the outside of the pump 0140 0420 44 O figure 18 Assembly of the double row ball bearing Assembling the stage set 1 NO Fit the sub assembly which you have just assembled with the shaft vertically drive side down Use a support for this with an opening to provide space for the shaft end Fit the packing ring 0600 and fit a stage casing 0510 on the pressure bracket Fit a key 0660 in the pump shaft and fit an impeller 0520 the inlet opening of the impeller must point up Repeat steps 2 and 3 until the last impeller has been fitted Secure the impeller set by fitting an external circlip 0130 to the pump shaft Fit a packing ring 0600 and place the suction cover 0500 on the stage set Fit a packing ring 0600 into the inlet casing using assemb
18. steel nut steel l oj BR om support steel 72 Parts list D 10 x 11 16 see figure 30 item no quantity description inlet casing B sounson PUMP material cast iron remarks outlet casing cast iron lantern piece cast iron plug steel slide bearing bronze PTFE set ring bronze splash ring rubber bearing cover steel external circlip steel internal circlip steel filling ring steel key steel nut steel adjustment screw alloyed steel gland packing ring gland cast iron gland stud alloyed steel nut brass 1 1 1 2 1 1 2 2 1 1 1 1 4 2 7 1 2 2 1 plug steel 2 gt stage casing cast iron for 11 stage n 2 2 impeller noryl ball bearing external circlip alloyed steel support ring bronze 2 packing ring for 11 stages n 3 stud alloyed steel shaft alloyed steel key alloyed steel key alloyed steel key alloyed steel only for 16 stage design coupling half pump side cast iron coupling half motor side cast iron flange motor bolt nut steel support steel bolt steel nut steel A
19. 0550 and remove the key 0260 Only for MCHS Slacken the balance pipe 0620 Place the pump vertically in a support with the shaft end up Remove the rubber V ring 0310 and the bearing cover 0140 Slide the inner rubber V ring over the shaft and slacken the inner bearing cover 0140 This is now free from the pump shaft 6 Remove the outer external circlip 0290 and the filling ring 0160 from the pump shaft 7 Slacken the bolts 0360 and pull the bearing housing 0010 vertically from the pump section The bearing will be pulled from the pump shaft 8 Remove the lower external circlip 0290 and the filling ring 0090 from the pump shaft 9 Remove the bearing cover and the rubber V ring from the pump shaft 10 Only for MCH Disassemble the gland 0170 aR WO I 46 MCH EN D Disassembly and assembly B sounson PUMP 11 Only for MCHW Disassemble the cooling water cover 0030 together with the gland 0170 7 11 5 Disassembly of the ball bearing 1 Remove both internal circlips 0300 from the bearing bracket 2 Using a suitable bush which rests on the outer ring of the bearing press the bearing 0280 out of the bearing bracket 7 11 6 Disassembling the mechanical seal MCHS 1 Remove the seal cover 0040 from the pump shaft and remove the static ring from the mechanical seal 2 Slide the rotating ring for the mechanical seal 0230 off the pump shaft If the reason for disassembly was to re
20. 2 2 2 1 1 2 3 1 4 2 1 1 1 1 1 4 2 3 6 6 8 2 2 2 1 suction cover cast iron stage casing cast iron impeller cast iron bronze shaft alloyed steel wear ring bronze wear ring bronze wear ring bronze packing ring balance pipe copper key alloyed steel stud alloyed steel stud alloyed steel nut steel washer stainless steel MCH EN 0 Parts list 93 H PUMP 0 94 Parts list 10 Technical data 10 1 Maximum r p m M B SON PUMP MCHS nmax min 10x2 12 3600 10 14 16 12 5 1 10 3000 3600 12 5 x 11 12 14ax1 7 3000 14ax8 10 14a x 11 12 14b x 1 7 14b x 8 10 14b x 11 12 16x1 7 16x8 10 20ax1 3 20ax4 20ax5 6 20bx1 2 20b x 3 20b x4 6 MCH EN 0 Technical data 95 M PUMP a 10 2 Permissible pressure and temperature MCH W S max capacity m h max head m max inlet pressure bar 10 test pressure bar 1 5 x working pressure min test pressure bar 15 1 5x working pressure max test pressure bar 10 1 9 impellers 25 11 16 impellers max permitted working pressure bar 40 3x inlet pressure t
21. 20a b x 2 to 6 NI washer stainless steel MCH EN D Parts list 89 B SON PUMP 9 11 figure 38 0570 MCHW 20A B 0260 zn n 0 0550 0320 DOGONNN XO NS SR T gt 3 226 353 NN SNC SSSR Nos Sf SSNs Jis S WH PA xe i Q bel ca 5 R gt 7 LY Ae N a O S gt 2 553 7 f R amp S o S v ES 6 1 7 L amp E 4 MCHW 20 a b 90 Parts list 0 MCH B sounson PUMP MCHW 20 a b see figure 38 item no quantity component material bearing housing cast iron pump casing cast iron cooling water cover cast iron throttling bush bronze throttling ring alloyed steel external circlip alloyed steel bearing cove
22. 254 0 2 532 748 MALAYSIA Johnson Pump M Sdn Bhd Tel 60 0 3 943 2300 Fax 60 0 3 943 6300 SOUTH AFRICA Southern Pumps S A Pty Ltd Tel 27 0 21 551 24 90 Fax 27 0 21 551 30 88 TANZANIA Johnson Pump Tanzania Ltd Tel 255 0 51 865 776 Fax 255 0 51 865 775 ZIMBABWE Johnson Pump Zimbabwe Pvt Ltd Tel 263 0 4 611 681 Fax 4263 0 4 611 680 JOHNSON PUMP Johnson Pump Water B V Business Units BELGIUM Johnson Pump Brussels N V Tel 32 0 2 422 15 15 Fax 432 0 2 422 15 01 INDIA Johnson Pump India Ltd Tel 91 0 79 287 03 11 Fax 491 0 79 287 25 22 NETHERLANDS Johnson Pump Water B V Tel 31 0 592 37 67 67 Fax 431 0 592 37 67 60 SWEDEN Johnson Pump Marine Tel 46 0 19 21 83 00 Fax 46 0 19 27 23 72 USA Johnson Pumps of America Inc Tel 1 847 671 7867 Fax 1 847 671 7909 ISO 9001 Dr Philipsweg 51 Box 9 9400 AA Assen The Netherlands Tel 31 0 592 37 67 67 Fax 31 0 592 37 67 60 E mail info nljohnson pump com
23. MCHS 14axn 5 14bxn 5 mm MCHS 16 6 5 V N N NN figure 13 Distance mh Steps 9 and 10 of paragraph 7 8 7 replaced by Fit the closed bearing cover 0110 10 Fit the by pass pipe 0670 if present 40 MCH EN D Disassembly and assembly 7 9 1 7 9 2 7 9 3 7 9 4 M PUMP a SON PU Disassembling MCH W S 14a b heavy bearing construction Make sure that the power supply to the pump is switched off and that no one can switch the pump on again unintentionally If there is no illustration with the instruction the item numbers used relate to the illustrations in the parts list for this pump in chapter 9 Replacing the gland packing MCH MCHW If the pump has to be dismantled further then replacement of the packing rings will be easier if the bearing housings 0020 and 0010 have been removed If only the packing rings have to be replaced then the pump does not need to be disconnected from the pipe work and it can remain on the foundation Proceed as follows this applies for both sides of the pump 1 Remove the gland nuts 0280 and pull the gland 0140 backwards 2 Remove the packing rings 0160 from the gland Use the special packing puller for this see figure 6 3 Clean the gland and then grease it with graphite grease or silicone grease Also grease the new packing rings 4 Bend open the first packing ring as
24. This manual contains instructions for working safely with the pump Operators and maintenance staff must be familiar with these instructions Below is a list of the symbols used for those instructions and their meaning Personal danger for the user Strict and prompt observance of the corresponding instruction is imperative Risk of damage or poor operation of the pump Follow the corresponding instruction to avoid this risk Useful instruction or tip for the user Items which require extra attention are shown in bold print This manual has been compiled by Johnson Pump with the utmost care Nevertheless Johnson Pump cannot guarantee the completeness of this information and therefore assumes no liability for possible deficiencies in this manual The buyer user shall at all times be responsible for testing the information and for taking any additional and or deviating safety measures Johnson Pump reserves the right to change safety instructions MCH EN D Introduction 9 PUMP a SON PU 1 3 1 4 1 4 1 1 4 2 1 5 Guarantee Johnson Pump shall not be bound to any guarantee other than the guarantee accepted by Johnson Pump In particular Johnson Pump will not assume any liability for explicit and or implicit guarantees such as but not limited to the marketability and or suitability of the products supplied The guarantee will be cancelled immediately and legally if e service and or maintenance is no
25. copper gland stud alloyed steel nut brass tap bolt steel tap bolt steel grease nipple steel O ring rubber angle pipe union brass tap bolt steel suction cover cast iron bronze stage casing cast iron bronze impeller cast iron bronze shaft alloyed steel 5 5 5 la 5 5 wear ring bronze 5 T E wear ring bronze throttling ring alloyed steel 5 wear ring bronze packing ring pipe copper by pass pipe copper key alloyed steel stud alloyed steel nut steel washer stainless steel angle pipe union brass 0 Parts list 85 B SON PUMP 9 9 MCHS 14a b with heavy bearing construction 5 4 0260 0270 Fees 7 T 3 b 4 f Y 2 LN hel N 2 7 e
26. e c 10 Q ES k e o 19 e 8 N N figure 36 H N N E H Z e H e Wires D jA T Pi pic AA 9 I 47 4 268i Ln 7 2 Hyg T T 1 7 x 4 rel Del o SE o 7 2 NEY SSS EL T E 5 5 e EN MCHS 14a b with heavy bearing construction 86 Parts list 0 sounson PUMP MCHS 14a b with heavy bearing construction cast iron see figure 36 bronze impeller no quantity description bearing housing cast iron bearing housing cast iron pump casing cast iron bronze cover for mechanical seal cast iron bronze throttling bush bronze spacer sleeve steel bearing cover steel set ring alloyed steel external circlip alloyed steel filling ring steel bearing cover steel bearing cover steel packing ring mechanical seal mechanical seal waved ring alloyed steel key alloyed steel ball bearing ball bearing external circlip steel internal circlip steel 1 2 2 1 1 1 2 2 4 2 1
27. however it should never be allowed to run dry If there are no problems it is not advisable to dismantle Because the facing surfaces are running in on one another dismantling always means replacement of the seal When the seal is leaking it has to be replaced Environmental influences e Regularly clean the filter in the suction pipe or the suction strainer at the bottom of the suction pipe because the inlet pressure may become too low if the filter or the suction strainer is blocked e Ifthe unit is out of operation and there is the danger that the pumped liquid will expand as a result of solidifying or freezing it should be drained and if neccessary be flushed e Ifthe pump is to be put out of operation for a longer period it should be treated with a preserving agent and periodical the pump shaft has to be turned several times Noise If after some time the pump starts making a noise this may indicate that something is wrong with the pump A crackling noise in the pump may indicate cavitation or excessive motor noise can be an indication of decreasing bearing quality MCH EN D Maintenance 25 B sounson PUMP 5 4 Lubrification of the bearings The necessity for post greasing the ball bearings depends upon the bearing type being applied See the table below for bearings that require post greasing The recommended lubricating schedule is as follows MCH S 10 Bearings all bearings Lubricate after n
28. steel internal circlip steel V ring rubber plug steel sealing ring copper gland stud alloyed steel nut brass tap bolt steel O ring rubber angle pipe union brass suction cover cast iron bronze stage casing cast iron bronze quantity 1 for 1 stage design impeller cast iron bronze shaft alloyed steel 2 1 2 4 2 3 6 6 4 4 8 2 4 1 n n 1 n wear ring bronze 7 wear ring bronze gt throttling sleeve alloyed steel only for MCH12 5 x 8 10 14a b x 4 10 and MCH16 x 5 10 2 wear ring bronze packing ring quantity n 3 for 1 stage design pipe copper balance pipe copper oniy for MOIES eu 10 14 x 4 10 16 3 10 key alloyed steel tie rod alloyed steel not for MCH14a b x 4 nut steel not for MCHW14a b x 4 washer stainless steel angle pipe union brass only for MCHW12 5 x 5 10 MCHW14a bx 4 10 and MCHW16 x 3 10 bolt with nut steel only for MCHW14a b x 4 plug steel only MCHW12 5 x MCHW14aj b x 1 3 iG x1 2 MP Py BR sealing ring copper only To MCHW12 5 x MCHWh14a b x 1 3 MCHW16 x 1 2 0 Parts list 79 BH SON PUMP 9 6 MCHS 12 5 14a b 16
29. 1 Disassembly of the lantern piece 30 7 4 2 Disassembling the ball bearings 30 7 4 8 Disassembling the gland packing 30 7 4 4 Disassembling the mechanical seal 31 7 4 5 Disassembly of the pump stage 31 7 5 Assembly MCH S 10 32 7 5 1 Preparation for assembly 32 7 5 2 Pump assembly 32 7 5 3 Assembling the mechanical seal MCHS 33 7 5 4 Assembling the gland packing MCH 33 7 5 5 Assembling the bearing construction 34 7 6 Fitting the electric motor MCH S 10 34 7 7 Disassembling the MCH W S 12 5 14a b 16 35 7 7 1 Replacing the gland packing MCH MCHW 35 7 7 2 Replacing the mechanical seal MCHS 35 7 7 3 Disassembling the pump 35 7 7 4 Disassembling the bearing housing on the drive side 35 7 7 5 Disassembly of the ball bearing 36 7 7 6 Disassembling the mechanical seal MCHS 36 7 7 7 Disassembling the set of stage casings 36 7 7 8 Disassembling the bearing housing on the suction side 36 7 7 9 Disassembling the ball bearing on the suction side 36 7 7 10 Disassembling the mechanical seal on the MCHS suction side 36 7 8 Assembly 37 7 8 1 Preparation for assembly 37 7 8 2 Sub assembly of stage casings 37 7 8 3 Pump assembly 37 7 8 4 Assembling the gland packing MCH 38 7 8 5 Assemble the water cooled gland packing MCHW 38 7 8 6 Assembling the mechanical seal MCHS 38 7 8 7 Assembling the bearing construction 39 7 8 8 Assembling the stage set 40 7 9 Disassembling MCH W S 14a b heavy bearing construction 41 7 9 1 Replacing the gland packing MCH MCHW 41 7 9
30. 2 1 1 1 1 1 2 4 1 3 V ring rubber plug EM sealing ring copper tap bolt steel tap bolt steel grease nipple steel adjustment screw alloyed steel pipe union brass tap bolt steel suction cover cast iron bronze stage casing cast iron bronze impeller cast iron bronze shaft alloyed steel 5 5 5 wo AJ A wear ring bronze 7 wear ring bronze gt throttling ring alloyed steel 2 wear ring bronze packing ring by pass pipe copper key alloyed steel stud alloyed steel nut steel washer stainless steel 0 Parts list 87 sounson PUMP MCH 20a b 9 10 ur ax 0840 2 A M dh 22 2224 FASS P 353 P LLL AA Ds Cee M e Hy NNNNNNSC SS AR 2 Lif 2 LLL 274 Y SSNS SS
31. 20a b Preparation for assembly For the correct torque settings see paragraphs 10 4 and 10 5 For the correct lubricants and locking agents see paragraphs 10 6 and 10 7 For assembly all relevant parts should always be clean and undamaged Leave bearings and seals for as long as possible in the packing If the bearings does not need to be replaced for pumptype MCHW the bearings and the bearing housings will have to be cleaned and provided with new grease Sub assembly of stage casings _ y 71 0560 lt gt 2 Gla 2 4273 SS figure 16 Fitting the wear rings Use a suitable assembly bush for inserting the wear rings The flat side of the wear rings must be positioned equally with the flat side of the cover see figure 16 1 Fit the small wear rings 0580 into the covers 0510 2 Fita wear ring 0560 into the suction cover 0500 3 Fit the wear rings 0560 and 0570 into the covers 0510 The wear rings 0560 and 0580 are NOT fitted for the cover which is directly behind the pressure bracket 0020 on the drive side Wear ring 0560 is not fitted because there is no impeller on that side of the cover The throttling bush 0100 which is fitted into the pressure bracket is fitted into the edge for the wear ring 0580 Pump assembly 1 Place a little Loctite 270 Studlock on the fitting face of the throttling bush 0100 an
32. 5 225 200 4 Nm 75 c Mma Dun 5 En Ae 5 3U ie 2 2 s LLL 12 3 25 9 E EN 7 LET 00 EE ELE T 1 75 F E 55 12 H L2 50 TL i F7 25 a 0 45 2 j 4 5678 4 5 20 30 40 50 607080 100 Q MCH 10 MCH tha 125 b 46 20a 205 1 figure 42 Survey curves 3600 MCH EN D Technical data 99 a SON PUMP mi 10 3 4 Overview graphics 1800 min E FAY 6 gt lt ABS 12 x ze AP UE p M N 6 6 ac 6 29 E N 2 Se 88 7 aw 90 1 z X z Y Y s 4 um acm N 5 M 8 em 4 10 ivi 3 M X X A 3 JN 77 Ld NH XN A N DA 7 0 c V 15 d INS T 1 4 O4 5 x E 8 NS DES EN 4 7 2 N 20 5 OD KT N 2 G lis X lt J IE 9 MIO j 13 8 Mi S T b L 8 Sia 0 S ini N N i T ML gt 12 SURE 2 EL 47 d t HENS 3 E w 3 N XE RC 2 3 5 2 Lot E rE 3 ER T 7 3 2 16 p E es IN 4 1 a U 5 1A f a LN A xt Z
33. Apply pressure or tension during assembly via the rear end of the spring only The sliding surface must face towards the shaft end drive side Wet the seal chamber with some low surface tension water add detergent and fit the static ring of the mechanical seal 0140 into the seal cover 0030 with the sliding surface pointing out Fit the packing 0120 en fit the cover 0030 into the pressure bracket Proceed with point 7 8 7 Assembling the bearing construction See figure 12 1 8 9 Fit the bearing cover 0100 to the inside of the bearing housing for the drive side this is the part which has the arrow for the direction of rotation Fit an internal circlip 0230 into the inner groove in the bearing housing Fix this bearing housing 0010 to the pressure bracket using the bolts 0290 Fit the rubber V ring 0240 over the pump shaft with the narrow opening pointing to the inside of the pump Fit the external circlip 0220 into the rear of the 2 grooves on the pump shaft and fit the filling ring 0090 Grease the bearing on both sides with ball bearing grease For the correct type of grease see paragraph 10 6 Fit the bearing 0210 over the pump shaft and into the seat of the bearing housing using a suitable assembly bush which rests on both the inner and outer rings of the bearing Fit the other filling ring 0090 and external circlip 0220 to the pump shaft Fit the internal circlip 0230 into the be
34. Remove the lower external circlip 0230 and the filling ring 0110 from the pump shaft 9 Remove the bearing cover and the rubber V ring from the pump shaft 10 Only for MCH Disassemble the gland 0140 aR Inm 0 Disassembly and assembly 41 a SON PUMP 7 9 5 7 9 6 7 9 7 7 9 8 7 9 9 7 9 10 7 10 7 10 1 11 Only for MCHW Disassemble the cooling water cover 0040 together with the gland 0140 Disassembling the ball bearings 1 Remove both internal circlips 0240 from the bearing bracket 2 Using a suitable bush resting on the outer ring of the bearing press the bearings out of the bearing bracket Disassembling the mechanical seal MCHS 1 Remove the seal cover 0040 from the pump shaft and remove the static ring from the mechanical seal 2 Slide the rotating ring for the mechanical seal 0160 off the pump shaft If the reason for disassembly was to replace the mechanical seal the new mechanical seal can now be fitted See from point 7 10 6 for this Disassembling the set of stage casings 1 Uncouple the balance pipe 0670 if fitted 2 Only for MCHS Slacken the adjustment screw 0330 and remove the set ring 0090 3 Unscrew the nuts 0750 from the tie rods 0740 4 Remove the pump casing 0030 from the stage set Using a suitable bush press or tap the throttling bush 0060 out of the inlet casing 5 Remove the external circlip 0100 and any throttli
35. Tel 32 0 2 422 15 50 Fax 432 0 2 422 15 59 the Netherlands Tel 31 0 592 34 28 33 Fax 31 0 592 40 93 51 DENMARK Johnson Pumper A S Tel 45 43 52 24 00 Fax 45 43 52 15 77 FINLAND Johnson Pump Oy Tel 358 0 9 348 3800 Fax 4358 0 9 348 38495 FRANCE Johnson Pompes Tel 33 0 1 39 20 50 00 Fax 33 0 1 39 56 54 22 GERMANY Johnson Pumpen GmbH Tel 49 0 5731 480 80 Fax 449 0 5731 414 00 Sales Office Essen Tel 49 0 201 23 70 66 ITALY Johnson Pump Italiana S r l Tel 39 039 604 14 63 Fax 39 039 604 90 97 NETHERLANDS Centrifugal Pumps Positive Displacement Pumps contact Belgium Johnson Pump Nederland Tel 31 0 592 37 67 67 Fax 31 0 592 37 67 60 Johnson Pump Horticulture Tel 31 0 174 51 84 10 Fax 431 0 174 51 84 44 NORWAY Johnson Pump A S Tel 47 22 74 08 40 Fax 47 22 28 03 30 SPAIN Johnson Pump S L Tel 34 972 58 08 01 Fax 34 972 58 08 03 Sales Office Madrid Tel 34 91 328 30 40 SWEDEN Johnson Pump Svenska Tel 46 0 19 21 83 70 Fax 46 0 19 27 23 18 www johnson pump com SWITZERLAND Johnson Pumpen AG Tel 41 0 1 780 90 92 Fax 41 0 1 780 38 32 UNITED KINGDOM JP Pumps Ltd Tel 44 0 1293 55 34 95 Fax 44 0 1293 52 46 35 Northern Regional Office Bradford Tel 44 0 1274 74 22 47 Fax 44 0 1274 74 22 28 Joint Ventures KENYA Johnson Pump Kenya Ltd Tel 254 0 2 556 751 Fax
36. bearing housings 0010 are removed If only the packing rings have to be replaced then the pump does not need to be disconnected from the pipe work and it can remain on the foundation Proceed as follows this applies for both sides of the pump 1 Remove the gland nuts 0350 and pull the gland 0170 backwards 2 Remove the packing rings 0190 from the gland Use the special packing puller for this see figure 6 3 Clean the gland and then grease it with graphite grease or silicone grease Also grease the new packing rings 4 Bend open the first packing ring as shown in figure 7 and fit it around the shaft Thoroughly press the ring home using a suitable piece of halved tube 5 Fitthe other rings Press these well home one by one Ensure that the cuts are at 90 with regard to each other 6 Press the gland against the last packing ring and tighten the gland nuts one by one by hand Replacing the mechanical seal MCHS If only a mechanical seal has to be replaced the pump will have to be disassembled first Then the relevant bearing housing will have to be removed For this see 7 7 4 and 7 7 8 Then see 7 7 6 for disassembly of the mechanical seal Disassembling the MCH W S 1 Uncouple the inlet and outlet pipes Make sure that they are sufficiently supported 2 Slacken the foundation bolts and remove the pump from the pipe work Disassembling the bearing housing on the drive side 1 Uncouple the coupling halve from the pump shaft
37. correct type of grease see paragraph 10 6 Fit the bearings 0210 one by one using a suitable assembly bush which rests on both the inner and outer rings of the bearing Up to and including 8 impellers there is only 1 ball bearing Make sure the bearings are in the correct position the inner ring of the ball bearing must be fitted with the smallest diameter on the bottom see figure 8 0620 4 Z 0140 0120 4 2 lt ra TN e 0030 L C Y A 0550 LX 4 UN 0110 Z 22222 gt gt A 4 e 0100 74 figure 8 Mounting the ball bearings 4 Fit the filling ring 0140 and the external circlip 0120 to the pump shaft 5 Fitthe outermost bearing cover 0110 and the splash ring 0100 6 Secure the tie rods in their final position by tilting the pump and tightening the nuts 0160 on the bottom 7 6 Fitting the electric motor MCH S 10 Proceed as follows 1 2 Fit the key 0150 and fix the lower part of the coupling 0660 to the pump shaft Slide the sleeve over the motor shaft and then fix the other part of the coupling 0670 to the motor shaft Place the electric motor on the lantern piece Make sure that the face of the electric motor fits correctly into the lantern piece There must be gap of 3 mm between both coupling halves Secure the coupling halves Fit the rubber damping ring betwee
38. gland 0120 Tighten the nuts 0280 by hand 3 Proceed with point 7 8 7 7 8 5 Assemble the water cooled gland packing MCHW 1 First of all see points 1 and 2 under paragraph 7 8 4 2 Fitthe O rings 0300 into the covers 0030 figure 11 Bending open of a gland packing ring 3 Fitthe packing 0150 and place the cooling water cover 0030 in the pump bracket 4 Proceed with point 7 8 7 7 8 6 Assembling the mechanical seal A mechanical seal is a vulnerable precision component Leave the seal in the original packing until you start with the actual assembly Ensure that the working environment is dust free and that the parts and tools are clean Remove any paint from the components Never place the slide rings on the slide surfaces 1 Fitthe set ring 0060 and lock this by using the adjustment screw 0280 For the correct distance see the value mj in the table below mj drive side 12 5 3 2 MCHS 14axn 5 MCHS 14bxn 5 MCHS 16xn 6 5 2 Before fitting check whether the grooves for the external circlips 0220 have any sharp edges Abie 2 j 0010 gt 2 figure 10 Distance mj MCH EN D 38 Disassembly and assembly 7 8 7 5 6 M a SON PUMP Wet the clean shaft with some low surface tension water add detergent and feed the bellows part of the seal 0140 with a slight twist in clockwise direction onto the shaft
39. leaks too much 6 7 23 25 26 30 31 32 33 43 Gland or mechanical seal has to be replaced too often 6 7 23 25 26 30 32 33 34 35 36 41 Pump vibrates or is noisy 19 10 11 15 18 19 20 22 23 24 25 26 27 28 29 37 38 39 40 Bearings wear too much or become hot 23 24 25 26 27 37 38 39 40 42 Pump running rough hot or seizes 23 24 25 26 27 34 37 38 39 40 42 0 Problem solving 27 PUMP SON PU Possible causes Pump or suction pipe not sufficiently filled or vented Gas or air coming from the liquid Air lock in the suction pipe Suction pipe leaks air The pump sucks in air through the gland The sealing or flush water pipe to the gland is not connected or is blocked The lantern ring in the gland has been mounted wrongly The manometric suction head is too high Suction pipe or suction strainer is blocked Insufficient immersion of foot valve or suction pipe during operation of the pump NPSH available too low Speed too high Speed too low Wrong direction of rotation Pump does not work at the correct duty point Liquid density differs from the calculated density Liquid viscosity differs from the calculated viscosity Pump operates with too low liquid flow Wrong pump selection Obstruction in impeller or pump housing Obstruction in the pipe system Wrong installa
40. of liquid from the seal must be disposed of in a safe way Preservation In order to prevent corrosion the inside of the pump is treated with a preserving agent before leaving the factory Before commissioning the pump remove any preserving agents and flush the pump thoroughly with hot water Precautions e The area in which the pump is installed must be sufficiently ventilated An ambient temperature or air humidity which is too high or a dusty environment can have a detrimental effect on the operation of the electric motor e Behind the cooling air inlet of the motor there must be a free area of at least 1 4 of the electric motor diameter to ensure unobstructed air supply e The foundation must be hard level en flat e There should be sufficient space around the pump unit to operate and if necessary repair it e For models with gland check that the gland nuts have not been over tightened If necessary slacken the gland nuts and re tighten them by hand 0 Installation 19 N PUMP B SON PU 3 4 3 5 3 5 1 Piping Thought should be given to the following points with regard to the pipes and connection points of the pump e The suction and pressure pipes must connect perfectly and be free of tension during operation e The suction pipe bore must be adequately dimensioned This pipe must be as short as possible and led to the pump in such a way that no air pockets can be created If
41. of pressure stages 12 5 impeller diameter in cm _ Stuffing box S mechanical seal W water cooled stuffing box horizontal name of pump range Multi stage centrifugal pump 8 suction and pressure connection in cm 17 2 impellers of which the first has a reduced diameter a narrow impeller b wide impeller 20 impeller diameter in cm stuffing box 5 mechanical seal W water cooled stuffing box H horizontal MC of pump range Multi stage centrifugal pump 2 3 Applications The MCH can be used for the following applications e warm and hot water supply systems e air conditioning cooling for land and marine installations e water supply for industry water supply companies agriculture and horticulture spraying installations e washing and condensing installations e pressure increasing installations e in the process industry general industry road and marine construction MCH EN D 14 General 2 4 2 5 2 5 1 2 5 2 a SON PUMP Liquids In general the MCH pumps are suitable for pumping clean liquids such as e springwater cold and hot water e various cooling liquids e caustic soda e petrol kerosene petroleum These liquids must not affect the materials used For the materials used see the parts list in chapter 9 We advise against using t
42. order form included in this manual for ordering parts You must always state the following on the order Your address information The quantity the item number and the description of the part The pump number In the event of different voltages for the electric motor you should state the correct voltage 9 1 2 Pump number When ordering parts for a pump please quote the pump reference number on your order You can find the pump number on the type plate on the pump and on the label on the first page of these operating instructions 9 1 3 Recommended spare parts Parts marked with a are recommended spare parts MCH EN D Parts list 69 Monn PUMP B 9 2 Designs The following designs are possible in the parts list below with the exception of the MCH S 10 Cast iron e Design P cast iron pump casings stage casings and impellers e Design cast iron pump casings and stage casings bronze impellers Bronze Design bronze pump casings stage covers and impellers 0 70 Parts list 9 3 MCH S 10 74 M sounson pump M 0690 aia Bi o
43. point 7 5 3 for this 7 4 5 Disassembly of the pump stage 1 Only for MVHS10 Measure the distance from the set ring to the reduction in diameter on the shaft Slacken the lock screw 0170 and remove the set ring 0090 Remove the upper stage casing 0510 and the upper impeller 0520 Repeat this operation until all stage covers and impellers have been disassembled If there are 11 or more impellers there is also an external circlip 0560 and a support ring 0570 on the half of the impeller set Remove the keys 0630 0640 and if there are 16 impellers 0650 from the pump shaft Remove the pump shaft from the pump casing and remove the lower external circlip 0560 and the support ring 0570 Remove the tie rods from the inlet casing Unscrew the plug 0220 from the inlet casing and if replacement is necessary tap the slide bearing 0060 from the inlet casing 0010 using a bar Remove any residual packing and clean all parts 0 Disassembly and assembly 31 PUMP a SON PU 7 5 7 5 1 7 5 2 Assembly MCH S 10 Preparation for assembly e For the correct torque settings see 10 4 e For the correct lubricants and locking agents see 10 6 and 10 7 For assembly all relevant parts should always be clean and undamaged e Leave bearings and seals for as long as possible in the packing Pump assembly 1 Place a little locking agent Loctite 270 green in the bearing seat and press the
44. ring rubber plug steel sealing ring copper gland stud alloyed steel nut brass tap bolt steel suction cover cast iron bronze stage casing cast iron bronze quantity n 1 for 1 stage design impeller cast iron bronze shaft alloyed steel 155 co 5 DM wear ring bronze F wear ring bronze gt throttling sleeve alloyed steel only for MCH12 5 x 8 10 MCH 14a b x 4 7 and MCH16 x 5 10 2 wear ring bronze packing ring quantity n 3 for 1 stage design balance pipe copper only for MCH12 5 x 5 10 MCH 14a b x 4 7 and MCH16 x 0 key alloyed steel tie rod alloyed steel only for MCH12 5 x 5 10 MCH 14a b x 5 7 and MCH 3 10 nut steel only for MCH12 5 x 5 10 MCH 14a b x 5 7 and MCH 3 10 washer stainless steel angle pipe union brass only for MCH12 5 x 5 1 MCH 14a b x 4 7 ai id MCHI6X 3 10 bolt with nut steel only for MCH12 5 x 1 4 MCH 14a b x 1 3 and MCH16 x 12 plug steel only for MCH12 5 x 1 4 MCH14a b x 1 3 and MCH16 x 2 NIA BRIS sealing ring copper only for MCH12 5 x 14a b x 1 a MCHI6x 0 Parts list 77 M PUMP a 9 5 figure 32 MCHW 12 5 14a b 16 77
45. slide bearing 0060 into the inlet casing 0010 using a suitable assembly bush 2 Screw a nut 0160 on one end of all tie rods 0610 Tilt the inlet casing and push the tie rods into the inlet casing from below through the apertures 3 Then place the inlet casing with the foot onto the work surface Fit a packing ring 0600 and fit a stage cover 0510 4 Fit a key 0630 to the end of the pump shaft 0620 on the slide bearing side and slide an impeller 0520 over the bottom end of the shaft with the impeller opening pointing to the bottom 5 Fitthe support ring 0570 and fix the external circlip 0560 to the bottom of the shaft 0620 6 Place the pump shaft in the slide bearing 0060 into the inlet casing 0010 7 Fita packing ring 0600 to the edge and place a stage casing 0510 on the pressure bracket 8 Fit an impeller 0520 the inlet opening of the impeller must be pointing down If the impellers have different diameters then those with the largest diameters are fitted in the bottom of the pump 9 If required for the impeller set fit the keys 0640 and 0650 If the pump is designed with 11 impellers or more the impeller set is divided by an extra support ring 0570 and an external circlip 0560 10 Repeat the steps 7 and 8 until all impellers and stage covers have been fitted 11 If mechanical seals have to be fitted then proceed with point 7 5 4 12 Fit the set ring 0090 adjust this to X mm from the underside
46. unit MCH W S 20a to max zo sa sch L Q d Ae d figure 28 Dimensions sketch unit MCH W S 20a MCH W S MCH EN D Weight and dimensions 65 MM PUMP MCH W S MCH EN 0 66 Weight and dimensions MCH B sounson PUMP 8 12 Dimensions of unit MCH W S 20b A m to max DIN 25 ND 4 L 175 2 zb i E AP FNU 5 52 8 j 5 lt ILL ff zl fe FQ figure 29 Dimensions sketch unit MCH W S 20b MCH W S MCH EN D Weight and dimensions 67 MM PUMP MCH W S MCH EN 0 68 Weight and dimensions MCH B sounson PUMP 9 Parts list 9 1 Ordering parts and spare parts 9 1 1 Order form You can use the
47. 1 Maximum r p m 95 10 2 Permissible pressure and temperature 96 10 3 Overview graphics MCH programme 97 10 3 1 Overview graphics 3000 min 97 10 3 2 Overview graphics 1500 min 98 10 3 3 Overview graphics 3600 min 99 10 3 4 Overview graphics 1800 100 D Table of contents 7 M PUMP a 5 10 4 10 5 10 6 10 7 10 8 10 8 1 10 8 2 Torques settings Tie rod torque Post greasing of ball bearings Recommended liquid locking agents Noise data Noise as a function of pump power Noise Index Order form for spare parts 101 101 101 101 102 102 103 105 107 Table of contents 0 B sounson PUMP 1 Introduction 1 1 Introduction This manual contains important and useful information for the proper operation and maintenance of this pump It also contains important instructions to prevent potential accidents and damage and to ensure safe and fault free operation of this pump Read this manual carefully before commissioning the pump familiarize yourself with the operation of the pump and strictly obey the instructions The data published here comply with the most recent information at the time of going to press However they may be subject to later modifications Johnson Pump reserves the right to change the construction and design of the products at any time without being obliged to change earlier deliveries accordingly 1 2 Safety
48. 1 Open the cover on the terminal box on the motor 2 Disconnect the mains leads Mark the wires and the associated terminals This makes it easier when re connecting 3 Slacken the foundation bolts and the inlet and outlet pipes and remove the pump from the pipes Disassembly MCH S 10 If there is no illustration with the instruction the item numbers used relate to the illustrations in the parts list for this pump in chapter 9 Disassembly of the lantern piece 1 Disassemble the supports 1020 the pump can now be placed on the inlet casing 0010 to ease further disassembly 2 Slacken the protective sleeve for the coupling slide it up and remove the rubber damping strip from between both coupling halves 3 Slacken the bolts and nuts 0690 and remove the electric motor 0680 from the lantern piece 0030 4 Slacken the coupling half 0660 from the pump shaft 0620 and remove the key 0150 5 Remove the upper splash ring 0100 from the pump shaft and slide the lower splash ring down 6 Slacken both bearing covers 0110 Remove the upper bearing cover from the pump shaft the lower bearing cover will now be free from the shaft 7 Remove the external circlip 0290 and the filling ring 0160 from the pump shaft 8 Using pliers slacken the tie rods 0610 from the lantern piece 9 Lift the lantern piece 0530 vertically from the pump stage This will draw the bearings from the pump shaft for 2 up to and including 8 im
49. 13 2 1 Pump description 13 2 2 Type code 13 2 3 Applications 14 2 4 Liquids 15 2 5 Construction 15 2 5 1 Pump section 15 2 5 2 Impellers 15 2 5 3 Shaft seal 16 2 5 4 Bearing construction 16 2 6 Application area 17 2 6 1 Q H field 17 2 6 2 Pressure and temperature 17 MCH EN 0 Table of contents 3 B SON PUMP 2 7 2 8 3 1 3 2 3 3 3 4 3 5 3 5 1 3 5 2 3 5 3 3 6 4 1 4 2 4 3 4 4 45 4 5 1 4 5 2 4 6 4 7 5 1 5 1 1 5 1 2 5 2 5 3 5 4 5 5 7 1 7 2 7 2 1 7 2 2 Re use Scrapping Installation General Preservation Precautions Piping Installation Positioning Align the coupling Piping Connection of the electric motor Commissioning Check Preparing the pump Checking the direction of rotation Switching on the pump Adjusting the seal Gland packing Mechanical seal Check Noise Maintenance Shaft sealing Gland packing Mechanical seal Environmental influences Noise Lubrification of the bearings Fault Problem solving Disassembly and assembly Special tools Precautions Switch off the power supply Pipe support 17 17 19 19 19 19 20 20 20 21 22 22 23 23 23 23 23 24 24 24 24 24 25 25 25 25 25 25 26 26 27 29 29 29 29 29 Table of contents 0 PUMP B 7 2 3 Draining the MCHW 29 7 2 4 Draining the liquid 29 7 3 Dismantling the MCH S 10 30 7 4 Disassembly MCH S 10 30 7 4
50. 2 0260 0250 gt ISS AAS 224 A CN AS ANS i N 0750 0 59 980 777 3 vun A 2 7 gt A x SASS NO CN 00 e o iD 15 N olo N o N N MCHW 12 5 14a b 16 78 Parts list 0 MCHW 12 5 MCHW 14a b MCHW 16 cast iron see figure 32 bronze impeller iem no description bearing housing cast iron sounson PUMP pump casing cast iron bronze cooling water cover cast iron throttling bush bronze external circlip alloyed steel filling ring steel bearing cover steel bearing cover steel PO 5 5 gland cast iron bronze gt gland packing ring packing ring key alloyed steel ball bearing external circlip
51. 2 Replacing the mechanical seal MCHS 41 MCH EN D Table of contents 5 PUMP B 7 9 3 Disassembling the pump 41 7 9 4 Disassembling the bearing housing on the drive side 41 7 9 5 Disassembling the ball bearings 42 7 9 6 Disassembling the mechanical seal MCHS 42 7 9 7 Disassembling the set of stage casings 42 7 9 8 Disassembling the bearing housing on the suction side 42 7 9 9 Disassembling the ball bearing on the suction side 42 7 9 10 Disassembling the mechanical seal on the MCHS suction side 42 7 10 Assembling the MCH W S 14a b heavy bearing construction 42 7 10 1 Preparation for assembly 42 7 10 2 Sub assembly of stage casings 43 7 10 3 Pump assembly 43 7 10 4 Assembling the gland packing MCH 43 7 10 5 Assemble the water cooled gland packing MCHW 43 7 10 6 Assembling the mechanical seal MCHS 44 7 10 7 Assembling the bearing construction on the drive side 44 7 10 8 Assembling the stage set 45 7 10 9 Assembling the bearing construction on the suction side 45 7 11 Disassembling the MCH W S 20a b 46 7 11 1 Replacing the gland packing MCH MCHW 46 7 11 2 Replacing the mechanical seal MCHS 46 7 11 3 Disassembling the MCH W S 46 7 11 4 Disassembling the bearing housing on the drive side 46 7 11 5 Disassembly of the ball bearing 47 7 11 6 Disassembling the mechanical seal MCHS 47 7 11 7 Disassembling the set of stage casings 47 7 11 8 Disassembling the bearing housing on the suction side 47 7 11 9 Disassembling the
52. 78 dB 2 75 78 3 dB 3 3 dB on X axis 2 1 75 dB on Y axis 4 Highest noise level 1 75 dB 78 1 75 79 75 dB MCH EN D Technical data 103 M souNson PUMP a T MCH EN D 104 Technical data index A Adjusting the seal Applications Axial forces B Balance holes Balance pipe Ball bearings post greasing Basic type Bearing construction C Cavitation Check direction of rotation fuses Connecting cooling water supply Connection electric motor Construction Cooling water systems See Applications Coupling align align tolerances D Disassembly E Eccentric reducer Electric motor connecting F Fault Foot valve 24 14 15 15 16 101 13 16 24 25 23 23 22 22 15 21 21 29 20 34 26 20 SON PUMP G Guarantee H Hoisting Impellers Industrial installations See Applications Installation drain flushing foundation positioning Instructions L Liquid drain Liquid leakage drain Liquids See Applications Maintenance bearings gland packing mechanical seal N Noise P Pallets Piping assemble See also Installation 10 11 15 19 20 21 22 25 25 19 20 9 29 19 25 26 26 25 25 24 25 11 20 22 0 Index 105 M BH SON PUMP Piping flushing Power supply switch off Precautions Preparing the pump commission
53. IS PUMP B SON PU 422 figure 2 Lifting instructions pump 1 7 Storage If the pump is not to be used immediately the pump shaft must be turned twice per week by hand MCH EN D 12 Introduction 2 1 2 2 M a SON PUMP General Pump description The MCH is a range of horizontal high pressure stage pumps with closed impellers The range consists of the following 7 basic types MCH 10 12 5 14a e 14b 16 20 e 20b Each basic type be designed with one more pressure stages Flange dimensions bolt circle and number of holes are according DIN 2535 ND 40 The pump is driven by a standard IEC foot motor The power is transmitted through a flexible coupling An exception to the above is the MCH 10 which has connections with internal screw thread and is driven by an electric flange motor Due to the modular design of the construction parts there is a high level of interchangeability even with other types of multistage pumps such as the MCV or the MCHZ Type code Various designs of pumps are available in the MCH range The main features of the pump are shown in the type code See the examples on the next page 0 13 EIS N PUMP BH SON PU 3 2 suction and pressure connection in cm 4
54. aring housing 10 Fit the outermost bearing cover 0100 and the rubber V ring 0240 with the narrow opening pointing to the outside of the pump J figure 12 Bearing construction 0 Disassembly and assembly 39 M onn BH SON PUMP 7 8 8 Assembling the stage set 1 4 7 Fit the sub assembly which you just assembled with the shaft vertically drive side down Use a support for this with an opening to provide space for the shaft end Fit the packing ring 0660 and fit a stage casing 0510 on the pressure bracket Fit a key 0730 in the pump shaft and fit an impeller 0520 the inlet opening of the impeller must point up Repeat steps 2 and 3 until the last impeller has been fitted Secure the impeller set by fitting an external circlip 0080 to the pump shaft Fit a packing 0660 and place the suction cover 0500 on the stage set Fit a packing 0660 to the inlet casing using assembly grease Place the inlet casing 0020 over the shaft end on the stage set Fit the tie rods 0740 by using the nuts 0750 MCH14a bx4 bolts and nuts 0770 For the remaining operations see point 7 8 4 With the exception of the following points The value mj from step 1 of paragraph 7 8 6 is replaced by the value mh for which the correct values are shown in the table below mh Pump type non drive side MCHS 12 5 x n 3 2
55. ball bearing on the suction side 47 7 11 10 Disassembling the mechanical seal on the MCHS suction side 47 7 12 Assembling the MCH W S 20a b 48 7 12 1 Preparation for assembly 48 7 12 2 Sub assembly of stage casings 48 7 12 3 Pump assembly 48 7 12 4 Assembling the gland packing MCH 48 7 12 5 Assemble the water cooled gland packing MCHW 49 7 12 6 Assembling the mechanical seal MCHS 49 7 12 7 Assembling the bearing construction 49 7 12 8 Assembling the stage set 50 MCH EN 0 6 Table of contents PUMP B 8 Weight and dimensions 51 8 1 Weight 51 8 2 Dimensions MCH S 10 52 8 3 Dimensions MCH S 12 5 53 8 4 Dimensions MCH S 14a b 54 8 5 Dimensions MCH S 16 55 8 6 Dimensions MCH S 20 56 8 7 Dimensions of unit MCH W S 12 5 57 8 8 Dimensions of unit MCH W S 14a 59 8 9 Dimensions of unit MCH W S 14b 61 8 10 Dimensions of unit MCH W S 16 63 8 11 Dimensions of unit MCH W S 20a 65 8 12 Dimensions of unit MCH W S 20b 67 9 Parts list 69 9 1 Ordering parts and spare parts 69 9 1 1 Order form 69 9 1 2 Pump number 69 9 1 3 Recommended spare parts 69 9 2 Designs 70 9 3 MCH S 10 71 9 4 MCH 12 5 14a b 16 76 9 5 MCHW 12 5 14a b 16 78 9 6 MCHS 12 5 14a b 16 80 9 7 MCH 14a b with heavy bearing construction 82 9 8 MCHW 14a b with heavy bearing construction 84 9 9 MCHS 14a b with heavy bearing construction 86 9 10 MCH 20a b 88 9 11 MCHW 20A B 90 9 12 MCHS 20a b 92 10 Technical data 95 10
56. ble assembly bush for inserting the wear rings The flat side of the wear rings must be positioned equally with the flat side of the cover see figure 9 Points 2 and 3 are only applicable for design Q with bronze impellers 1 Fit the small wear rings 0590 into the covers 0510 2 Fita wear ring 0580 into the suction cover 0500 3 Fit the wear rings 0580 and 0610 into the covers 0510 The wear rings 0580 and 0590 are NOT fitted for the cover which is directly behind the pressure bracket 0030 on the drive side Wear ring 0580 is not fitted because there is no impeller on that side of the cover The throttling bush 0060 which is fitted into the pressure bracket is fitted into the edge for the wear ring 0590 Pump assembly 1 Place a little Loctite 270 Studlock on the fitting face of the throttling bush 0050 and fit the throttling bush into the pump casing 0030 for the drive side 2 Fit the external circlip 0100 to the shaft 0570 3 Fixthe throttling sleeve 0600 to the shaft with a few drops of liquid locking agent This throttling sleeve is used from 8 stages and higher 4 Push the pump shaft 0570 with the drive side from the inside out through the pressure bracket 0030 Assembling the gland packing MCH 1 Fitthe 5 packing rings Place the packing rings with the openings offset The packing rings may only be bent open axially see figure 14 2 Fitthe gland 0140 Tighten the nuts 0290 by han
57. casing material cast iron remarks outlet casing cast iron lantern piece cast iron plug steel slide bearing bronze PTFE set ring bronze splash ring rubber bearing cover steel external circlip steel internal circlip steel filling ring steel key steel nut steel lock screw alloyed steel mechanical seal O ring rubber 1 1 1 2 1 1 2 2 1 1 1 1 4 2 1 1 1 plug steel 2 gt stage casing cast iron for 11 stage design n 2 2 impeller noryl ball bearing external circlip alloyed steel support ring bronze packing ring for 11 stage design n 3 stud alloyed steel shaft alloyed steel key alloyed steel key alloyed steel key alloyed steel only for 16 stage design coupling half pump side cast iron coupling half motor side cast iron flange motor bolt nut steel support steel bolt steel nut steel A st A support steel 0 Parts list 75 M PUMP a 9 4 12 5 14a b 16
58. ck screw 0170 2 Fitthe rotating part of the seal 0180 with the sliding surface pointing upwards When fitting this watch out for sharp edges on the groove for the external circlip 0120 Lightly grease the O ring with acid free grease Grease must not be allowed to get on the sliding surfaces 3 Fitthe static ring of the mechanical seal 0180 into the outlet casing 0020 with the sliding surface pointing outward 4 Assemble the outlet casing and the lantern piece see from point 13 of 7 5 2 7 5 4 Assembling the gland packing 1 Grease the packing rings and the packing housing with graphite grease or silicone grease 2 Bendthe packing rings axially open see figure 7 and fit these around the pump shaft Ensure that the cuts are always at 90 with regard to each other 3 Press the packing rings well home Use a suitable gland for this 4 Place some assembly grease on the screwthread and fit the studs 0200 the gland 0190 and the gland nuts 0210 Do not tighten the gland nuts to much figure 7 Bending open of a gland packing ring MCH EN D Disassembly and assembly 33 PUMP a SON PU 7 5 5 Assembling the bearing construction If the bearing does not need to be replaced the bearing and the bearing housing will still have to be cleaned and provided with new grease 1 2 Fit the splash ring 0100 over the pump shaft Grease the bearings on both sides with ball bearing grease For the
59. d 3 Proceed with point 7 10 7 figure 14 Bending open of a gland packing ring Assemble the water cooled gland packing MCHW 1 See points 1 and 2 under paragraph 7 10 4 2 Fitthe O rings 0330 into the covers 0040 3 Fitthe packing 0180 and place the cooling water cover 0040 in the pomp bracket 4 Proceed with point 7 10 7 0 Disassembly and assembly 43 M onn PUMP B SON PU 7 10 6 Assembling the mechanical seal MCHS A mechanical seal is a vulnerable precision component Leave the seal in the original packing until you start with the actual assembly Ensure that the working environment is dust free and that the parts and tools are clean Remove any paint from the components Never place the slide rings on the slide surfaces 1 Fitthe set ring 0090 and lock this by using the adjustment screw 0330 The distance mj from the top of the set ring to the bottom of the external circlip groove must be 54 mm 2 Before fitting check whether the grooves for the external circlips 0220 have any sharp edges 3 Wetthe clean shaft with some low surface tension water add detergent and feed the bellows part of the seal 0160 with a slight twist in clockwise direction onto the shaft Apply pressure or tension during assembly via the rear end of the spring only The sliding surface must face towards the shaft end drive side 4 Wetthe seal chamber with some low surface tension water add detergent and
60. d fit the throttling bush into the pump casing 0020 for the drive side 2 Fit the external circlip 0130 to the shaft 0550 3 Fix the throttling sleeve 0110 to the shaft with a few drops of liquid locking agent 4 Push the pump shaft 0550 with the drive side from the inside out through the pressure bracket 0020 Assembling the gland packing MCH 1 Fit the 5 packing rings Place the packing rings with the openings offset The packing rings may only be bent open axially see figure 17 2 Fit the gland 0170 Tighten the nuts 0350 by hand 3 Proceed with point 7 12 7 48 MCH EN 0 Disassembly and assembly MCH B sounson PUMP figure 17 Bending open of a gland packing ring 7 12 5 Assemble the water cooled gland packing MCHW 1 First of all see points 1 and 2 under paragraph 7 12 4 2 Fitthe O rings 0390 into the covers 0030 3 Fitthe packing ring 0200 and place the cooling water cover 0030 into the pump casing 4 Proceed with point 7 12 7 7 12 6 Assembling the mechanical seal MCHS A mechanical seal is a vulnerable precision component Leave the seal in the original packing until you start with the actual assembly Ensure that the working environment is dust free and that the parts and tools are clean Remove any paint from the components Never place the slide rings on the slide surfaces and never touch the slide surfaces with ones fingers 1 Fitthe set ring 0120 and lock this by using
61. e fault 4 Using chapter 6 try to trace the cause Then take the appropriate measures Or Contact your installer 26 Maintenance 0 PUMP B 6 Problem solving Faults in a pump installation can have various causes The fault may not be in the pump it may also be caused by the pipe system or the operating conditions Firstly always check that installation has been executed in accordance with the instructions in this manual and that the operating conditions still correspond with the specifications for which the pump was purchased In general breakdowns in a pump installation are attributable to the following Causes 1 Faults with the pump 2 Breakdowns or faults in the pipe system 3 Faults due to incorrect installation or commissioning 4 Faults due to incorrect choice of pump A number of the most frequently occurring failures as well as their possible causes are shown in the table below Most common faults Possible causes Pump delivers no liquid 123456789 10 11 13 14 17 19 20 21 29 Pump has insufficient volume flow 1234567891011 13 14 15 17 19 20 21 28 29 Pump has insufficient head 245 13 14 17 19 28 29 Pump cuts out after start up 1234567891011 Pump has higher power consumption than normal 12 15 16 17 18 22 23 24 25 26 27 32 34 38 39 Pump has lower power consumtion then normal 13 14 15 16 17 18 20 21 28 29 Gland
62. e of rotation See the the instructions in the user manual belonging to the electric motor Switching on the pump 1 Switch on the pump 2 Once the pump is up to pressure slowly open the pressure cock until the working pressure is reached Make sure that the rotating parts are always sufficiently guarded when the pump is running MCH EN 0 Commissioning 23 PUMP a SON PU 45 4 5 1 4 5 2 4 6 4 7 Adjusting the seal Gland packing After the pump is started the gland will show a certain amount of leakage This leakage gradually decreases as the fibres of the packing swell up Make sure that the packing never runs dry If this occurs slacken the gland nuts so that the gland has a drip leak Once the pump has reached operating temperature the gland must be set to its final position 1 Turn both gland nuts a quarter turn one at a time 2 Repeatthis after 15 minutes 3 Continue in this way until an acceptable leakage 10 to 20 cm h is obtained Mechanical seal A mechanical seal MCHS must not show any visible leakage Check If a pump is in operation pay attention to the following The pump should never run dry Check that the system pressure always remains below the maximum permissible working pressure For the correct values see chapter 10 e The delivery from the pump must never be controlled by using the stop cock in the suction pipe This must always be fully open e Check that
63. emperature range 15 C 105 temperature range MCHS C 20 C to 120 temperature range MCHW C Working pressure is the manometric head for Q 0 increased by the pre pressure 20 C to 150 96 Technical data MCH EN 0 MCH B sounson PUMP 10 3 Overview graphics MCH programme 10 3 1 Overview graphics 3000 min 34 481 34U z SJ 12 PD 300 299 10 N cus B N IN ZOU X ac N ES 2LQ Jf NK SS NN CAL Sx T N 5 20 N N 70 0 20 U as V lt 1 2 4 A s NX X NE 3 i 5 8 N V an 18 OU x V 8 N 6 X a oU Y N N N N JA N 3 0 X lt lt 3 a LU Y A X lt 15 45 AO 1 UU gt K 3 4 TO ae Ql IE LA ine oV EK M i 40 N U 45 5 4 AQ ah 5 An 2 18 243 L 6 7 2 30 4 oU 90 SES jc S J figure 40 Survey curves 3000 min MCH EN D Technical data 97 SON PUMP 10 3 2 Overview graphics 1500 1
64. f the pump For correspondence and when ordering spare parts you should always state this number and the other information on the type plate The pump information is also stated on the label in the front of this manual Checking goods delivered Check the consignment immediately on arrival for damage and conformity with the advice note In case of damage and or missing parts have a report drawn up by the carrier at once 10 MCH EN 0 Introduction 1 6 1 6 1 1 6 2 1 6 3 onn BH SON PUMP Transport instruction Dimensions and weight The pump units in the MCH range are usually too heavy to be moved be manually Therefore use the correct transport and lifting equipment The weight of this pump unit is shown on the label in the front of this manual You can find the dimensions in chapter 8 Use of pallets The MCH is packed on a pallet Leave the pump on the pallet as long as possible This prevents unnecessary damage and makes transporting the pump easier if the pump has to be moved again for installation Use of a forklift truck always set the forks as far apart as possible and lift the pallet using both forks Hoisting When lifting a pump or complete pump units the straps must be fixed in accordance with figures 1 and 2 Never stand underneath a hoisted pump figure 1 Lifting instructions pump unit MCH EN D Introduction 11 E
65. fit the static ring of the mechanical seal 0160 into the seal cover 0040 with the sliding surface pointing out 5 Fitthe packing 0140 en fit the cover 0040 into the pressure bracket 6 Proceed with point 7 10 7 7 10 7 Assembling the bearing construction on the drive side See figure 15 Du oe figure 15 Assembly of the reinforced bearing 1 Fit the rubber V ring 0250 over the pump shaft on the drive side with the narrow opening pointing to the inside of the pump 2 Fit an internal circlip 0240 into the inner groove in the long bearing housing 0020 and fit the bearing cover 0120 to the inside of this bearing housing 3 Fix the bearing housing 0020 to the pressure bracket using the bolts 0300 4 Fit the external circlip 0230 into the inner of the 2 grooves on the pump shaft on the drive side and then fit the filling ring 0110 MCH EN 0 44 Disassembly and assembly 7 10 8 7 10 9 M PUMP a SON PU 5 Grease the bearings on both sides with ball bearing grease For the correct type of grease see paragraph 10 6 Attention Both bearings have to be fitted in X arrangement This means that both bearings have to be turned with the largest diameters facing each other 6 Fit the first of the two bearings 0220 over the pump shaft and into the seat of the bearing housin
66. g using a suitable assembly bush which rests on both the inner and outer rings of the bearing 7 Fit the spacer sleeve 0070 and fit the second of the two bearings 0220 8 Fit the other filling ring 0110 and external circlip 0230 to the pump shaft 9 Fit the waved ring 0170 into the bearing housing 10 Fit the outer bearing cover 0080 by using bolts 0310 Fit the rubber V ring 0240 with the narrow opening pointing to the outside of the pump Assembling the stage set 1 Fit the sub assembly which you have just assembled with the shaft vertically drive side down Use a support for this with an opening to provide space for the shaft end 2 Fit the packing ring 0660 and fit a stage casing 0510 on the pressure bracket Fit a key 0730 in the pump shaft and fit an impeller 0520 the inlet opening of the impeller must point up Repeat steps 2 and 3 until the last impeller has been fitted Secure the impeller set by fitting an external circlip 0080 to the pump shaft Fit a packing 0660 and place the suction cover 0500 on the stage set Fit a packing 0660 to the inlet casing using assembly grease Place the inlet casing 0030 over the shaft end on the stage set Fit the tie rods 0740 using the nuts 0750 9 For assembly of the other seal see paragraphs 7 10 4 up to and including 7 10 6 With the exception of the following point The value mj from step 1 of paragraph 7 10 6 now becomes 18 7 NO
67. he pump for an application which differs from that for which the pump was orginally supplied without discussing this with your supplier first Using a pump in a system or under system conditions liquid system pressure temperature etc for which it has not been designed can create danger for the user Consiruction Pump section The pump section is assembled from an inlet and outlet casing and a number of sections or stage casings with cast vanes The inlet and outlet casings are fitted with a cast suction and pressure flange except for the MCH 10 series For the MCH 10 the inlet and outlet casings are provided with holes with an internal screw thread The support for the inlet and outlet casings are in a vertical centre line with the suction and the pressure pipes The inlet and outlet casings are fitted with connections for pressure gauge balance pipe possible barrier liquid and drain By using guide blades the radial forces on the rotor can be disregarded over the entire capacity curve The stage casings are fitted with exchangeable wear rings To prevent turbulence and for the benefit of the required NPSH values there is a suction cover with 2 anti rotation partitions located in front of the first impeller The MCH 10 has no connections for barrier liquid no drain no wear rings and no suction cover The inlet casing is equipped directly with a suction aperture and anti rotation partitions Impellers All types of MCH pumps
68. home using a suitable piece of halved tube 5 Fit the other rings Press these well home one by one Ensure that the cuts are at 90 with regard to each other 6 Press the gland against the last packing ring and tighten the gland nuts one by one by hand Replacing the mechanical seal MCHS If only a mechanical seal has to be replaced the pump will have to be disassembled first Then the relevant bearing housing will have to be removed For this see 7 7 4 and 7 7 8 Then see 7 7 6 for disassembly of the mechanical seal Disassembling the pump 1 Uncouple the inlet and outlet pipes Make sure that they are sufficiently supported 2 Slacken the foundation bolts and remove the pump from the pipe work Disassembling the bearing housing on the drive side 1 Uncouple the coupling halve from the pump shaft 0570 and remove the key 0200 Only for MCHS Slacken the balance pipe 0670 Place the pump vertically in a support with the shaft end up Remove the rubber V ring and the bearing cover 0100 Slide the inner rubber V ring over the shaft and slacken the inner bearing cover 0100 This is now free from the pump shaft 6 Remove the outer external circlip 0220 and the filling ring 0090 from the pump shaft 7 Slacken the bolts 0270 and pull the bearing housing 0010 vertically from the pump section The bearing will be pulled from the pump shaft 8 Remove the lower external circlip 0220 and the filling ring 0090 from the
69. ing Preservation Pressure Pressure increasing installations See Applications Process installations See Applications Pump description Pump section R Re use S Safety symbols Scrapping Seal Sealing edges Special tools Spray clean pump chamber Spraying installations See Applications Static electricity Strainer System fill up T Temperature Transport Type code V Valves See Piping Voltage See also Connecting the electric motor W Warm and hot water supply systems See Applications Washing and condensing installations See Applications working switch 20 29 29 23 25 13 15 17 17 16 15 29 25 19 20 23 96 11 13 22 106 Index MCH EN D M N PUMP BH SON PU Order form for spare parts Your order will only be dealt with if this order form has been correctly completed and signed Order date Your order number Pumptype Execution Quantity Article number pump Delivery address Invoicing address BESTFORM 004 EN 107 sounson PUMP BESTFORM 004 EN 108 Johnson Pump Group Parent Company SWEDEN Johnson Pump AB Tel 46 0 19 21 83 00 Fax 46 0 19 27 23 30 National Sales Organisations AUSTRALIA Johnson Pump Australia Pty Ltd Tel 61 0 7 3899 9933 Fax 61 0 7 3899 8574 BELGIUM Johnson Pump N V S A Belgium
70. ly grease Place the pump casing suction side 0020 over the shaft end on the stage set Fit the tie rods 0670 and 0680 using the nuts 0690 For the remaining operations see point 7 12 4 With the exception of the following points The set ring must be fitted with a distance of 8 mm between the top of the set ring and the edge of the packing chamber in the pump casing Steps 9 and 10 of paragraph 7 12 7 replaced by Fit the closed bearing cover 0150 10 Fit the by pass pipe 0650 if present 50 MCH EN D Disassembly and assembly MCH B sounson PUMP 8 Weight and dimensions 8 1 Weight The weight of the pump is stated on the label in the front of this manual and on a similar label on the packaging 0 Weight and dimensions 51 B SON PUMP 8 2 Dimensions MCH S 10 4251 i EE d 6 ar 4 J j E cal 117 DTE p LI G1 4 61 4 G1 4 MCH m 1x811 2 11 7 mf et 58 ve SEN _ 20 Ox figure 19 Dimensions sketch MCH 10 MCHS 10 MCHS motor 80 F 165 80 F 165 80 F 165 90S F 165 80 F 165 90S F 165 90L F 165 90S F 165 90L F 165 90L F 165 100L F 215 90L F 165 112M F 215 100L F 215 112M F 215 100L F 215 112M F 215 112M F 215 112M F 215
71. n both coupling halves Slide the sleeve over the lower coupling half and secure it Secure the electric motor to the lantern piece using the nuts and bolts 0690 Alignment is not required due to the fitted joints Fit the support 1020 34 MCH EN D Disassembly and assembly 7 7 1 7 7 2 7 7 3 7 7 4 M PUMP B SON PU Disassembling the MCH W S 12 5 14a b 16 Make sure that the power supply to the pump is switched off and that no one can switch the pump on again unintentionally If there is no illustration with the instruction the item numbers used relate to the illustrations in the parts list for this pump in chapter 9 Replacing the gland packing MCH MCHW If the pump has to be further dismantled then replacement of the packing rings will be easier if the bearing housings 0010 are removed If only the packing rings have to be replaced then the pump does not need to be disconnected from the pipe work and it can remain on the foundation Proceed as follows this applies for both sides of the pump 1 Remove the gland nuts 0280 and pull the gland 0120 backwards 2 Remove the packing rings 0140 from the gland Use the special packing puller for this see figure 6 3 Clean the gland and then grease it with graphite grease or silicone grease Also grease the new packing rings 4 Bend open the first packing ring as shown in figure 7 and fit it around the shaft Thoroughly press the ring
72. ng ring copper gland stud alloyed steel nut brass tap bolt steel tap bolt steel grease nipple steel tap bolt steel suction cover cast iron bronze stage casing cast iron bronze impeller cast iron bronze shaft alloyed steel 5 5 5 alo Al A o A a wear ring bronze 7 wear ring bronze i throttling ring alloyed steel wear ring bronze packing ring pipe copper key alloyed steel stud alloyed steel nut steel washer stainless steel angle pipe union brass 0 Parts list 83 sounson PUMP 9 8 MCHW 14a b with heavy bearing construction oo 5 N N CN EN CN o 5 4 N o 0180 A LA NM 0580 AX A f Ecl 4 77 SSSSSSS S5 gt ASX AN ik tS XN
73. ng sleeve 0600 from the pump shaft 6 Remove the upper stage casing 0510 and the upper impeller 0520 Remove the key 0730 from the shaft Repeat this operation until all stage covers and impellers have been disassembled 7 Remove the suction cover 0030 from the pump casing 0500 Disassembling the bearing housing on the suction side 1 Position the pump casing with the shaft horizontally 2 Remove the rear bearing cover 0130 3 Continue from point 5 of 7 9 4 Disassembling the ball bearing on the suction side See 7 9 5 with the exception of point 1 Disassembling the mechanical seal on the MCHS suction side See 7 9 6 for which item no 0160 now becomes item no 0150 Assembling the MCH W S 14a b heavy bearing construction Preparation for assembly For the correct torque settings see paragraphs 10 4 and 10 5 For the correct lubricants and locking agents see paragraphs 10 6 and 10 7 For assembly all relevant parts should always be clean and undamaged Leave bearings and seals for as long as possible in the packing If the bearing does not need to be replaced the bearing and the bearing housing will have to be cleaned and provided with new grease The bearing at the non drive end is a 2RS1 type bearing and does not require any maintenance 42 MCH EN 0 Disassembly and assembly 7 10 2 7 10 3 7 10 4 7 10 5 M PUMP B Sub assembly of stage casings Use a suita
74. nson PUMP 8 5 Dimensions MCH S 16 figure 22 Dimensions sketch MCH W S 16 leakage water drain pressure gauge connection drain plug MCH MCHW MCHS 16x1 6 5 16x2 6 5 16x3 6 5 16x4 6 5 16x5 6 5 16x6 6 5 16x7 6 5 16x8 6 5 16x9 6 5 16x10 6 5 0 Weight and dimensions 55 M PUMP a 8 6 Dimensions MCH S 20 figure 23 Dimensions sketch MCH W S 20a b leakage water drain pressure gauge connection drain plug MCH MCHW MCHS 20a b x 1 20a b x 2 20a b x 3 20a b x 4 20a b x 5 20a b x 6 56 Weight and dimensions 0 MCH B sounson PUMP 8 7 Dimensions of unit MCH W S 12 5
75. of the set ring to the reduction in diameter in the pump shaft Lock the set ring with the lock screw 0170 13 Fit a packing ring 0600 and place the outlet casing 0020 on the stage set Place the outlet opening in the correct position with regard to the suction opening see dimensional sketch in chapter 8 For an MCHS type pump slide the outlet casing vertically over the pump shaft in order not to damage the mechanical seal 14 Fit the internal circlip 0130 and the lower bearing cover 0110 into the lantern piece 0030 15 Place the lantern piece 0030 over the shaft end on the inlet casing Watch the position of the tie rods 16 Screw the tie rods 0610 into the lantern piece 32 MCH EN 0 Disassembly and assembly MCH B sounson PUMP 7 5 8 Assembling the mechanical seal When assembling the mechanical seal pay good attention to the following points A mechanical seal is a vulnerable component leave the seal in the original packing until you start with the actual assembly e Ensure that the working environment is dust free and that the parts and tools are clean e Remove any paint from the pump shaft and the bearing seat Never place the slide rings on the slide surfaces Proceed as follows 1 Fitthe set ring 0090 adjust this to the distance from the bottom of the set ring to reduction in the shaft diameter of the pump shaft measured in point 1 of 7 4 5 Lock the set ring with the lo
76. otor A The electric motor must be connected to the mains by an approved electrician according to the locally prevailing regulations of the electricity company e Refer to the instruction manual belonging to the electric motor e f possible mount a working switch as close as possible to the pump 0 22 Installation 44 4 2 4 4 M N PUMP B SON PU Commissioning Check Check that the shaft can rotate freely Do this by turning the shaft end at the coupling a few times by hand e Check if the fuses are fitted Check that the pressure and suction connections have been fitted to the correct positions Preparing the pump Proceed as follows both when the unit is put into operation for the first time and after the pump has been repaired 1 Fully open the stop valve in the suction pipe Close the delivery stop valve 2 Fillthe pump and the suction pipe with the liquid to be pumped 3 Rotate the pump shaft a few times by hand Top up the pump as required Checking the direction of rotation When checking the direction of rotation look out for any unguarded rotating parts 1 The direction of rotation of the pump is shown by an arrow on the bearing housing Check that the direction of rotation of the motor corresponds with that of the pump 2 Only switch the motor on for a brief period and check the direction of rotation 3 If the sense of rotation is not correct alter the sens
77. pellers 1 bearing 10 Remove the bearing cover and the splash ring from the pump shaft Disassembling the ball bearings 1 Remove the internal circlip 0130 from the bearing housing 2 Push the bearings from the bearing housing using a suitable bush which rests on the outer ring Disassembling the gland packing Proceed as follows if only the packing rings need to be replaced 1 Slacken the gland nuts and remove the gland 0190 2 Remove the packing rings from the packing housing Use the special packing puller for this see figure 6 If the reason for disassembly was replacement of the gland packing the new packing can now be fitted See from point 7 5 4 for this If the pump is to be further disassembled then removal of the packing rings will be easier if the outlet casing 0020 is removed from the stage set and the shaft end 30 MCH EN 0 Disassembly and assembly PUMP a SON PU figure 6 Removing gland packing rings 7 4 4 Disassembling the mechanical seal Before the mechanical seal can be disassembled the lantern piece will have to be removed See from point 7 4 1 for this 1 2 Remove the outlet casing 0020 from the pump shaft and remove the static ring from the mechanical seal 0180 Slide the rotating ring for the mechanical seal 0180 off the pump shaft If the reason for disassembly was to replace the mechanical seal the new mechanical seal can now be fitted See from
78. place the mechanical seal the new mechanical seal can now be fitted See from point 7 12 6 for this 7 11 7 Disassembling the set of stage casings 1 Uncouple the balance pipe 0650 if fitted 2 Only for MCHS Slacken the adjustment screw 0400 and remove the set ring 0120 3 Unscrew the nuts 0690 from the tie rods 0670 and 0680 4 Remove the pump casing 0020 from the stage set Using a suitable bush press or tap the throttling bush 0100 from the pump casing 5 Remove the external circlip 0130 and any throttling sleeve 0110 from the pump shaft 6 Remove the upper stage casing 0510 and the upper impeller 0520 Remove the key 0660 from the shaft Repeat this operation until all stage covers and impellers have been disassembled 7 Remove the suction cover 0500 from the pump casing 0020 on the suction side 7 11 8 Disassembling the bearing housing on the suction side 1 Position the pump casing with the shaft horizontally 2 Remove the rear bearing cover 0150 3 Continue from point 5 of 7 11 4 7 11 9 Disassembling the ball bearing on the suction side See 7 11 5 with exception of point 1 and whereby item no 0280 now becomes item no 0270 7 11 10 Disassembling the mechanical seal on the MCHS suction side See 7 11 6 whereby item no 0230 becomes item no 0220 MCH EN 0 Disassembly and assembly 47 sounson PUMP 7 12 7 12 1 7 12 2 7 12 3 7 12 4 Assembling the MCH W S
79. pump shaft 9 Remove the bearing cover and the rubber V ring from the pump shaft 10 Only for MCH Disassemble the gland 0120 aR 0 Disassembly and assembly 35 PUMP B SON PU 7 7 5 7 7 6 7 7 7 7 7 8 7 7 9 7 7 10 11 Only for MCHW Disassemble the cooling water cover 0030 together with the gland 0120 Disassembly of the ball bearing 1 Remove both internal circlips 0230 from the bearing bracket 2 Using suitable bush which rests on the outer ring press the bearing out of the bearing bracket Disassembling the mechanical seal MCHS 1 Remove the seal cover 0030 from the pump shaft and remove the static ring from the mechanical seal 2 Slide the rotating ring for the mechanical seal 0130 off the pump shaft If the reason for disassembly was to replace the mechanical seal the new mechanical seal can now be fitted See from point 7 8 6 for this Disassembling the set of stage casings 1 Uncouple the balance pipe 0720 if fitted 2 Only for MCHS Slacken the adjustment screw 0280 and remove the set ring 0060 3 Remove the nuts 0750 MCH14a bx4 0770 from the tie rod 0740 MCH14a bx4 bolts 0770 4 Remove the pump casing 0020 from the stage set Using a suitable bush press or tap the throttling bush 0050 out of the inlet casing 5 Remove the external circlip 0080 and any throttling sleeve 0600 from the pump shaft 6 Remove the upper s
80. r steel bearing cover steel filling ring steel gland cast iron gland packing ring a packing ring alloyed steel ball bearing ES A o ball bearing ES external circlip steel internal circlip steel V ring rubber plug steel sealing ring copper stud alloyed steel nut brass tap bolt steel angle pipe union brass O ring rubber grease nipple steel suction cover cast iron 2 1 1 1 4 2 3 4 4 4 4 8 4 2 2 1 stage casing cast iron impeller cast iron bronze shaft alloyed steel wear ring bronze 55 515 wear ring bronze m wear ring bronze packing ring pipe copper balance pipe copper only for MCH 20a b x 2 to 6 key alloyed steel stud alloyed steel stud alloyed steel nut steel plug steel only for MCH 20a b x 1 OIN sealing ring copper only for 20a b x 1 angle pipe union brass only for MCH 20a b x 2 to 6 m nm washer stainless steel 0 Parts list 91 BH SON PUMP 9 12 MCHS 20a b D CN e d m 0 00 N E Ny CN
81. re 9 Fitting the wear rings 1 Fit the small wear rings 0590 into the covers 0510 2 Fita wear ring 0580 into the suction cover 0500 3 Fitthe wear rings 0580 and 0610 into the covers 0510 The wear rings 0580 and 0590 are NOT fitted for the cover which is directly behind the pressure bracket 0020 on the drive side Wear ring 0580 is not fitted because there is no impeller on that side of the cover The throttling bush 0050 which is fitted into the pressure bracket is fitted into the edge for the wear ring 0590 Pump assembly 1 Place a little Loctite 270 Studlock on the fitting face of the throttling bush 0050 and fit the throttling bush into the pump casing 0020 for the drive side 2 Fitthe external circlip 0080 to the shaft 0570 3 Fixthe throttling sleeve 0600 to the shaft with a few drops of liquid locking agent The throttling sleeve is not used on all models see below for a list Pump type Throttling sleeve used on MCH W S 12 5 for 8 stages and higher MCH W S 14a and 14b MCH W S 16 from 5 stages and higher 4 Push the pump shaft 0570 with the drive side from the inside out through the pressure bracket 0020 Assembling the gland packing MCH 1 Fitthe 5 packing rings Place the packing rings with the openings offset The packing rings may only be bent open axially see figure 11 0 Disassembly and assembly 37 PUMP B SON PU 2 Fit the
82. s Before the pump can be repaired it must first be dismantled The following measures are required for this 7 2 1 Switch off the power supply 1 Switch off the power supply to the pump by placing the pump switch on the control box to the off position or if an operating switch is fitted by turning this OFF 2 Remove the fuses 3 Fita warning board onto the control box 7 2 2 Pipe support If the entire pump has to be removed check that the pipes are supported If this is not the case then ensure sufficient support and fixing points for the pipes first 7 2 8 Draining the MCHW A Allow the pump to cool down first 1 Close the cooling water supply 2 Slacken the drain and supply pipes to the cooling water covers and allow the cooling water chamber to empty 7 2 4 Draining the liquid A If the liquid being pumped is hot then allow the pump to cool down futher before proceeding Make sure you do not come into contact with the pumped liquid if this is hot or of an unknown composition 1 Close any relevant stop cocks 2 Drain the pump until no more liquid flows out MCH W S pump not be drained fully the horizontal position If possible place the pump vertically on the bearing cover 0110 and allow it to drain further MCH S 10 Place the pump on the inlet casing MCH EN D Disassembly and assembly 29 a SON PUMP 7 3 7 4 7 4 1 7 4 2 7 4 8 Dismantling the MCH S 10
83. shown in figure 7 and fit it around the shaft Thoroughly press the ring home using a suitable piece of halved tube 5 Fitthe other rings Press these well home one by one Ensure that the cuts are at 90 with regard to each other 6 Press the gland against the last packing ring and tighten the gland nuts one by one by hand Replacing the mechanical seal MCHS If only a mechanical seal has to be replaced the pump will have to be disassembled first Then the relevant bearing housing will have to be removed For this see 7 9 4 and 7 9 8 Then see 7 9 6 for disassembly of the mechanical seal Disassembling the pump 1 Uncouple the inlet and outlet pipes Make sure that they are sufficiently supported 2 Slacken the foundation bolts and remove the pump from the pipe work Disassembling the bearing housing on the drive side 1 Uncouple the coupling halve from the pump shaft 0570 and remove the key 0200 Only for MCHS Slacken the balance pipe 0670 Place the pump vertically in a support with the shaft end up Remove the rubber V ring 0250 and the bearing cover 0080 Slide the inner rubber V ring over the shaft and slacken the inner bearing cover 0120 This is now free from the pump shaft 6 Remove the outer external circlip 0230 and the filling ring 0110 from the pump shaft 7 Slacken the bolts 0300 and pull the bearing housing 0020 vertically from the pump section The bearings will be pulled from the pump shaft 8
84. t always known the following instructions should be observed 1 Flush the pump properly 2 Make sure the flushing liquid is discharged safely environment A Take adequate safety measures collection trough and use the correct personal protection equipment rubber gloves spectacles 2 8 Scrapping If it is decided to scrap a pump then the same steps as 2 7 must be followed first MCH EN D General 17 EIS BH SON PUMP MCH EN D 18 General 3 1 3 2 3 3 B sounson PUMP Installation General Read this manual carefully prior to installation and commissioning Non observance of these instructions can result in serious damage to the pump and this will not be covered under the terms of our guarantee Follow the instructions given step by step e Ensure that the pump can not be started if work has to be undertaken to the pump during installation and the rotating parts are insufficiently guarded e Depending on the design the pumps are suitable for liquids with a temperature of up to 150 C When installing the pump unit to work at 70 C and above the user should ensure that appropriate protection measures and warnings are fitted to prevent contact with hot pump parts e lf there is danger of static electricity the entire pump unit must be earthed e Ifthe liquid being pumped can cause danger for man or the environment measures must be taken to drain the pump in a safe way Any leakage
85. t undertaken in strict accordance with the instructions e the pump is not installed and operated in accordance with the instructions necessary repairs are not undertaken by our personnel or are undertaken without our prior written permission e modifications are made to the products supplied without our prior written permission e the spare parts used are not original Johnson Pump parts additives or lubricants used are other than those prescribed e the products supplied are not used in accordance with their nature and or purpose the products supplied have been used amateurishly carelessly improperly and or negligently e the products supplied become defective due to external circumstances beyond our control All wearing parts are excluded from the guarantee Furthermore all deliveries are subject to our General conditions of delivery and payment which will be forwarded to you free of charge on request Service and support This manual is intended for engineering and maintenance staff and for those who are in charge of ordering spare parts Ordering spare parts This manual contains the spare parts recommended by Johnson Pump as well as the instructions for ordering them A fax order form is included in this manual If you have any questions or require further information with regard to specific subjects then do not hesitate to contact Johnson Pump Pump number The pump number is stamped on the type plate o
86. tage casing 0510 and the upper impeller 0520 Remove the key 0730 from the shaft Repeat this operation until all stage covers and impellers have been disassembled 7 Remove the suction cover 0020 from the pump casing 0500 Disassembling the bearing housing on the suction side 1 Position the pump casing with the shaft horizontally 2 Remove the rear bearing cover 0110 3 Continue from point 5 of 7 7 4 Disassembling the ball bearing on the suction side See 7 7 5 with the exception of point 1 Disassembling the mechanical seal on the suction side See 7 7 6 36 MCH EN 0 Disassembly and assembly 7 8 7 8 1 7 8 2 7 8 3 7 8 4 M PUMP a SON PU Assembly Preparation for assembly For the correct torque settings see paragraphs 10 4 and 10 5 For the correct lubricants and locking agents see paragraphs 10 6 and 10 7 For assembly all relevant parts should always be clean and undamaged Leave bearings and seals for as long as possible in the packing If the bearing does not need to be replaced the bearing and the bearing housing will have to be cleaned and provided with new grease Sub assembly of stage casings Use a suitable assembly bush for inserting the wear rings The flat side of the wear rings must be positioned equally with the flat side of the cover see figure 9 772 A 22 S 0590 YL figu
87. teel internal circlip steel V ring rubber plug steel sealing ring copper tap bolt steel adjustment screw alloyed steel pipe union brass suction cover cast iron bronze stage casing cast iron bronze quantity n 1 for 1 stage design impeller cast iron bronze shaft alloyed steel 1 2 2 4 3 1 1 1 1 1 2 4 2 3 4 4 4 2 2 1 n n 1 n wear ring bronze 2 wear ring bronze i throttling sleeve alloyed steel only for MCHS12 5 x 8 10 MCHS16 x 5 10 2 wear ring bronze packing ring quantity 3 for 1 stage design balance pipe copper key alloyed steel tie rod alloyed steel only for MCHS12 5 x 5 10 MCHS14a b x5 7 516 x 3 10 nut alloyed steel only for MCHS12 5 x 5 10 MCHS14a b x 5 7 MCHS16 x washer stainless steel bolt 4 nut alloyed steel only for MCHS12 5 MCHS14a bx 1 4 MCHSt6 x 1 2 0 Parts list 81 sounson PUMP 9 7 figure 34 0260 0270 0740 0610 0500 MCH 14a b with heavy bearing construction 0240 0730
88. the adjustment screw 0400 The distance between the set ring and the nearest external circlip groove must be 64 5 mm 2 Before fitting check whether the grooves for the external circlips 0220 have any sharp edges 3 Wetthe clean shaft with some low surface tension water add detergent and feed the bellows part of the seal 0230 with a slight twist in clockwise direction onto the shaft Apply pressure or tension during assembly via the rear end of the spring only The sliding surface must face towards the shaft end drive side 4 Wetthe seal chamber with some low surface tension water add detergent and fit the static ring of the mechanical seal 0230 into the seal cover 0030 with the sliding surface pointing out 5 Fitthe packing 0200 en fit the cover 0040 into the pressure bracket 6 Proceed with point 7 12 7 7 12 7 Assembling the bearing construction See figure 18 1 Fit the bearing cover 0140 to the inside of the bearing housing for the drive side this is the part which has the arrow for the direction of rotation 2 Fit an internal circlip 0300 into the inner groove in the bearing housing Fix this bearing housing 0010 to the pressure bracket using the bolts 0360 4 Fit the rubber V ring 0310 over the pump shaft with the narrow opening pointing to the inside of the pump 5 Fit the external circlip 0290 into the inner of the 2 grooves on the pump shaft and fit the filling ring 0160
89. the differential pressure between the suction and the pressure connections corresponds with the specifications of the working point of the pump e Check that the absolute inlet pressure is sufficient so that no condensation can form in the pump This can result in cavitation Cavitation must always be prevented since this is very harmful for the pump Noise The noise generated by a pump depends to a large extent on the operating conditions The values stated in paragraph 10 8 are based on normal use of the pump driven by an electric motor When used outside of the normal area of application or in the event of cavitation the noise level can exceed 85 dB A Preventative measures must then be taken such as fitting noise insulation around the pump unit or wearing ear protectors 24 MCH EN D Commissioning 5 1 5 1 1 5 2 5 3 M PUMP B SON PU Maintenance If the pump chamber is sprayed clean water must not enter the terminal box of the electric motor Never spray water on hot pump parts These parts can burst if subject to sudden cooling and the hot pump liquid can then come out Shaft sealing Gland packing Do not tighten the gland nuts any more after the running in period and adjustment If in time the gland packing starts to leak excessively new gasket rings have to be fitted rather than tightening the gland nuts further Mechanical seal A mechanical seal generally requires no maintenance
90. this is not possible a venting facility must be fitted at the highest point If the suction pipe has a larger bore than the suction connection on the pump then an eccentric reducer must be used so that no turbulence can be created see figure 3 dA HR H UEH figure 3 Excentric reducer to suction flange e Before the pump is installed thoroughly flush the pipe first in order to remove dirt grease or any particles which are present in the pipes We recommend that you fit a fine gauze temporarily in front of the pump inlet e Assemble any loose components If the liquid is not flowing to the pump then fit a foot valve It may be possible to combine this with a strainer if the liquid to be sucked contains solid particles Installation Ensure that the pump can not be started if work has to be undertaken to the pump during installation and the rotating parts are insufficiently guarded Positioning The pump shaft and motor shaft of complete units are fitted accurately together in the factory For permanent installation use shims to ensure that the base plate is level on the foundation Then carefully tighten the nuts on the foundation bolts After that check the setting of the pump and motor shaft and readjust as required If the pump and the electric motor still have to be assembled proceed as follows 1 Fit both halves of the coupling to the pump shaft and the motor shaft respectively 2 Position the pump on the founda
91. tion and secure it with bolts 20 MCH EN 0 Installation MCH B sounson PUMP 3 Place the electric motor on the foundation Place the copper shims under the feet of the electric motor Secure the electric motor with bolts and ensure there is gap of 3 mm between both coupling halves 4 Align the coupling in accordance with the instructions below 3 5 2 Align the coupling 1 Place a ruler A on the coupling The straight edge must touch both coupling halves over their entire width see figure 4 2 Repeatthe same check on both sides of the coupling at the height of the shaft 3 To de certain the check is also undertaken using external calipers B at 2 diametrically opposed points of the sides of the coupling halves see figure 4 figure 4 Alignment of the coupling When adjusting the coupling halves the maximum permissible tolerances can be determined by using figure 5 and the associated table figure 5 Aligning tolerances MCH EN 0 Installation 21 N PUMP a SON PU External diameter of coupling mm Vamax Vamin mm 81 95 96 110 111 130 131 140 141 160 161 180 181 200 201 225 3 5 3 Piping 1 Fit the packings between the flanges and connect the pressure and the suction pipes to the pump 2 Fit the cooling water pipe for the MCHW 3 Checkthe alignment of the coupling once more 4 Fitthe protecting guard 3 6 Connection of the electric m
92. tion of the pump unit Pump and motor not correctly aligned Rotating part running out of true Rotating parts out of balance i e impellers pump shaft Pump shaft is running out of true Bearings faulty or worn Seals faulty or worn Impeller is damaged Pump shaft or shaft sleeve at position of shaft packing or running surfaces of the mechanical seal are worn or damaged Worn or dried out shaft packing Incorrectly packed gland or incorrect mounting of the mechanical seal Packing type or mechanical seal not suitable for the liquid used or operating conditions Gland or seal cover has been tightened too much or at an angle No water cooling of gland at high temperatures The sealing or flushing liquid to the gland or the mechanical seal is polluted Axial retaining of impeller or pump shaft is defective The bearings have been fitted incorrectly Too much or too little bearing lubrication Wrong or polluted lubricant Pollutants from the liquid get into the gland Too high axial force due to worn back blades or excessive inlet pressure Excessive pressure in packing chamber due to too much play in the throttling bush 28 MCH EN D Problem solving B sounson PUMP 7 Disassembly and assembly 7 1 Special tools Special tools can make certain jobs easier When this is the case it will be stated in the instructions 7 2 Precaution
93. umber of operating hours h Quantity of grease gram per bearing The ball bearings are filled with a quantity of grease on delivery which is sufficient for the duty life of the bearing MCH S 14 a b with reinforced bearing drive end bearing 8000 S 16 14 a b all bearings all bearings 8000 MCHW16 all bearings MCHW20 a b suction side bearing MCHW20 a b MCH S 12 5 drive end bearing all bearings MCH S 14 a b all bearings MCH S 14 a b with reinforced bearing suction side bearing MCH S 20 a b The recommended types of grease are listed in paragraph 10 6 Fault all bearings Remarks In case the pump is overhauled the bearings and bearing chambers have to be cleaned and provided with new grease 2RS1 bearings do not require maintenance post greasing is not necessary If you want to find the nature of a fault remember that the pump may be under pressure or that the contents may be hot Take the correct safety measures and protect yourself gloves safety goggles The cause of electrical faults can also be in the wiring In that case call in a recognized electrical contractor If you are sure that the problem is with the pump then proceed as follows 1 Switch off the power supply to the pump Secure the operating switch using a lock or remove the fuses 2 Close the stop cocks 3 Take a note of the nature of th
94. use after the complete machine of which the pump under consideration forms part has been made and declared to comply with that directive Assen Janary 1st 2004 P Ressenaar Director II B EN MCH B sounson PUMP Instruction manual All technical and technological information in this manual as well as possible drawings made available by us remain our property and shall not be used otherwise than for the operation of this MCH pump copied duplicated made available to or brought to the notice of third parties without our prior written consent Johnson Pump Water BV hereafter called Johnson Pump is part of Johnson Pump International AB The core activities of Johnson Pump International AB are the development production sale and maintenance of pumps and pump units Johnson Pump Water BV P O Box 9 9400 AA Assen The Netherlands Tel 31 0 592 376767 Fax 31 0 592 376760 2004 Johnson Pump Water BV MCH EN 0402 4 0 MCH EN D Instruction manual MCH 1 EIS ON PUMP B S U MCH EN 2 Instruction manual MCH B SON PUMP Table of contents 1 Introduction 9 1 1 Introduction 9 1 2 Safety 9 1 3 Guarantee 10 1 4 Service and support 10 1 4 1 Ordering spare parts 10 1 4 2 Pump number 10 1 5 Checking goods delivered 10 1 6 Transport instruction 11 1 6 1 Dimensions and weight 11 1 6 2 Use of pallets 11 1 6 3 Hoisting 11 1 7 Storage 12 2 General
95. with the exception of the MCH 10 are fitted with closed impellers designed with 2 sealing edges and balance holes As a result of this the axial forces on the rotor are reduced to a minimum The remaining forces are taken up by an axially mounted bearing The impellers are held on the shaft by 2 stainless steel external circlips The MCH 10 is fitted with closed impellers which are made of glass reinforced plastic Both parts are ultrasonically welded and have a very smooth surface so that growth development is restricted The light weight and the accurate design guarantee long and noise free operation 0 15 N PUMP a SON PU 2 5 3 2 5 4 Shaft seal The shaft seal for the MCH is available in 2 variants 1 and MCHW Standardized stuffing box packing rings Pumps for which the pressure in the gland becomes too high are designed with a balance pipe MCHS Mechanical seal with bellows Cooling and lubrification of this seal is undertaken by circulation of the pumped liquid via a balance pipe Bearing construction All MCH MCHW MCHS pumps with the exception of the MCH S 10 are designed with 2 grease lubricated deep groove ball bearings Depending on the number of pressure stages the MCH S 10 is fitted with either 1 or 2 single row angular contact bearings on the pressure side A slide bearing is fitted in the inlet casing on the suction side and this is lubricated b
96. y the pumped liquid For the types MCH MCHW MCHS 20a and 20b a double row angular contact bearing is used on the pressure side Pumps with heavy bearing constructions used for MCH MCHW MCHS 14a and 14b are fitted with 2 single row angular contact bearings on the pressure side MCH S 12 5 14a b with standard bearings and 20a b are provided with 2RS1 bearings The MCH 16 and MCHS 16 MCHW 14a b MCHW 16 and MCHW 20a b are fitted with grease nipples so that these bearings can be greased periodically MCH S 10 The ball bearings and the ball bearing housing are filled with a quantity of grease on delivery which is sufficient for the life of the bearing MCHW The ball bearings and the ball bearing housings are filled on delivery with a quantity of special grease suitable for high temperatures The bearing housings are fitted with 2 holes so that the gland housing is easy to access The bearing on the pressure side is axially fixed The bearing is sealed by means of rubber V rings 16 MCH EN D General B sounson PUMP 2 6 Application area 2 6 1 Q H field Capacity Head Tolerances according to DIN 1944 class 111 2 6 2 Pressure and temperature The maximum permitted pressures and temperatures are stated in paragraph 10 2 2 7 Re use The pump may only be used for other applications after prior consultation with Johnson Pump or your supplier Because the medium which was pumped last is no

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