GE mn-28000_series Technical Specifications
Contents
1. 5 7 MAINTENANCE OPERATIONS SPECIFIC TO THE 7700E POSITIONER REFER TO ATEX INSTRUCTION MANUAL No 185977 FOR ALL MAINTENANCE ON THE ELECTRICAL PARTS OF THE 7700E POSITIONER A Loosen screws 27 and remove I P module 20 Note If damaged the I P module must be replaced B Check that O rings 28 29 and 30 and their seats are not worn or damaged Note All worn or damaged parts must be replaced C Fit O rings 28 29 and 30 in their recesses on the I P module 20 Refit I P module 20 on manifold block 144 Tighten screws 27 Note To ensure correct positioner performance check that all gaskets are perfectly leaktight 20 5 8 CONVERTING A 7700P POSITIONER PNEUMATIC INTO A 7700E POSITIONER ELECTROPNEUMATIC A kit comprising the manifold block 144 and the I P module 20 is available from your local Masoneilan representative or the Spare Parts Department REFER TO ATEX INSTRUCTION MANUAL No 185977 FOR ALL MAINTENANCE ON THE ELECTRICAL PARTS OF THE 7700E POSITIONER Shut off the signal and supply pressure Isolate and depressurize the valve body A Disconnect the two pressure connection nuts 1384 and pull the tubing 140 out B Loosen the two cap screws 141a and remove manifold block 144 The spring 158 gasket 146 and the three O rings the pilot valve assembly 155 to 157 shims 145 and O ring 153 do not need to be removed unless you have new parts Otherwise simply check2. and pull tubing 140 out Remove the four cap screws 139 and diaphragm cover 137 Remove the worn diaphragm Form new diaphragm 136 and fit it on the piston as shown in figure 17 Fit the diaphragm roll into the bracket groove Take care not to twist or bend the diaphragm during replacement Refit diaphragm cover 137 with the four screws 139 and reconnect the tubing with the two pressure connection nuts 138a Check that all connections are leaktight Figure 17 Diaphragm replacement 5 2 ADDING PACKING RING Figures 18 26 and 27 A Before adding packing ring the valve must be isolated and all pressure released Remove packing flange nuts 8b lift the packing flange and follower and insert a new packing ring Tighten nuts 8b finger tight and then tighten one full turn with the wrench Figure 18 Adding a packing ring 5 3 DISASSEMBLY Figures 5 24 25 26 27 28 and 29 In some cases it may be necessary to disassemble the VariPak valve for example to replace the plug seat ring assembly fitting new parts or changing the maximum C value or to change the packing rings when the maximum C is less than 0 6 Note If the maximum C 2 0 6 a quick change method can be used to avoid disassembling the valve see page 18 Caution The valve must be isolated and pressure vented before disassembly A Loosen cover screws 109 and remove cover 110 If the valve is equipped with a handwheel loosen cove
3. valve Figures 14 and 27 This adjustment is only required if the piston 131 has been removed In this case it should be carried out during reassembly before coupling the levers 21 and 22 to the clevises chap MAINTENANCE Reassembly step K page 17 With the piston resting against diaphragm cover 137 turn clevis 104b so that the top of the actuator bracket 108 is 0 5 mm to 1 mm from the bottom of indicator 126 A shim will simplify this operation Couple lever No 2 22 in this clevis position Admit enough air pressure to disengage locknut 125 and tighten it against the indicator Check that indicator 126 is correctly positioned Release air pressure 4 2 PLUG STEM ADJUSTMENT 4 2 1 Adjusting the plug stem on the VariPak 28001 single lever valve Figures 15 16 and 26 This adjustment should be carried out during reassembly before coupling the lever 113 to the clevises A Loosen nut 103 and turn the plug stem using a screwdriver while blocking clevis 1040 until the clevis is in the position shown in figure 15 Lock nut 103 ES mm araka dremi 27 mmi Figure 15 Presetting the plug stem position B Fit lever 113 with spring clamp 115 positioning hole facing upwards fit pin 105 into hole A then fit pin 18 into clevis 104a Note All pins should be greased slightly before fitting C Press the lever on the actuator side to check for plug seat ring leaks at AP 3 5 b
4. 2 3 Plug stem C max 1 2 amp 0 6 Plug stemC max 0 25 amp 0 10 Body C max lt 3 8 Body C max 3 8 Pivot pin No 3 22 108 I P module Lever No 1 Lever No 2 Adjustment pin C adjustment knob C adjustment plate Adjustment plate screw Screw O ring O ring O ring 3 8 2 3 and 1 2 0 25 and WO 0 ON DN FW e e e O 1 1 1 1 1 1 1 1 1 1 1 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 4 1 1 1 O Recommended spare parts Complete subassembly includes plug and stem 183 retaining ring 182 seat ring 3e and spacer 3f see figure 2 Only for pneumatic positioner See Figure 2 T 102 105 104 105 106 107 108 109 110 112 a b c 114 115 116 117 118 119 120 121 122 123 124 125 126 127 129 130 131 133 134 135 136 137 138 139 99999 See table in figure 23 L3 pL p N NN H pP pP HP pP pP H PB pP pP 4 HP LbZaQonmHnmthn ni ibmis5ximtPifxnmrmxmrm Grommet support plate Spring button Locknut Clevis Pivot pin No 1 Conical compression spring Grommet Actuator bracket Cover screw Cover Retainer clip Balance spring Spring clamp Take up screw Locknut Handwheel locknut Handwheel bushing Handwheel Handwheel lock Lever arm stop Cover plug Pivot pin No 4 Locknut Indicator Indicator plate Indicator plate screw Speed nut Piston S A Serial plate screw Actuator spring Serial plate Diap
5. 28001 single lever air to open 3c valve 13a 2 22 Masoneilan VariPak Adjustable Cv Control Valves Instruction Manual 23 110 112 18 114 116 117 115 173 125 124 1120 22 CN Yo 2f 3 X HL N 1122 W e EB N 5 140 141b 1382 137 134 E L N 1 41 143 138a 142 i i i p Figure 27 Partial cross section of VariPak 28002 Pin No 1 adjustable C air to open valve 112a 105 112b 21 1043 25 22 23 24 109 168 Pin No 2 Figure 29 Coupling detail of levers No 1 and 2 Figure 28 Partial top view 24 DIRECT SALES OFFICE LOCATIONS AUSTRALIA Brisbane Phone 61 7 3001 4319 Fax 61 7 3001 4399 Perth Phone 61 8 6595 7018 Fax 61 8 6595 7299 Melbourne Phone 61 3 8807 6002 Fax 161 5 8807 6577 BELGIUM Phone 32 2 344 0970 Fax 32 2 344 1123 BRAZIL Phone 55 11 2146 3600 Fax 55 11 2146 3610 CHINA Phone 86 10 8486 4515 Fax 86 10 8486 5305 FRANCE Courbevoie Phone 33 1 4904 9000 Fax 33 1 4904 9010 GERMANY Ratingen Phone 49 2102 108 0 Fax 49 2102 108 111 INDIA Mumbai Phone 91 22 8354790 Fax 91 22 8354791 New Delhi Phone 91 11 2 6164175 Fax 91 11 5 1659635 ITALY Phone 39 081 7892 111 Fax 39 081 7892 208 JAPAN Chiba Phone 81 43 297 9222 Fax 81 43 299 1115 KOREA Phone 82 2 2274 0748 Fax 82 2 2274 0794 MALAYSIA Phone 60 3 2161 0322 Fax 60 3 216
6. Ensure that the hole in lever No 2 where spring clamp 115 is fitted is located above and in line with balance spring 114 Fit adjustment pin 23 in the slide of lever No 1 and screw adjustment knob 24 on its threaded end Insert the smooth end of pin 23 into the groove in lever No 2 and place lever No 1 on support bracket 108 Couple lever No 1 to actuator bracket 108 using pin 105 and two retainer clips 1120 Note Check that the clevis 104a is correctly positioned before fitting lever No 1 on the actuator support 108 To identify the position of the connecting holes of levers No 1 and 2 with respect to the required action see figure 6 J Set adjustment knob 24 to the minimum C position K If piston rod clevis 104b has not been disturbed during disassembly couple it to the end of lever No 2 using pin 124 and two retainer clips 112c Note This operation will be simplified by applying air pressure to the diaphragm 136 to set the piston rod to an intermediate position and by setting the adjustment knob to a position where lever No 2 is most accessible If the clevis 104b has been disturbed proceed with adjustment and coupling as described in Calibration section 4 1 1 page 12 L Couple clevis 104a to lever No 1 To do this press the end of the plug stem with a screwdriver until the holes in the clevis and lever No 1 are aligned Couple using the two pins 184 and retainer
7. clips 112b Note The clips are inserted on the pins between the sides of the clevis and lever No 1 M Fully unscrew take up screw 116 from spring clamp 115 then fit clamp after hooking balance spring 114 first to the positioner spring bracket of the diaphragm S A 152 and then to spring clamp 115 Note The spring clamp 115 has two holes If an Air to Open actuator is used the spring must be hooked to the top hole If an Air to Close actuator is used the spring must be hooked to the bottom hole see figure 6 18 N Admit the signal and supply pressure and complete calibration Refit cover 110 using the two screws 109 If the valve is equipped with a handwheel refit the cover then turn the handwheel clockwise until it is engaged in lever arm stop 122 Tighten cover screws 109 O If the valve body has been removed reinstall it taking the precautions given under Valve Installation on page 10 Put the valve back into service 5 5 PACKING QUICK CHANGE METHOD ONLY FOR VALVES WITH MAX Cy OF 0 6 TO 3 8 Figures 21 26 and 27 The quickest and easiest way to replace packing is to remove the entire actuator from the valve body taking care not to modify the actuator setting This method is not recommended however for valves with a maximum C less than 0 6 because of their extremely fine plugs For these valves disassemble the valve to replace the packing see DISASSEMBLY page 15 Figu
8. closing point where the plug is not tightened onto the seating the slides of levers No 1 and 2 should be perfectly parallel This characteristic makes it possible to change the adjustment knob 24 position later to obtain the required real C value B Loosen adjustment knob 24 and slide it along lever No 1 to the maximum C position on adjustment plate 25 Fully tighten adjustment knob 24 C Loosen locknut 103 and using a screwdriver turn the plug stem until the plug is just touching the seat ring If the valve has been removed from the pipe a bubble test can be performed on the calibration bench to obtain a very accurate adjustment Using the screwdriver to hold the plug stem in position tighten locknut 103 against clevis 1040 D Admit air pressure again to remove the shim then release the pressure Note On an Air to Open actuator shim thickness may be increased or decreased by one or two tenths of a millimeter to ensure that levers No 1 and 2 are perfectly parallel and to obtain the required tightness on closing especially for very low C values C lt 0 10 4 3 LIMIT STOP ADJUSTMENT Figure 5 VariPak valves include a limit stop to prevent damage to the plug and seat ring and or plug stem in the event of actuator or handwheel overstroke This device consists of a nut 180 acting as a stop screwed onto the piston rod inside the spring chamber and a locknut 181 If necessary this device shoul
9. seat ring seat ring seat ring seat ring seat ring seat ring seat ring No 6 No 5 No 4 No 3 No 2 No 1 No 0 Cy 0 050 Cy 0 10 Cy 0 60 C 0 050 C 0 10 to 0 010 to 0 04 VariPak 28001 VariPak 28002 Orifice Dia gt 2mm gt gt 23 DOES Orifice Dia l rifice Dia Er lt 3e Orifice Dia Orifice Dia ae 9 5mm 1 6 mm 4 5mm 2 2 2 Changing the plug and seat ring combination The C adjustment plate 25 in the case of the VariPak The plug and seat ring combination can be changed 28002 adjustable C valve very easily for trim Nos 1 to 9 inclusive Simply replace f necessary the actuator spring 134 see figure 3 to the following parts check the spring range corresponding to the new C The plug and seat ring see figures 1 and to select the combination required for the new Cj Max Pressure Supply Plug Seat Flow Spring Range 134 Adjustable C Single Lever No Coefficient Cy CI IV CI IV CI V mbar Psi Color Code bar Psi bar Psi bar Psi ATC 3 8 to 1 5 2 3 to 0 9 414 2 1 30 2 1 30 2 1 30 l 1 2 to 0 5 40 1660 0 6 to 0 25 0 1 E 2 3 N N 4 0 25 to 1 10 5 0 10 to 0 04 207 6 0 050 to 0 020 1 7 5 3 15 Green 1 4 20 1 4 20 1 4 20 7 0 025 to 0 010 25 1035 8 0 010 to 0 004 9 0 004 to 0 0016 Figure 3 Actuator spring ranges and supply pressures Follow the procedure described in the Disassemb
10. 3 6312 MEXICO Phone 52 5 310 9863 Fax 52 5 310 5584 THE NETHERLANDS Phone 0031 15 3808666 FOX 0031 18 1641438 RUSSIA Veliky Novgorod Phone 8162 55 7898 Fax 7 8162 55 7921 Moscow Phone 7 495 585 1276 Fax 7 495 585 1279 SAUDI ARABIA Phone 966 3 341 0278 Fax 966 3 341 7624 SINGAPORE Phone 65 6861 6100 Fax 65 6861 7172 SOUTH AFRICA Phone 27 11 452 1550 FOX 27 11 452 6542 SOUTH amp CENTRAL AMERICA AND THE CARIBBEAN Phone 55 12 2134 1201 Fax 55 12 2134 1238 SPAIN Phone 34 93 652 6430 Fax 34 93 652 6444 UNITED ARAB EMIRATES Phone 971 4 8991 777 Fax 971 4 8991 778 UNITED KINGDOM Wooburn Green Phone 44 1628 536300 Fax 44 1628 536319 UNITED STATES Massachusetts Phone 1 508 586 4600 Fax 1 508 427 8971 Corpus Christi Texas Phone 1 361 881 8182 Fax 1 361 881 8246 Deer Park Texas Phone 1 281 884 1000 Fax 1 281 884 1010 Houston Texas Phone 1 281 671 1640 Fax 1 281 671 1735 Masoneilan and VariPak are registered trademarks of the General Electric Company Other company names and product names used in this document are the registered trademarks or trademarks of their respective owners 2014 General Electric Company All rights reserved GEA30857 03 2014
11. Control valve with 7700P positioner air signal connect the supply and instrument signal lines to the appropriate connections on the manifold block 144 figure 11 Use 4 x 6 mm 1 4 O D tubing Control valve with 7700E positioner electrical signal connect the manifold block 144 air supply line and make the electrical connection for the I P module 20 igure 12 Use 4 x 6 mm 1 4 O D tubing for the air line Note Check that the supply pressure is that indicated on the serial plate 7700P or 7700E positioners can be installed on both VariPak 28001 single lever and VariPak 28002 adjustable C valves Figure 11 Connections with 7700P positioner Figure 12 Connections with 7700E positioner 3 4 Limit Switches Figure 13 In some cases limit switches can be provided for the VariPak valve on request These are wired and adjusted in the factory to customer order The black wire is connected to either the normally open or normally closed terminal of the upper limit switch The black and white wire is connected to the common terminal of this switch The red wire is connected to either the normally open or normally closed terminal of the lower limit switch The red and white wire is connected to the common terminal of this switch To adjust limit switches loosen their fasteners and move the valve to the required position Adjust the position of the switch until it trips Tighten fasteners 160 161 162
12. GE Oil amp Gas 28000 series Masoneilan VariPak Adjustable C Control Valves Instruction Manual imagination at work 2 THESE INSTRUCTIONS PROVIDE THE CUSTOMER OPERATOR WITH IMPORTANT PROJECT SPECIFIC REFERENCE INFORMATION IN ADDITION TO THE CUSTOMER OPERATOR S NORMAL OPERATION AND MAINTENANCE PROCEDURES SINCE OPERATION AND MAINTENANCE PHILOSOPHIES VARY GE GENERAL ELECTRIC COMPANY AND ITS SUBSIDIARIES AND AFFILIATES DOES NOT ATTEMPT TO DICTATE SPECIFIC PROCEDURES BUT TO PROVIDE BASIC LIMITATIONS AND REQUIREMENTS CREATED BY THE TYPE OF EQUIPMENT PROVIDED THESE INSTRUCTIONS ASSUME THAT OPERATORS ALREADY HAVE A GENERAL UNDERSTANDING OF THE REQUIREMENTS FOR SAFE OPERATION OF MECHANICAL AND ELECTRICAL EQUIPMENT IN POTENTIALLY HAZARDOUS ENVIRONMENTS THEREFORE THESE INSTRUCTIONS SHOULD BE INTERPRETED AND APPLIED IN CONJUNCTION WITH THE SAFETY RULES AND REGULATIONS APPLICABLE AT THE SITE AND THE PARTICULAR REQUIREMENTS FOR OPERATION OF OTHER EQUIPMENT AT THE SITE THESEINSTRUCTIONS DO NOT PURPORT TOCOVERALL DETAILS OR VARIATIONS IN EQUIPMENT NOR TO PROVIDE FOR EVERY POSSIBLE CONTINGENCY TO BE MET IN CONNECTION WITH INSTALLATION OPERATION OR MAINTENANCE SHOULD FURTHER INFORMATION BE DESIRED OR SHOULD PARTICULAR PROBLEMS ARISE WHICH ARE NOT COVERED SUFFICIENTLY FOR THE CUSTOMER OPERATOR S PURPOSES THE MATTER SHOULD BE REFERRED TO GE THE RIGHTS OBLIGATIONS AND LIABILITIES OF GE AND THE CUSTOMER OPERATOR ARE STRICTLY LIM
13. ITED TO THOSE EXPRESSLY PROVIDED IN THE CONTRACT RELATING TO THE SUPPLY OF THE EQUIPMENT NO ADDITIONAL REPRESENTATIONS OR WARRANTIES BY GE REGARDING THE EQUIPMENT OR ITS USE ARE GIVEN OR IMPLIED BY THE ISSUE OF THESE INSTRUCTIONS THESE INSTRUCTIONS CONTAIN PROPRIETARY INFORMATION OF GE AND ARE FURNISHED TO THE CUSTOMER OPERATOR SOLELY TO ASSIST IN THE INSTALLATION TESTING OPERATION AND OR MAINTENANCE OF THE EQUIPMENT DESCRIBED THIS DOCUMENT SHALL NOT BE REPRODUCED IN WHOLE OR IN PART NOR SHALL ITS CONTENTS BE DISCLOSED TO ANY THIRD PARTY WITHOUT THE WRITTEN APPROVAL OF GE Contents de GORENG MET v rr 4 EL SO OVS OS oe T P U r 4 PA Ailey oles DEO OI KE npsontc ts cones pi etes tre RIDE ve KEITEL UAP KEIKI HILSE doadeasduennes IE 4 TS MEUM ae aeons se arte ae eave eee Gah aoe ee ee one E ee he ae eo ee eyes os eee ee 4 EO DSI OI lt a ie oe oe ee ee es Oe ee ec en ee ee os eee oe eee 5 2 1 Precise Adjustment OF the Varipak 28002 KajustaDl6 Cy Valve us qus actresce sion crt eerie pe dai rb rem em bs 5 2 2 Flow Coefficient of Varipak 28001 Single Lever and 28002 Adjustable C Valves 0 008 5 2 OU Ol EM 7 AANE MeTT rrecImT 7 2 5 REVERSING Me VaVe ACHO eestisse a ao EE EROE REIO EEES 8 SAO a3 ne e e O EEE OT E E O E R 10 sA Premna y ED eresie iR r A ERA EREA A 10 Bie Valve MOIO NEMPE 10 Soe Me UAC dna Ele Circ
14. Lower limit Upper limit ewlteh 160 161 162 Figure 13 Limit switch installation 4 Calibration VariPak valves are factory calibrated according to the components specified in the customer order If for any reason this calibration has been disturbed e g after changing from direct to reverse valve action or replacing the plug and seat ring all or some of the adjustments below must be carried out in the following order Piston rod clevis 104b adjustment Plug stem adjustment Limit stop adjustment C adjustment Positioner start up pressure adjustment 4 1 PISTON ROD CLEVIS ADJUSTMENT 4 1 1 Adjusting the piston rod clevis on the VariPak 28001 single lever valve Figures 14 and 26 This adjustment is only required if the piston 131 has been removed In this case it should be carried out during reassembly before coupling the lever 113 to the clevises chap MAINTENANCE Reassembly step H page 17 With the piston resting against diaphragm cover 137 turn clevis 104b so that the top of actuator bracket 108 is 0 5 mm to 1 mm from the bottom of indicator 126 A shim will simplify this operation Admit enough air pressure to disengage locknut 125 and tighten it against indicator Check that indicator 126 is correctly positioned Release air pressure 4 1 2 Adjusting the piston rod clevis on the Figure 14 Piston rod clevis 104b adjustment VariPak 28002 adjustable C
15. a CFCU NECEM PEI AAAA A EEEE ede EE EEEE EEEE 11 S ERU SOILS K E E E EE L E E AEE E TEE E E EENE 11 A OTO erae E T T Tm 12 4 1 Piston Rod Clevis AdjUS MENt a 2005202005 Sa I Sa ORO ERST UR RI E ANN EAERI ACERRA ATENE 12 Eo E E E E E ka s eae Ge oe E E E E E EE cod eee eu oes es 12 AS Ile LOO CIO MEN eeens EAE EEEE n oo OA AEE EE a son ERRERA A 13 AAVIK 20002 Cy AJUSIMEN aa ordures quus gr o rRNS p EEEE E E nd a SRI ENE 14 4 5 Positioner Start Up Pressure Adjustment oloon LLA 14 s OMIM EE 413320 SAPIK KASS NNESENKEEESE SSESTSP iNIEISSSSSNSS SISIS SKNA SS E E A 14 5 1 Actuator Diaphragm Removal oi ssss saa sssusa sana dues IDEE EE ER eme KES s te KOSKEE denied SN MENEE S 14 SAVAN POO hs cp acon SO KS 0 an fee eae s K ERU Het GEENI KISKE KOIN eee ee 14 PISASSA E S EH TE ESS eles ae STPV EAN ie ne HIS ESS Es S E 15 os REOSSeINION APPLIES 16 5 5 Packing Quick Change Method Only For Valves With Max Cy Of 0 6 To 3 8 0 18 5 6 7700P or 7700E Positioner Maintenance suasit aco ete pb sw aed Cede donde sundae e Reden 18 5 7 Maintenance Operations Specific to the 7700E Positioner isissessssssss Ie 19 5 8 Converting a 7700P Positioner Pneumatic into a 7700E Positioner Electro Pneumatic 20 4 1 General These installation operation and maintenance instructions apply to Masoneilan VariPak 28000 series control valves They also include a parts reference list with recommended spare
16. ad exerted on the plug clevis by the conical compression spring 106 To do this push against the plug stem end with a screwdriver while driving out the pins F Remove the two retainer clips 112a from pin No 1 105 and disengage it to uncouple lever No 1 from bracket 108 Loosen adjustment knob 24 and slide it to the maximum C setting Disengage the smooth end of the adjustment pin 23 from the groove in lever No 2 while removing lever No 1 G Drive out pin No 3 18 and remove lever No 2 22 from the bracket H Remove the two screws 26 and refit C adjustment plate 25 after turning it round to comply with the new action Refit levers No 1 and 2 in sequence making sure that pins 105 and 108 are fitted into the correct holes in the levers and bracket for the new action of the actuator see figure 6 Note Ensure that the clevis is correctly positioned before fitting the lever No 1 on the bracket 108 J Reset adjustment knob 24 to the minimum C position K Couple plug stem clevis 104a to lever No 1 following the normal reassembly procedure step L in the Reassembly section on page 17 L Hook spring 114 in the appropriate hole in spring clamp 115 see figure 6 M Admit supply and signal pressures and complete calibration Refit cover 110 using the two screws 109 If the valve is equipped with a handwheel refit the cover and turn the handwheel clockwise so that it engage
17. aking the same precautions as above Then fit the spacer 3f turning it so that one of its ports is turned towards the body outlet orifice VariPak valves with a maximum Cy of 3 8 do not include a seat ring gasket 2 B Carefully apply Never Seez grease or equivalent to the threads and bottom of the seat ring retainer 4 Using a 9 16 or 14 mm piece of hex stock and a wrench torque the retainer to 59 ftlb or 8 daN m for stainless steel reinforced graphite gaskets or 40 ft lb or 5 5 daN m for glass filled PTFE gaskets see figure 19 Note Torque the retainer to 30 ft lb or 4 daN m for valves with a maximum C of 3 8 C Insert the plug and stem assembly into the seat ring For valves with a maximum Cy lt 0 10 check that there are no friction points in the plug stroke If a friction point is detected loosen retainer 4 and reposition seat ring 3e until the stem slides smoothly Fit spacer 5 turning it so that one of its holes is aligned with safety pin 11 hole in the valve body Note For valves with a maximum C less than 0 10 check that the retaining ring 182 is fitted on the plug before fitting the plug in the spacer 3f If the retaining ring is worn or damaged replace it Figure 19 Tightening the seat ring retainer 4 D Wind two layers of PTFE tape around the safety pin 11 Screw the pin into the bonnet five and a half to six turns as from the thread engagement point Note To determine the
18. and remove balance spring 114 from the positioner E Remove the retainer clip 112b from each of the two pins 184 and disengage the pins from lever No 1 and clevis 1044 Note This operation will be simplified by relieving the load exerted on the plug clevis by the conical compression spring 106 To do this push against the plug stem end with a screwdriver while driving out the pins F Remove the two retainer clips 112c from pivot pin No 4 124 and disengage the pin to uncouple piston clevis 104b from lever No 2 22 G Remove the two retainer clips 112a from pivot pin No 1 105 and disengage the pin to uncouple lever No 1 from the actuator bracket 108 Disengage the smooth end of adjustment pin 23 from the groove in lever No 2 and remove adjustment knob 24 and adjustment pin 23 from lever No 1 H Drive out pivot pin No 3 18 and remove lever No 2 22 I Hold the plug stem in place using a screwdriver and unlock nut 103 Loosen clevis 104a and locknut 103 Remove spring button 102 spring 106 and grommet plate 101 J Remove the two packing flange nuts 8b packing flange 10 and packing follower 9 Remove the two bracket mounting nuts 8a as well as the bracket 108 K Using a packing hook remove as many packing rings 6 as possible from the packing box Remove safety pin 11 and pull the plug stem to remove the packing spacer 5 the plug and its stem and if
19. ape or a sealing compound compatible with the process to the Use ASTM A 193 Gr B 7 or equivalent carbon steel threaded pipe ends bolting for temperatures between 29 and 350 C For corrosive or cryogenic service use ASTM A 193 Gr B8 strain hardened stainless steel All the line bolting required for installation can be supplied by GE on request Figure 9 VariPak screwed connection option Alignment This valve is small and light making it easy to install on the piping Support the valve body when fitting studs Suitably shaped bosses are provided to center the valve in the line and prevent rotation before the studs are finally tightened The valve must always be installed with flow tending to open The flow arrow on the valve body must be pointing in the direction of flow Fit the bolts and tighten in criss cross fashion Figure 7 VariPak flanged connection Connected by 25 mm flanges machined to standards ISO PN 20 50 and 100 ANSI 150 300 and 600 Ib Fit gaskets compatible with service conditions between the valve body and the pipe flanges Insulation If the valve is to be insulated ensure that the insulation does not exceed the shaded area shown in figure 10 below Figure 10 Insulation limit for a VariPak valve 3 3 Pneumatic and Electrical Circuit Figures 3 11 and 12 On off valve connect the air supply line directly to the 1 8 NPT threaded connection in diaphragm cover 137
20. arg 50 psig If the valve is equipped with a handwheel lever 113 should not touch lever arm stop 122 If the valve leaks release the pressure at the inlet and remove pin 18 of clevis 1040 then loosen nut 103 Loosen the plug stem in order to move the clevis up 1040 A complete turn moves the position up by 1 mm Then tighten the locknut 103 again D Check that the distance between clevis 104b pin and the hole in lever 113 is approximately 2 mm If necessary adjust the position of clevis 104a to obtain this distance see figure 16 This value provides the initial compression of actuator spring 134 Figure 16 Agjusting the lever 113 E Admit enough air pressure to the actuator to drive piston clevis 104b upwards Couple the clevis to lever 113 using pin 124 F Release the actuator pressure and repeat the plug seat ring leak test at AP 3 5 barg 50 psig Dimension A should be the same as in figure 16 Release the valve pressure once this step is completed 4 2 2 Adjusting the plug stem on the VariPak 28002 adjustable C valve Figures 27 28 and 29 Once all the coupling operations are completed proceed as follows A Admit enough pressure to the actuator to drive out the piston rod far enough to place a shim under the indicator 126 Use a 1 5 mm shim for an Air to Open actuator and a 25 mm shim for an Air to Close actuator Release the air pressure after inserting the shim At this
21. c mode neutral position by turning the handwheel counterclockwise until the stop 122 comes into contact with the bracket 108 Note During this operation the compression is released when the stop 122 moves away from the lever 22 VariPak 28002 or 113 VariPak 28001 Continue the operation until a slight tension reappears then tighten the handwheel lock 121 VariPak actuators are equipped with a limit stop This consists of parts 180 and 181 and is designed to prevent damage to the plug and seat ring assembly and or the plug stem in the event of handwheel or actuator overstroke Note The limit stop is not used with air to open valves fitted with a handwheel and must be screwed down at the bottom of the piston 2 5 REVERSING THE VALVE ACTION Figures 5 6 26 27 and 29 Caution The valve must be isolated and pressure vented before disassembly A Loosen and remove cover 110 On valves equipped with a handwheel loosen cover screw 109 back off handwheel lock 121 and turn handwheel 120 counter clockwise to release cover 110 B Adjust the signal so that the valve closes Change the signal slightly so that the plug just moves off the seat ring On the VariPak 28002 adjustable C valve set the adjustment knob 24 to the minimum C setting C Loosen locknut 103 and using a screwdriver turn the plug stem one and three quarter turns counter clockwise Shut off the signal and the supply press
22. d be adjusted immediately after plug stem adustment see section 4 2 A Remove the shim for VariPak 28002 adjustable Cy valve only and admit sufficient supply pressure to close the valve Turn locknut 181 on the piston rod until it touches locknut 125 Turn limit stop 180 until it just touches the inside of actuator bracket 108 B Hold the limit stop with a 12 mm wrench and tighten locknut 181 Release the air pressure 13 4 4 VARIPAK 28002 C ADJUSTMENT This adjustment is carried out by moving adjustment knob 24 along adjustment plate 25 fastened to the top of lever No 1 21 See section Adjusting the Cy of a Varipak 28002 valve for each plug and seat ring combination page 7 4 5 POSITIONER START UP PRESSURE ADJUSTMENT Figures 7 25 26 and 27 A Connect the air supply and signal lines to the 7700P or 7700E with electrical signal positioner B Set the supply pressure according to the valve Cy value see the table in figure 3 C Set the signal to the minimum value for an Air to Open actuator and to the maximum value for an Air to Close actuator Turn take up screw 116 until the piston rod just begins to move Tighten locknut 117 5 Maintenance Caution Always ensure that there is no pressure in the valve actuator or positioner before maintenance or disassembly 5 1 ACTUATOR DIAPHRAGM REMOVAL Figures 17 24 25 26 and 27 A Unscrew the two pressure connection nuts 138a
23. d tighten screws 148 Check that the small signal port Oring is in its recess in the diaphragm assembly F Reinstall the block assembly on the actuator bracket Note When installing the positioner block 147 turn it so that when the manifold block 144 is installed the gauge s is are facing in the right direction figure 22 Figure 22 Positioner assembly Note how the positioner 147 and gasket 146 are oriented G Check that gasket 146 three O rings and seats are not worn or damaged and replace if necessary H Fit O ring 153 shims 145 pilot valve assembly gasket 146 and its three O rings spring 158 and manifold block 144 Tighten the screws 141a refit tubing 140 and tighten pressure connection nuts 1380 Note The ports in gasket 146 must be aligned with those in the positioner block 147 To ensure correct positioner performance check that all gaskets are perfectly leaktight I Hook spring clamp 115 to lever 22 or 113 In the case of VariPack 28001 valve see figure 6 to position the spring clamp 115 according to the actuator reguired action Admit the supply pressure and the signal Set the start up pressure following the instructions given in the Calibration chapter Put pack into service nae color code HE spring ref Positioner Signal Psi 7700P White 114 White 114 Yellow Figure 23 Color code for positioner springs 114 and 154
24. e 2 retainer clips 1120 Ensure that the holes in lever 113 where spring clamp 115 is fitted is located above Note Check that the clevis 104a is correctly positioned before fitting the lever 115 on the actuator support 108 To identify the position of the lever connecting holes and the spring clamp 115 attachment hole with respect to the required action see figure 6 Couple clevis 104q to lever 113 To do this press the end of the plug stem with a screwdriver until the holes in the clevis and lever are aligned Couple using the pin 18 and retainer clips 112b Note Slightly grease all pins before fitting Perform the adjustment operation described in Calibration section 4 2 1 page 12 J If piston rod clevis 104b has not been disturbed during disassembly couple it to the end of lever 113 by admitting air pressure to the actuator to drive clevis 104b upwards Couple the clevis to lever 113 using pin 124 and two retainer clips 112c Note If the clevis 104b has been disturbed proceed with adjustment and coupling as described in Calibration section 4 1 1 page 12 K Release the pressure from the actuator and check tightness again see Calibration section 4 2 1 page 12 Then continue from step M of the VariPak 28002 procedure Reassembly procedure for the VariPak 28002 adjustable C valve continued H Couple lever No 2 22 to the actuator bracket 108 using pin 18
25. hragm Diaphragm cover Union elbow tlincl 1380 Cover cap screw Only for handwheel optional fig 5 O Complete subassembly includes Ref Nos 155 156 and157 H Not shown 140 141 a b 142 145 O 15 146 147 lt lt EEO EOorrece 00 A Only for cast bodies N H E E N N Fr Pp PEN H H N U re PP p Tubing SCrew Output gauge Instrument gauge Manifold block Shim Gasket includes 171 amp 172 Positioner block Slotted flat c screw Positioner diaphragm S A O ring Spring Sleeve Spool Spring Spring Switch SCrew Washer Nut Wire Terminal Logo Cover washer Signal decal O ring O ring Cover plug Limit stop Locknut Retaining ring C max lt 0 10 Plug C max 0 10 Pivot pin No 2 V Only on actuator with handwheel and or Model 8013 E P positioner fig 5 A Only for optional limit switch adaptation quantity given for two limit switches see fig 13 21 116 117 115 113 130 Figure 25 Cross section of the VariPak 28001 single lever actuator and the 7700E positioner E 456 S04 1 158 141a 138a 110 112b 18 114 116 117 115 173 125 124 1126 22 7 i I r us K N J i J j j 112a 105 1a 103 102 106 104b ja 125 101 18 107 131 i 180 oo 10 EU mt 136 x 7133 i z N s N i e 138a 137 134 L W 12c Figure 26 Partial cross section of VariPak p o
26. iPak 28002 with a maximum C of 0 010 that can subsequently be calibrated on site between 0 004 and 0 010 2 2 FLOW COEFFICIENT OF VARIPAK 28001 SINGLE LEVER AND 28002 ADJUSTABLE C VALVES 2 2 1 Plug seat ring combinations trim Eight plugs and five seat rings are used to make up the ten available plug and seat ring combinations identified by codes from 0 to 9 see figure 2 The shape of each plug and the port diameter of the seat ring can be used to match parts with the table in figure 2 The difference between the four plugs in trim Nos 6 to 9 lies in the angle of the flat machined on the tip The same seat ring 3e and the same spacer 3f are used in all four cases see figure 2 Use the table in figure 1 to select the plug and seat ring combination to obtain the C value or range of C values you require FLOW COEFFICIENT Cy Trim No VARIPAK VARIPAK 28002 2600 tN isc Ree x 0 0040 0 0016 0 0020 0 0024 0 0028 0 0032 0 0036 0 0040 0 010 0 004 0 005 0 006 0 007 0 008 0 009 0 010 0 025 0 010 0 013 0 016 0 019 0 021 0 023 0 025 0 050 0 020 0 025 0 030 0055 0 040 0 045 0 050 O iie N W F as ast n wo Figure 1 MIND lt 00 o o o oa 6 Plug and seat ring No 9 C 0 004 Cy 0 004 to 0 0016 Plug and seat ring No 8 Plug and seat ring No 7 Cy 0 010 C 0 010 to 0 004 Plug and Plug and Plug and Plug and Plug and Plug and Plug and
27. l life period of 25 years or longer can be expected for the Masoneilan 28000 Series Varipak valves To maximize the useful life of the product it is essential to conduct annual inspections routine maintenance and ensure proper installation to avoid any unintended stresses on the product The specific operating conditions will also impact the useful life of the product Consult the factory for guidance on specific applications if required prior to installation 2 Operation The Masoneilan VariPak microflow control valve features a very wide range of rated flow coefficients CJ from 0 004 to 3 8 Two types of actuators are available The VariPak 28001 with a single lever designed for just one rated C This version is used when enough is known about the operating conditions when sizing the valve The VariPak 28002 with an adjustable rated Cy This valve uses a patented lever system to adjust the rated C on site to suit the actual operating conditions thereby avoiding any oversizing in flow capacity Each plug and seat ring combination can be adjusted without changing the control signal 2 1 PRECISE ADJUSTMENT OF THE VARIPAK 28002 ADJUSTABLE C VALVE The valve is adjusted using a simple but robust crossed lever system with an adjustable fulcrum This can be done easily by hand either before installation or during operation For example an application requiring a theoretical C of 0 006 could be handled using a Var
28. ly Reassembly section of the Maintenance chapter on pages 14 to 18 Also change the serial plate 135 or correct the information on the existing plate Caution If the valve in question includes a 1 2 or 3 4 NPT threaded end the maximum capacity of the body is respectively limited to trim Nos 9 to 3 inclusive or 9 to 2 inclusive A trim No 9 cannot be installed in a VariPak valve body designed for a trim No O Likewise a trim No 0 cannot be installed in valve bodies designed for other trim numbers 2 2 3 Adjusting the C of a Varipak 28002 valve for each plug and seat ring combination This is done by moving adjustment knob 24 along adjustment plate 25 fastened to the top of lever No 1 21 The adjustment plate 25 gives the range of Cy values offered by the selected plug and seat ring combination Carry out this adjustment operation as follows Figure 4 Adjusting the C of VariPak 28002 valve for each plug seat ring combination VariPak handwheel Loosen adjustment knob 24 and slide it along the lever to the required value Tighten the adjustment knob again firmly Note This operation entails moving lever No 2 either pneumatically by allowing air into the actuator or manually by pressing piston clevis 140b with a screwdriver or similar tool so that the slides of the two levers are perfectly parallel t may be necessary to reset the zero to calibrate the closure point afte
29. necessary the rest of the packing L Using a 9 16 or 14 mm piece of hex stock and a wrench unlock and pull out the seat ring retainer 4 M Remove seat ring 3 and gasket 2 using a hook made from steel wire approx diameter 5 mm Carefully fettle the hook end Note The seat ring of VariPak valves with C max 0 10 consists of two parts the seat ring proper 3e and a spacer 3f These parts have a small orifice and so cannot be removed using a hook It is therefore necessary to remove the body from the pipe and turn it over and if necessary hit the bottom with a wooden mallet If the seat ring 3a is jammed in its housing it can be removed by inserting a screwariver through the outlet orifice 15 16 VariPak valves with C max 3 8 do not have seatring gaskets 2 5 4 REASSEMBLY Figures 5 15 19 20 24 25 26 27 28 and 29 Before reassembly thoroughly clean the inside of the valve body and parts paying particular attention to gasket seating surfaces and contact surfaces Make sure to use a new seat ring gasket 2 and new packing 6 during reassembly A Insert a new seat ring gasket 2 into valve body 13 then fit seat ring 3 making sure that the gasket is correctly centered on the seat ring shoulder Turn it so that one of its ports is lined up with the valve body outlet orifice Note If the maximum C is less than 0 10 first fit the seat ring 3e on the new gasket 2 t
30. parts see page 21 IMPORTANT REMARKS Before installing operating or performing maintenance on this equipment you should read these instructions carefully and make sure you have understood them Work on this equipment should only be carried out by qualified personnel Failure to follow the instructions and precautions given in this document could lead to a malfunction and seriously damage the equipment 1 1 SPARE PARTS For maintenance purposes always use original Masoneilan spare parts obtained through your local GE representative or Spare Parts Department When ordering always give the references of the original order for the equipment concerned and in particular the number indicated on the serial plate 135 1 2 AFTER SALES DEPARTMENT GE has a highly skilled After Sales Department to assist customers with start up maintenance and repair of valves and instruments Contact your nearest GE Sales Office or Representative or the After Sales Department at the Cond sur Noireau plant in France 1 3 TRAINING GE organizes regular training courses in the operation maintenance and application of its Masoneilan control valves and instruments for customer service and instrumentation personnel at its Cond sur Noireau plant For further details contact your local GE representative or the Training Department at the Conde sur Noireau plant in France Based on general field failure data and product design analysis a usefu
31. r screws 109 and handwheel lock 121 then turn handwheel 120 counterclockwise to release cover 110 Disassembly procedure for the VariPak 28001 single lever valve B Unlock nut 117 and completely loosen screw 116 Remove spring clamp 115 from lever 113 and remove spring 114 from the positioner C Remove the two retainer clips 112c from pin 124 and disengage the pin to uncouple piston clevis 104b from lever 113 Note To simplify this operation admit air pressure to the actuator to drive the piston clevis 104b upwards then release the air pressure D Remove retainer clips 112b from pin 18 and disengage the pin from lever 113 and plug clevis 1044 E Remove two retainer clips 1120 from pin 105 and disengage the pin to uncouple lever 113 from actuator bracket 108 Now proceed in the same way as for the VariPak 28002 adjustable C valve as from step I Disassembly procedure for the VariPak 28002 adjustable C valve B Adjust the signal to close the valve Change the signal slightly so that the plug just moves off the seat ring Set adjustment knob 24 to the minimum C position C Loosen locknut 103 and using a screwdriver turn the plug stem one and three quarter turns counter clockwise Shut off signal and supply pressure Slightly tighten locknut 103 against the clevis D Completely loosen locknut 117 and screw 116 Remove spring clamp 115 from lever No 2
32. r changing the C4 2 5 ACTUATOR A single actuator allows VariPak valves to act in direct Air to Close ATC or reverse Air to Open ATO Valve action can be changed with no additional part by simply shifting the pivot pin and the attachment hole of the positioner balance spring clamp for the singlelever VariPak 28001 valve the two pivot pins for the adjustable C VariPak 28002 valve then calibrating as required Follow the instructions given under Reversing the valve action on page 8 2 4 HANDWHEELIFigure 5 The handwheel is an optional feature located on top of the cover and fitted with a locking lever Access can be gained to it directly without removing any other parts It consists of a threaded rod equipped with a handwheel 120 and a lever arm stop 122 The threaded rod rests freely on the actuator bracket 108 and is guided through the cover 110 by handwheel bushing 119 The stop consists of a block screwed onto the threaded rod The block is guided by the actuator bracket 108 Limit stop 8 When the handwheel 120 is turned clockwise the stop 122 moves up the threaded rod compressing the spring 134 and raising lever No 2 22 VariPak 28002 or 113 VariPak 28001 This closes the valve if the valve is equipped with a direct action actuator Air to Close and opens the valve if it is equipped with a reverse action actuator Air to Open The valve can be returned to automati
33. re 21 Packing replacement for C maxi gt 0 6 Vent the valve pressure and proceed as follows A Check that the plug is not resting on the seat ring For valves equipped with an Air to Open actuator admit air pressure under the diaphragm and turn the handwheel to move the plug off its seat ring B Remove safety pin 11 from the valve body The safety pin stub engages with the hole in packing spacer 5 The function of the safety pin and spacer is to prevent the plug from being pushed out if the actuator is accidentally removed while the valve is still pressurized The internal parts of the valve cannot be removed unless the safety pin is removed first Remove the two packing flange nuts 8b and back off the two actuator bracket mounting nuts 8a as far as possible C Remove the actuator plug assembly from the valve body tapping it off with a block of wood and mallet if necessary Clean the packing box in the valve body Remove the worn packing then clean the plug stem thoroughly Carefully fit new packing rings around the stem positioning the skive cut of each ring 120 from that of the adjacent ring D Refit the actuator plug assembly on the valve body taking care to align hole in packing spacer 5 with safety pin 11 hole and refit the two mounting nuts 8a Take extra care when guiding each packing ring into the packing box E Wind two layers of PTFE tape around the safety pin Screw the pin into
34. s in lever arm stop 122 Tighten cover screws 109 N Put the valve back into service Note When replacing an Air to Close actuator with an Air to Open actuator do not forget to neutralize the limit stop by screwing it down at the bottom of the piston When replacing an Air to Open actuator with an Air to Close actuator set the limit stop to the opening position AIR TO CLOSE ACTUATOR AIR TO OPEN ACTUATOR VariPak 28001 with single lever VariPak 28002 with adjustable C 2 levers Only with type 7700 positioner Figure 6 Identification of lever pivot pin holes 10 3 Installation 3 1 Preliminary Steps A Before installing the valve in the line remove alll traces of foreign material from the piping such as welding chips scale oil grease etc B Note down all the data given on the serial plate C For valve inspection without interrupting process operation a hand operated stop valve will be required on either side of the VariPak together with a hand operated throttling valve mounted on a bypass line 3 2 Valve Installation Figures 7 8 and 9 Connections The body of the ANSI Class 1500 rated VariPak valve can be l Figure 8 VariPak flanged bod Bolted between 25 mm 1 pipe flanges machined to i J y standards ISO PN 10 to PN 250 ANSI 150 300 600 The VariPak valve body can be supplied on request with 900 and 1500 Ib 1 2 3 4 or 1 NPT threaded ends Apply PTFE t
35. that parts are in perfect condition before refitting Caution Handle the shims carefully 145 C If the parts mentioned above have been removed proceed as follows Fit the O ring 153 shims 145 pilot valve assembly 155 to 157 gasket 146 and the three O rings the spring 158 and manifold block 144 I P module 20 Tighten screws 1410 refit tubing 140 and tighten pressure connection nuts 138a Note The ports in gasket 146 must be aligned with those in positioner block 147 To ensure correct positioner performance check that all gaskets are perfectly leaktight D Hook spring clamp 115 to lever 22 VariPak 28002 or 113 VariPak 28001 In the case of VariPack 28001 valve see figure 6 to position the spring clamp 115 according to the actuator required action Admit the supply pressure and enable the electrical signal Adjust the start up pressure following the instructions under Calibration Put back into service Figure 24 Cross section of the VariPak 28002 adjustable C actuator and the 7700P positioner PARTS LIST 1 4 NPT pipe plug Seat ring gasket Seat ring Cy max Seat ring C max Seat ring Cy max 0 60 Seat ring Cy max 0 10 Seat ring Cy max lt 0 10 Spacer C max lt 0 10 Seat ring retainer Packing spacer Packing ring Packing flange stud Mounting nut Packing flange nut Packing follower Packing flange Safety pin Plug stem C max 3 8 Plug stem C max
36. the bonnet five and a half to six turns as from the thread engagement point Note To determine the thread engagement point Screw the safety pin about one turn Pull the safety pin out while unscrewing it F Refit the packing follower packing flange and flange nuts 8b Tighten the packing assembly correctly If the valve is equipped with an Air to Open actuator release the air pressure or turn the handwheel to bring the plug back into contact with the seat ring Put back into service 5 6 7700P OR 7700E POSITIONER MAINTENANCE Figures 22 23 24 25 26 and 27 Caution Shut off the signal and supply pressure Isolate and depressurize the valve body A Disconnect the two pressure connection nuts 138a and pull tubing 140 out B Loosen the two cap screws 141a and remove manifold block 144 spring 158 gasket 146 and its three O rings pilot valve assembly 155 to 157 shims 145 and O ring 153 Caution Handle the shims carefully 145 C Loosen locknut 117 and take up screw 116 unhook the spring clamp from lever 22 or 113 D Unscrew cap screws 141b from positioner block 147 and remove the positioner block from the actuator bracket Remove screws 148 to separate positioner diaphragm assembly 152 and spring 154 from the positioner block Examine all the parts and replace if worn or damaged E Refit positioner diaphragm assembly 152 and spring 154 to positioner block an
37. thread engagement point Screw the safety pin about one turn Pull the safety pin out while unscrewing it E Fit the packing making sure that the skive cut of each packing ring is located 120 away from the that of the adjacent ring Push the rings down slightly using a 1 2 sch size 160 tube Fit the packing follower 9 onto the plug stem F Fit actuator bracket 108 and secure it with two nuts 8a Slip packing flange 10 onto plug stem Handtighten the two packing flange nuts and add one full turn with the wrench G Fit in the following order grommet plate 101 conical compression spring 106 and its spring button 102 see position in figure 26 and 27 Screw nut 103 and clevis 104a on the plug stem Adjust the nut and clevis without locking them together until the clevis holes are positioned approximately 2 5 mm below the alignment of the pin holes in the actuator bracket 108 for the VariPak 28001 single lever valve see figure 15 1 5 mm above the alignment of the pin holes in the actuator bracket 108 for the VariPak 28002 adjustable C valve see figure 20 Note Measuring this distance can be simplified by fitting pins 105 184 and 18 into their holes 1 5 mm Figure 20 Plug stem pre adjustment for VariPak 28002 adjustable C Reassembly procedure for the VariPak 28001 single lever valve continued H Couple lever 113 to actuator bracket 108 using pin 105 and th
38. ure Slightly tighten locknut 103 against the clevis D Unlock nut 117 and completely loosen screw 116 Unhook spring 114 from spring clamp 115 2 5 1 VariPak 28001 single lever valve E Remove retainer clips 112b from pin 18 and remove the pin from lever 113 and plug clevis 1044 Note This operation will be simplified by relieving the load exerted on the plug clevis by the conical compression spring 106 To do this push against the plug stem end with a screwdriver while driving out the pins F Remove the two retainer clips 112a from the pin 105 and disengage it to uncouple the lever 113 from the bracket 108 G Refit the levers 113 making sure that the pin 105 is fitted into the correct holes in the lever and bracket for the new action of the actuator see figure 6 Fit the spring clamp 115 into the corresponding lever hole Note Ensure that the clevis is correctly positioned before fitting the lever on the bracket H Couple the plug stem clevis 1040 to the lever 113 following the normal reassembly procedure step I in the Reassembly section on page 17 Then follow the same procedure as for the VariPak 28002 adjustable C valve as from step L 2 5 2 VariPak 28002 adjustable C valve 2 levers E Remove retainer clips 112b from each of the two pins 184 and remove pins from lever 113 and plug clevis 104q Note This operation will be simplified by relieving the lo
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