Operating Instructions Spare Parts List SPECK “BÜFFEL” Pumps
Contents
1. 11 8 4 Pump switches on automatically although taps are turned off Possible Reason Remedy Check by switching off the complete unit overnight Turn off all taps and check whether a A tap is leaking or air is escaping from the tank the pressure drops b Leaky valves or leaky safety valve cause water to Open pump and check whether the valves are sealing properly run back into the well c Foot valve intermediate valve in the suction line Switch pump off and lift safety valve at 3 5 5 5 bar If foot valve intermediate valve is leaks Water runs back into the well working properly no return flow should be heard or seen at pressure gauge of tank immediately after lever 214 has been lifted 8 5 Air escapes from tap when water is let out Possible Reason Remedy a There is too much air in the tank The well water is In this case it is advisable to disconnect the pipe of the air volume control for a while or probably very gassy and a lot of air separates into the install a special rubber lip with a very small hole into the snifting valve tank If the suction line is very long and the suction head high it could be that too much air is being pumped b Suction line leaks Find leak and seal it 8 6 Water is pumped easily till shortly before switch off pressure is reached and then the pump continues to run but does not pump any water because it c2. Operating Instructions Spare Parts List SPECK BUFFEL Pumps and Pump Units BS15 BS25 BS40 BS50 1 In General Every individual pump undergoes a lengthy test run before leaving our factory The assembled pump units comply with the EC guidelines for machinery 89 329 EEC Annex Il A 1 1 Application SPECK piston pumps are for pumping drinking water and domestic water and find their use in e Single amp Multi storey Houses Agriculture Farming Shipping Industry Horticulture Standard piston pumps and pump units are not to be used for conveying any medium other than water except if written consent is given by the manufacturer Special versions are built by us for pumping other media 1 2 Economy Speck piston pumps save energy They only require 0 25 kW h to pump 1 m of water The comparatively high price of a piston pump is rewarded in time by its low power consumption and long working life 1 3 Accessories A belt guard is available for V belt drive The law on technical appliances obligates the manufacturer to always supply a belt guard even for pumps without motors Please note this when ordering Declaration of Conformity Declaration by the Manufacturer We herewith declare on our own liability that the following pump units that the following Pumps with Motor Pump units Pumps without Motor BS15 BS15 150L Pressure Tank BS15 BS25 BS15 200L Pressure Tank BS25 BS40 BS15 300L Pressure Tank BS40 BS5
3. 1305 400 0 2015 20 21 00 1306 00 2401 20x 06 0647 00 2429 21 00 3208 5 01 0287 21x 06 1020 5x 06 0089 22 07 0485 6 01 0534 22a 21 0043 6a 07 1291 22b 07 1259 6b 06 0419 23 17 0002 Bo _ Stuffing Box mser ozz 07 2028 23a Crossheaa pin 11 0357 11 0358 11 0859 11 0960 d 06 1139 24 Oi noicator win nur foss et 07 2227 00 1938 6x 06 0220 aux Gasket 06 0312 00 2258 25 05 0034 Piston Rod Assy with Hexagon Nuts 00 2391 00 5414 00 2393 00 2394 26 Oil Splasn cap 03 0100 03 0118 03 0098 03 0167 7 11 0234 27 06 0470 7a 07 1738 28 07 1320 8 06 0877 29 00 1939 ga 07 1944 00 1940 E 00 1919 29a 06 0398 9a 21 0257 21 0268 29x 06 1020 9x 06 0118 30 03 0028 10 Cylinder Cover 03 0014 03 0040 03 0144 03 0145 30a Bearing Coverclosed 03 0013 03 0194 03 0182 0a 21 0366 30b 21 0125 ox 06 0119 30x 06 0449 u 00 2269 301 06 0409 u 07 1220 302 05 0156 12 07 1945 303 07 1321 18 _ Selt Locking Hexagon nut ozo 304 07 1540 12 00 2270 _so4a 07 1200 21 07 1219 33 07 2803 22 07 1946 33x 06 1020 119 129 Suction and Discharge Valve Retainer oz2sss 34 07 1322 113 123 06 0858 35_ Main Bearing Shat 11 0018 11 0019 11 0013 14 0014 114 124 spring Tension Disc large _ 07 1999 07 1361 35a 03 0190 115 125 vave spins ozs 07 0025 35b Notcnea na S o 116 126 Spring Tension Dise temam 07 1360 35x 06 0436 unez coweren TL f os 405 07 1313 07
4. 1925 11x12x 06 0518 _405a 07 1314 07 1924 Complete Set of Gaskets Crankcase Assy Crankcase Assy exchanged Pump Head Assy with Safety Valve 4bar Pump Head Assy with Safety Valve 6bar ez ee Air Volume Control Air Hossoom i O Drain Cock age Gasket for DrainCock 7a Tension Screw for Connecting Rod 21 0103 21 0104 21 0105 05 0066 05 0067 05 0068 05 0069 07 2618 07 2022 07 1995 7b Sleeve for Connecting Rod 7c Hexagon Nut Air Volume Control 00 2479 Air Hose 0 9 m 32 0006 Drain Cock G3 8 00 1940 Gasket for Drain Cock 06 1020 1 5 2 Exploded View N B The self locking nut in the suction valve should only be used once Please keep this in mind when ordering spare parts Valves BS15 BS25 Ce SS es B 201 214 E aan oniy for BS40 BS50 When ordering spare parts please state item number and code number of the part required as well as the pump model and year of construction which can be found on the name plate 2 Safety This Operation Manual gives basic instructions which are to be observed during installation operation and maintenance of the pump It is therefore imperative that this manual be read by the responsible personnel operator prior to assembly and commissioning It is always to be kept available at the installation site It is not only the general safety instructions contained under this main heading Safety that are t
5. come out of the tap Depending on the size of the tank it takes between 5 15 minutes until the tank is full and the pressure switch switches off at either 3 5 bar or 5 5 bar 6 6 To Let Water Out Turn tap on and let water out Pressure drops eventually to 2 or 3 bar respectively and the pump switches on again automatically Only a few air bubbles should now be visible in the suction line otherwise there is reason to believe that the suction is not correctly sealed Approximately 2000 litres of water per hour flow out of an open G1 2 tap at 3 bar pressure 6 7 On Off Switching Pressure for 4 and 6 bar units The pump unit has a diaphragm safety valve which is adjusted to an activation pressure of either 4 or 6 bar The pressure tank is also approved for max pressure of 4 or 6 bar The pressure switch must therefore be adjusted to a maximum pressure of 3 5 bar 5 5 bar otherwise it will activate the safety valve To readjust switch on switch off pressure see instructions on pressure switch Fig 111 IV Switching Stages 4 bar Pump Unit Switch On Pressure 2 bar Switch Off Pressure 3 5 bar 6 bar Pump Unit Switch On Pressure 3 bar Suction Line Switch Off Pressure 5 5 bar Fig 111 B ffel Pump Unit 7 Maintenance and Servicing 7 1 Lubrication The gear is lubricated automatically provided the pump revolves in the correct direction Oil level should be checked every three months and topped up if necessary till oil can be seen
6. litre inch l h 4 bar 6 bar approx cm approx kg 105 x 45 x 84 75 BS15 107 x 50 x 85 87 140 x 55 x 96 93 200 107 x 50x 100 105 BS2 1 x1 2 7 2 300 a 500 9 39 on 140 x 55 x 110 110 Buffel Pump Unit 1 5 Spare Parts Section 1 51 Spare Parts List 21 0051 07 0988 o 03 0044 3 Valve Bridge Stud Bolt 3a Hexagon Nut 3b Disc 4 Valve Brigde 5 Plug 07 0487 5x Gasket 06 0054 6 Plug 07 0487 6x Gasket 06 0054 00 2007 z Connecting Rod Assy XX 0 2453 00 2454 00 2455 00 2456 0 00 2753 00 2754 00 2755 00 2756 0 00 2759 00 2760 Complete Set of Gaskets Crankcase Assy Crankcase Assy exchanged Pump Head Assy with Safety Valve 4bar 00 2618 00 2619 00 2620 Pump Head Assy with Safety Valve 6bar 00 2746 00 2747 00 2748 Part No Description BS15 BS25 BS40 BS50 Part No Description BS15 BS25 BS40 BS50 01 0142 18 19 0049 ta 21 0258 18a 21 0110 1b 21 0154 18b posers Pay peas 19 0050 19 0038 19 0009 1c Hexagon Nut 07 3001 07 2398 07 0988 18c Pointed Threaded Stud 21 0113 21 0114 2 03 0027 19 23 0016 2a 21 0258 192 23 0120 2x 06 0443 19a _ Hinge Pin with Thread 14 0992 1noss1 1 0334 2b 07 0614 to HingePin tt 0205 11 0082 11 0835 2xx 06 0312 190 21 0120 3 00 2387 19 07 0162 3b Discharge Flange 20 0031 20 0032 20 0088 191 Hexagon Screw 21 0290 21 0256 3c 21 0253 00 2444 3x 06 0413 20721 00 1303 00
7. or on pallets When unpacking check for damage 4 Description 4 1 Pumpmeister SPECK piston pumps of the Buffel pump series have a thoroughly proven double helical precision gear of unsurpassed working quietness and service life When turned in the correct direction the gear is lubricated by an oil dip bath with flooded crosshead Suction and discharge connections are on the valve casing and are interchangeable Valve casing air chamber stuffing box and cylinder cover are of grey cast iron GG20 The brass suction and discharge valves 2 of each are made easily accessible by removing the air chamber The suction discharge line does not have to be removed The solid conrod is of bronze G CuSn10 The brass cylinder sleeve can be removed using set screws The duo piston is of NBR rubber Teflon impregnated packing rings are used for the piston rod sealing in the stuffing box A built in diaphragm safety valve protects against excess pressure Water will not flow out of the pump if the pressure is too high Surplus water is circulated within the pump back to the suction side 4 2 Buffelpumpe Pump Unit SPECK pump units are Buffeloumpe piston pumps on galvanized horizontal pressure tanks complete systems ready for connection They are equipped with an electric motor V belt pulleys V belts belt guard automatic air volume control pressure switch pressure gauge and a built in safety valve The automatic air volume contro
8. provided by means of a regulator so that sufficient air will be pumped d High suction head long suction line Install a suction air chamber as per 5 4 and ensure sufficient ventilation Make sure there is enough water in the well e g after a dry season e Conrod bearings in pump deflect You can not always determine the reason for knocking by ear so you have to turn the V belt pulley 18 backwards and forwards to determine any clearance between bearing and conrod Repairs to the gear are best done by a skilled tradesman f The pump V belt pulley deflects and does not sit properly on the crankshaft As described under e g One of the ball bearings is defective As described under e 8 3 Pump switches on when very little water is discharged and switches off immediately the tap is turned off Possible Reason Remedy The air cushion is not filled up sufficiently During initial operation there may not have been enough air pumped into the tank or the air the pump has pumped into the tank is escaping somewhere pressure switch pressure gauge air volume control pump connections transport damage If snifting valve and air volume control are working properly 111 III and there still is not enough air in the tank coat all threaded connections on tank with a soap solution to determine where it is leaking It could also be that the pressure switch 111 IV is not air tight
9. readjusting after approx 1 year when it has been run in and if a possible knocking sound can be heard To do this unscrew self locking hexagon nut 17c screw out inner hexagon tension screw and remove 0 1 0 5 mm of spacer shims 405 as required from connecting rod joint Screw back tension screw 17a tightly against hexagon nut After approx 1 hour of operation check whether the connecting rod has not been overadjusted and is running hot Water Filler Plug Diaphragm Safety Valve Water circulation if Uy A77 pressure is too high LZ L L CE pe WWE tal Suction SENS Discharge Line Suction valves have rubber disc under seat Pressure valves have rubber disc above seat Drain Plug Abb 115 Crosssectional Diagramm ot Casing 7 5 Air Replenishment for Cold Water Operation Only Important The pump will run smoothly and silently if there is air in the air chamber This air cushion is regulated via the snifting valve At the same time air is pumped into the pressure tank The more air there is in the pressure tank the more water can be discharged before the pump switches on again see paragraph 4 2 If the automatic air volume control has to be repaired kindly ask for our instruction sheet D10672 The unit itself is only available as a complete set 10 8 Failures and Remedies If you have trouble with your pump you may be able to help yourself by reading the tips
10. through the indicator glass 24 First oil change after 3 months operation and then every 2 years or every 6 months if the pump is running continuously This is done by unscrewing the indicator 24 or screw 16 and draining out the old oil Clean out the crankcase thereafter removing gear cover 2 and refill with fresh oil as described under paragraph 6 1 7 2 Stuffing Box The compact stuffing box is made up of Teflon impregnated packing rings and a seal ring and requires practically no maintenance at all The stuffing box must not run dry Single isolated drops serve to lubricate and cool it Should the stuffing box continuously drip tighten stuffing box nut 6a carefully by approx one 1 2 turn If this does not help the whole stuffing box 6d must be replaced In this case the seal ring 6b should also be changed Pay careful attention when installing seal ring the lip ring spring must face the piston 7 3 V Belts Important V belt 34 should not be overtensioned However it is advisable to tighten belts up again after a few days of operation When renewing V belts on multi belt drive the complete set has to be replaced 7 4 Gear Important The original SPECK high pressure B ffel pump has a double herringbone helical precision gear with a bronze connecting rod If the directions under paragraph 7 1 for lubrication are followed further maintenance is practically unnecessary Only the connecting rod alone might need
11. 0 BS25 200L Pressure Tank BS50 BS25 300L Pressure Tank comply with pertinent stipulations as per EC Machine Guidelines 98 37 EG Applied compatible standards EN 809 EN 292 T1 EN 292 T2 Electromagnetic Compatibility 89 336 EWG Applied compatible standards EN50 081 1 EN50 082 2 Use of Electrical Equipment within specified Voltage Limits 73 23 EWG Applied compatible standards j EN60 335 1 diya EN60 335 2 51 Ppa a n N N iR Technical Director Country of Origin Federal Republic of Germany SPECK KOLBENPUMPENFABRIK Otto Speck GmbH amp Co KG P O Box 1240 D 82523 Geretsried Tel 08171 62930 Telefax 08171 629399 D1620 0 1108L 1 4 Technical Data and Dimensions Buffel Piston Pump Model BS15 BS25 BS40 BS50 Flow Rate Vh 1500 2500 4000 5000 Water Head nornn l maximum m 40 60 40 60 40 60 40 60 Motor Performance at 40m kW 0 37 0 55 0 75 1 1 Motor Performance at 60m kW 0 55 0 75 1 1 1 5 No of V Belts 2 2 2 2 Profile x Inner Length 10x820 13x975 13x1120 17x1335 Connection Sizes Suction x Discharge Inch 1x1 1 x1 1 x11 4 2x1 Dimensions approx cm 52x22x32 66x23x38 75x26x42 85x36x47 Weight w o Motor approx kg 28 46 66 90 B ffelpump Pump Units Pump with Horizontal Tank Pump Model Size of Tank Connection Sizes Flow Rate Motor Performance Dimensions Weight Suct Disch kW LxBxH
12. a pressure free tank with float valve If this cannot be done a shut off regulator valve must under all circumstances be installed in the feed line A vacuum of 4 6 m has to be provided if the automatic air volume control is to function properly If the pump hammers install a suction air chamber approx 7 5 15 ltrs in the feed line A shut off valve is at all events necessary in a suction line with intake pressure so the pump can be opened for servicing 5 7 Discharge Line Refers only to installation of pump units with vertical tanks or pumps alone Important If possible the line should rise gradually upwards from the pump to the tank or at least be horizontal it should never slope downwards Only use curved joints elbows may only be used after the tank 5 8 Umtausch der Saug und Druckanschliisse Does not apply to units with horizontal tanks The suction and discharge sides of SPECK B ffel pumps can be interchanged by converting the suction and discharge valves This often saves inconvenient installation of suction and discharge lines Install clean valve seals and make sure the valves sit properly Starting torque of holding screw Valve Bridge BS15 12Nm M8 Suction Valve 4 N Discharge Valve BS25 16Nm M10 W E S rE Retainer Screw L After suction and discharge 7 valves have been exchnged the air chamber must be turned around 180 so that the safety valve is always located on the discharge
13. an t reach the final pressure Possible Reason Remedy This can happen if too much air is pumped through We recommend either installing a rubber lip with a very small hole or put the air volume the air volume control when suction lines are very control in the suction line out of action from time to time long and suction head very high This often occurs Replace rubber valve plates 113 123 Check whether piston or brass cylinder are worn when the suction line is not absolutely seal proof and out and replace as necessary allows even more air to get into the pump It can also be caused by worn out rubber valve plates worn out cylinder or pistons 8 7 Water leaks at Air Volume Control Possible Reason Remedy Rubber lip of snifting valve 29 is damaged Replace rubber lip 29a Suction Line Discharge Line Fig 111 B ffel Pump Unit 12
14. havings etc coming from new wells often get absorbed into the pump so the air chamber 5 has to be removed and the valves checked Loosen nuts above valve bridge Remove valve bridge and any crust which may be on it Valves are not screwed in If they are stuck press them loose with the handle of a hammer The valve seat seal is under the valve make sure that the seat is clean Rubber valve discs 113 123 may have to be replaced if the pump is old f Stuffing box is not seal proof Tighten up nut 6a a little If this does not help replace packing rings 6d and possibly seal rings 6b as well Do not use hemp we use Teflon impregnated packing rings 8 2 Pump Knocks Possible Reason Remedy a There is no air cushion in the air chamber Make sure that the air volume control Fig 111 IIl is working properly The snifting valve should hiss when the pump is running Check whether rubber lip 29a is dirty or clogged Air could be escaping through screw on filler plug therefore check by covering sealing surfaces of air chamber and filler plug with a soap solution b Pre pressure in pump Water level in pump air chamber is too high because snifting valve has not absorbed enough air Install regulator in suction line s 5 5 5 6 Pump should run with about 5 metre vacuum ensuring that sufficient air is pumped c Pump suction head is very low Same applies here as explained under b A vacuum must be
15. l installed in the pressure tank of the unit automatically ensures the correct ratio between water content and the necessary air cushion If the horizontal tank is half full the valve of the automatic air volume control activated by the float opens and the pump begins conveying both air and water into the tank A suction head of approx 4 6 m is required so that the pump can draw in air in the proper manner When water leaves the tank the pressure in the tank drops until the pressure eventually sinks to the automatic switch on point at which the pressure switch turns on the motor pump The amount of water which left the tank is then pumped in again until the switch off level is attained This procedure repeats itself again and again at irregular intervals depending on how often and how much water is withdrawn from the tank 4 3 Values for Pressure Switch Adjustment Pump Unit 4 bar Switch On Pressure 2 bar Switch Off Pressure 3 5 bar Pump Unit 6 bar Switch On Pressure 3 bar Switch Off Pressure 5 5 bar 5 Set Up and Installation only to be done by skilled workmen 5 1 Pump Unit The complete pump unit with horizontal pressure tank is supplied ready assembled A special foundation is not necessary The tank can be fixed to the foundation by 4 spacer blocks The room must be frost proof and dry It should also be well aired in order to prevent undesirable moisture condensate forming on the unit Moisture damages the motor If there i
16. mple non compliance may involve the following hazards e Failure of important functions of the machine plant e Failure of specified procedures of maintenance and repair e Exposure of people to electrical mechanical and chemical hazards e Endangering the environment owing to hazardous substances being released 2 4 Safety at Work The safety instructions contained in this manual the relevant national accident prevention regulations and any other service and safety instructions issued by the plant operator are to be observed 2 5 Safety Instructions Relevant for Operation e If hot or cold machine components involve hazards they must be guarded against accidental contact e Guards for moving parts e g coupling must not be removed from the machine while in operation e Any leakage of hazardous e g explosive toxic hot fluids e g from the shaft seal must be drained away so as to prevent any risk to persons or the environment Statutory regulations are to be complied with e Hazards resulting from electricity are to be prevented see for example the VDE Specifications and the by laws of the local power supply utilities 2 6 Safety Instructions Relevant for Maintenance Inspection and Assembly Work It shall be the plant operators responsibility to ensure that all maintenance inspection and assembly work is performed by authorized and qualified personnel who have adequately familiarized themselves with the subject matter by studying
17. o be observed but also the specific information provided under the other main headings 2 1 Kennzeichnung von Hinweisen in der Betriebsanleitung Safety instructions given in this manual non compliance with which would affect safety are identified by the following symbol or where electrical safety is involved with see DIN 4844 W9 see DIN 4844 W8 Safety measures which can cause damage to the machine if not adhered to are marked Important It is imperative that signs affixed to the machine e g e arrow indicating the direction of rotation e symbols indicating fluid connections be observed and kept legible 2 2 Qualification and Training of Operating Personnel The personnel responsible for operation maintenance inspection and assembly must be adequately qualified Scope of responsibility and supervision of the personnel must be exactly defined by the plant operator If the staff does not have the necessary knowledge they must be trained and instructed which may be performed by the machine manufacturer or supplier on behalf of the plant operator Moreover the plant operator is to make sure that the contents of the operating manual are fully understood by the personnel 2 3 Hazards in the Event of Non Compliance with the Safety Instructions Non compliance with the safety instructions may produce a risk to the personnel as well as to the environment and the machine and may result in a loss of any right to claim damages For exa
18. s a danger of frost the drainage plugs 15 are to be removed The piston chamber must then be emptied by closing off the suction line and running the pump for approx 30 sec To protect against accidents each pump is to be equipped with a belt guard which conforms to trade union and or general safety rules The pump motor must be protected by a correctly adjusted motor protector gt gt horizontal pressure tank and belt guard 5 2 Pump Unit with Vertical Tank Assembly In contrast to the pump units with horizontal tanks which are supplied ready assembled the units with vertical tanks have to be set up and installed by a plumber on location They function the same as the ready assembled units However we wish to point out that an automatic air volume control can also be installed in a vertical tank when the unit is being set up s fig 113 Directions D10671 for installing the automatic air volume control are available upon request Discharge Line Suction Line Fig 113 B ffel pump unit with vertical tank 5 3 B ffel Pump Single Buffel piston pumps are screwed on to a brick or concrete base and secured with foundation bolts No particular foundation is required for vertical tanks Pumps without a base plate and therefore without vibration insulation should be mounted on to a piece of anti vibration material placed between the pump and ground Fig 112 B ffel pump 5 4 Suction Line for P
19. side see figure 115 BS50 36Nm M12 Fig 114 8 6 Operation 6 1 To Fill Pump with Oil Fill crankcase with an SAE30 quality oil through opening above crosshead 23 BS15 BS25 BS40 BS50 0 2 litres 0 3 litres 0 8 litres 1 0 litres 6 2 To Fill Pump with Water Fill up pump head with water by pouring the water in via filler plug 33 At the same time turn the pump V belt pulley 18 manually in the direction of the arrow In the case of long suction lines fill right up to the foot valve intermediate valve see 5 4 6 3 Motor Alignment and Electrical Connection Using a ruler make sure the pump pulley and motor V belt pulley 18 18b are in line with each other The motor could have been shifted during transport and if the pulleys do not align precisely the belts will wear out quickly AN Electric motors must be connected as per circuit diagram which can be found in the terminal box of the electric motor This work is to be carried out by suitably qualified persons 6 4 Fittings Open shut off fittings and taps in the discharge line so that the air in the pipe system can escape 6 5 To Switch on Motor Check the direction of rotation Reverse polarity if the motor is running in the wrong direction Close the shut off fitting only after water has begun being pumped after the suction line and pump are vented clearly visible through transparent tube fig 111 11 and after water has
20. this manual in detail Any work on the machine shall only be performed when it is at a standstill Pumps and pump units which convey hazardous media must be decontaminated On completion of work all safety and protective facilities must be re installed and made operative again Prior to restarting the machine the instructions listed under Operation are to be observed 2 7 Unauthorized Alterations and Production of Spare Parts Any modification to the machine may only be made after consultation with the manufacturer Using spare parts and accessories authorized by the manufacturer is in the interest of safety Use of other parts may exempt the manufacturer from any liability 2 8 Unauthorized Modes of Operation The reliability of the machine delivered will be only guaranteed if it is used in the manner intended in accordance with clause 1 In General of this manual The limit values specified in the data sheet must under no circumstances be exceeded Pending Standards and other Data DIN4844 Part 1 Safety descriptions and safety signs W8 supplement sheet 13 DIN4844 Part 1 Safety descriptions and safety signs W9 supplement sheet 14 3 Transport and Storage Pumps and pump units must not be stored for any length of time in a humid place or where temperatures are below zero The storage room should be airy as moisture will damage the motor and thus void the warranty Pumps are packed for transportation in cardboard boxes
21. ump Units and B ffel Pumps Perfect functioning of the pump depends largely on well layed out suction lines In order to prevent air pockets the suction line should rise gradually from the well to the pump or should at least be layed horizontally It must be absolutely seal proof and the inner diameter should at least be as large as the connection on the pump Only bows are to be used no elbows It is advisable to install a foot valve or an intermediate valve in the case of a closed filter well If suction lines are longer than 30 m a suction air chamber is to be installed directly in front of the pump If vertical tanks are used fig 113 it is advisable to support heavy suction lines so that their weight does not pull on the pump 5 5 Suction Head The total gauged suction head which is the height between the water level and the pump plus loss of friction in the pipe and possible filter resistance is not to exceed 7 5 m not forgetting that in dry seasons the water level in the well may be lower than usual In the case of short suction lines or a suction head of below 2m or if input pressure is present a shut off valve not a tilted seat valve must be installed in front of the pump This shut off valve can be adjusted with greater accuracy to the required suction head ensuring the avoidance of water hammer 5 6 Intake Pressure Pump Unit as Booster Set If the inlet pressure is more than 0 3 bar 3 m it is advisable to install
22. we give you below If you cannot find the reason for the trouble call a plumber or write to us not forgetting to mention the pump model and its serial number Prior to doing any work on the pump switch off the electricity and make sure that the pump is idle and the pressure at zero 8 1 Little or no water at all is being pumped Possible Reason Remedy a Pump is running but delivers no water even though it is filled properly Remove air chamber 5 and loosen rubber valve discs 113 123 which have probably got stuck if the pump has been stored for a long time b Not sufficient water in the pump Refill pump as explained in 6 2 and at the same time turn the pump several times pouring in water little by little till there are 2 4 litres in the pump Screw on filler plug 33 again and seal carefully More water may be necessary if the suction line is very long or the suction head very high c Suction head too high suction line too long Measure difference between water level and pump flange connection fig 111 1 Compare loss of friction in long pipes with table available upon request and add the difference in height d Suction line is not seal proof After the pump has been running for a while check whether air bubbles can be seen through transparent hose Fig 111 11 above elbow on tank If so press out air find leak and make it seal proof e Soiled or worn out valves Pebbles hemp s
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