Service Manual - Amalgamated Pumping Supplies
Contents
1. 2 1ni ant eee 380 19 720 010 375 Seal U Cup 2 159 Anodized Aluminum 20 070 012 170 Bearing Sleeve 2 oo 21 685 039 1 20 Rod Diaphragm 1 ee Eana ee Oil Impregnated 22 901 012 180 Washer Sealing 2 175 Die Cast Zinc 23 170 034 330 Capscrew Hex Head 2 310 Kynar Coated not used with 612 101 110 and 612 101 112 300 Zine Plaicd Sioe 24 900 003 330 Washer Lock 2 ee Niokel Plated not used with 612 101 110 and 612 101 1 12 336 Zinc Plated Yellow Brass 25 612 023 330 Plate Outer 2 SAO S Nikel Piali 25A 612 101 110 Plate Outer 2 ook ieor Mode 203 40 Santoprene 25A 612 101 112 Plate Outer 2 hes Plk cecum 356 Hytrel 357 Injection Molded Polyurethane 358 Rupplon Urethane Rubber Color coded PURPLE Some Applications Compression Mold 359 Urethane Rubber 360 Buna N Rubber Color coded RED 361 Buna N 363 Viton Fluorel Color coded YELLOW 364 E P D M Rubber Color coded BLUE 365 Neoprene Rubber Color coded GREEN 370 Butyl Rubber Color coded BROWN 371 Philthane Tuftane 374 Carboxylated Nitrile 375 Fluorinated Nitrile List continued next page Models SB1 A amp SB25A Type 4 Page 6 520 146 000 1 04 ITEM TOTAL NO PARTNUMBER DESCRIPTION RQD 26 286 008 356 Diaphragm 2 286 008 354 Diaphragm 2 286 008 360 Diaphragm 2 286 008 363 Diaphragm 2 286 008 364 Diaphragm 2 286 008 365 Diaphragm 2 286 008 366 Diaphragm 2 27 612 022 330 Plate Inner Diaphragm 2 28 132 019 360 Bumper 2 29 196 0432. slide freely D Excessive air leakage in the pump can prevent cycling This condition will be evident Air leakage into the discharge line indicates a ruptured diaphragm Air leakage from the exhaust port indicates leakage in the air distribution valve See further service instructions E Blockage in the liquid chamber can impede movement of diaphragm 2 Pump cycles but will not pump A Suction side of pump pulling in air Check the suction line for air leaks and be sure that the end of the suction line is submerged Check flange bolting Check valve flanges and manifold to chamber flange joints B Make certain the suction line or strainer is not plugged Restriction at the suction is indicated by a high vacuum reading when a vacuum gauge is installed in the suction line C Check valves may not be seating properly To check remove the suction line and cover the suction port with your hand If the unit does not pull a good suction vacuum the check valves should be inspected for proper seating D Static suction lift may be too high Priming can be improved by elevating the suction and discharge lines higher than the check valves and pouring liquid into the unit through the suction inlet When priming at high suction lifts or with long suction lines operate the pump at maximum cycle rate 3 Low performance A Capacity is reduced as the discharge pressure increases as indicated on the performance curve Performance capability varies wit
3. 0 weight non detergent oil for every 20 SCFM of air the pump consumed at its point of operation Consult the pump s published Performance Curve to determine this Models SB1 A amp SB25A Type 4 Page 2 520 146 000 1 04 It is important to remember to inspect the sleeve and spool set routinely It should move back and forth freely This is most important when the air supply is lubricated If a lubricator is used oil accumulation will over time collect any debris from the compressed air This can prevent the pump from operating properly Water in the compressed air supply can create problems such as icing or freezing of the exhaust air causing the pump to cycle erratically or stop operating This can be addressed by using a point of use air dryer to supplement a plant s air drying equipment This device will remove excess water from the compressed air supply and alleviate the icing or freezing problem ESADS Externally Serviceable Air Distribution System Please refer to the exploded view drawing and parts list in the Service Manual supplied with your pump If you need replacement or additional copies contact your local Warren Rupp Distributor or the Warren Rupp factory Literature Department To receive the correct manual you must specify the MODEL and TYPE information found on the name plate of the pump The main air valve sleeve and spool set is located in the valve body mounted on the pump with four hex head capscrews The valve bod
4. 157 Chamber Inner left side 1 196 084 010 Chamber Inner left side 1 30 196 042 157 Chamber Inner right side 1 196 090 010 Chamber Inner right side 1 31 620 007 114 Plunger Actuator 2 32 560 001 360 O Ring 2 33 135 034 506 Bushing 2 34 675 042 115 Ring Retainer 2 35 170 043 330 Capscrew Hex Head AL center 6 170 006 330 Capscrew Hex Head Cl center 6 36 196 012 157 Chamber Outer 2 196 012 110 Chamber Outer 2 196 012 112 Chamber Outer 2 37 170 029 330 Capscrew Hex Head 16 38 545 004 330 Nut Hex 26 39 115 071 080 Foot Bracket 1 115 070 330 Foot Bracket top ported only 1 41 706 013 330 Screw Machine 4 42 350 002 360 Foot Rubber 4 43 547 002 330 Nut Stop 4 44 618 003 330 Plug Pipe 3 44A 618 003 330 Plug Pipe 2 618 003 110 Plug Pipe 2 618 003 112 Plug Pipe 2 45 132 022 360 Bumper Actuator 2 46 170 045 330 Capscrew Hex Head 4 47 360 031 379 Gasket 4 360 031 384 Gasket 4 360 031 608 Gasket 4 48 334 013 157 Flange Porting 2 334 013 110 Flange Porting 2 334 013 112 Flange Porting 2 334 036 110 Flange Porting 2 334 036 156 Flange Porting dual ported 2 334 013 157E Flange Porting BSP SB25 2 334 013 110E Flange Porting BSP SB25 2 334 013 112E Flange Porting BSP SB25 2 334 036 156E Flange Porting BSP SB25 2 334 036 110E Flange Porting BSP SB25 2 49 171 010 330 Capscrew Flanged 4 50 905 001 015 Washer Taper 4 51 360 030 425 Gasket Manifold 2 360 030 600 Gasket Manifold 2 52 900 004 330
5. SERVICE AND OPERATING MANUAL DEDA ANDPIPE A WARREN RUPP PUMP BRAND x u2aDbT5 CE PLEASE NOTE The photos shown in this manual are for general instruction only Your specific model may not be shown Always refer to the parts list and exploded view drawing for your specific model when installing disassembling or servicing your pump PRINCIPLE OF PUMP OPERATION This ball valve pump is powered by compressed air and is a 1 1 pressure ratio design It alternately pressurizes the inner side of one diaphragm chamber while simultaneously exhausting the other inner chamber This causes the diaphragms which are connected by a common rod to move endwise Air pressure is applied over the entire surface of the diaphragm while liquid is discharged from the oppo site side The diaphragm operates under a balanced condition during the dis charge stroke which allows the unit to be operated at discharge heads over 200 feet 61 meters of water head Since the diaphragms are connected by a common rod secured by plates to the center of the diaphragms one diaphragm performs the discharge stroke while the other is pulled to perform the suction stroke in the opposite chamber For maximum diaphragm life keep the pump as close to the liquid being pumped as possible Positive suction head in excess of 10 feet of liquid 3 048 meters is not recommended For applications with higher suction heads consult the factory Alternate pressuring and exhaus
6. Viton and Hytrel are registered tradenames of E l DuPont Gylon is a registered tradename of Garlock Inc Nylatron is a registered tradename of Polymer Corp Rulon Il is a registered tradename of Dixion Industries Corporation Hastelloy C is a registered tradename of Cabot Corp Ryton is a registered tradename of Phillips Chemical Company Valox is a registered tradename of General Electric Co Warren Rupp Rupplon SandPIPER PortaPump and Tranquilizer are registered tradenames of Warren Rupp Inc 520 146 000 1 04 Models SB1 A amp SB25A Page 7 ITEM TOTAL NO PARTNUMBER DESCRIPTION RQD Repair Parts shown in bold face darker type are more likely to need replacement 53A 170 047 330 Capscrew Hex Head re extended Bod of CRS ae They dual ported AL pump 3 are readily available from most Warren 170 084 330 Capscrew Hex Head Rupp distributors The pump owner may dual ported SS pump 3 prefer to maintain a limited inventory of 55 530 036 000 Muffler 1 these parts in his own stock to reduce 56 286 015 604 Diaphragm Overlay 2 repair downtime to a minimum 57 050 008 365 Check Ball 4 IMPORTANT When ordering repair parts 050 008 354 Check Ball 4 always furnish pump model number serial 050 008 356 Check Ball 4 number and type number 050 008 360 Check Ball 4 050 008 363 Check Ball 4 MATERIAL CODES 050 011 600 Check Ball 4 The Last 3 Digits of Part Number 58 51 8 006 1 56 Manifold 1 See listings on previous page
7. Washer Lock 10 53 170 047 330 Capscrew Hex Head 6 Repair Parts shown in bold face darker type are more likely to need replacement after extended periods of normal use They are readily available from most Warren Rupp distributors The pump owner may prefer to maintain a limited inventory of these parts in his own stock to reduce repair downtime to a minimum IMPORTANT When ordering repair parts always furnish pump model number serial number and type number MATERIAL CODES The Last 3 Digits of Part Number Continued from previous page 378 High density Polypropylene 379 Conductive Nitrile 384 Conductive Neoprene 405 Cellulose Fibre 408 Cork and Neoprene 425 Compressed Fibre 426 Blue Gard 440 Vegetable Fibre 465 Fibre 500 Delrin 500 501 Delrin 570 505 Acrylic Resin Plastic 520 Injection Molded PVDF Natural Color 540 Nylon 541 Nylon 542 Nylon 544 Nylon Injection Molded 550 Polyethylene 551 Polypropylene 552 Unfilled Polypropylene 553 Unfilled Polypropylene 555 Polyvinyl Chloride 558 Conductive HDPE 570 Rulon II 580 Ryton 590 Valox 591 Nylatron G S 592 Nylatron NSB 600 Virgin PTFE virgin material Tetrafluoroethylene F 601 Virgin PTFE Bronze and moly filled 602 Filled Virgin PTFE 603 Blue Gylon 604 Virgin PTFE 606 Virgin PTFE 608 Conductive PTFE 610 Virgin PTFE Encapsulated Silicon 611 Virgin PTFE Encapsulated Viton Delrin
8. ake certain that all bolting is in good condition and that all of the correct bolting is reinstalled during assembly A CAUTION A In the event of diaphragm rupture pumped material may enter the air end of the pump and be discharged into the atmosphere If pumping a product which is hazardous or toxic the air exhaust must be piped to an appropriate area for safe disposition A CAUTION A Before maintenance or repair shut off the compressed air line bleed the pressure and disconnect the air line from the pump The discharge line may be pressurized and must be bled of its pressure When used for toxic or aggressive fluids the pump should always be flushed clean prior to disassembly A WARNING A Take action to prevent static sparking Fire or explosion can result especially when handling flammable liquids The pump piping valves containers or other miscellaneous equipment must be grounded See page 5 A WARNING A The weight of the air supply line and of the filter must be supported by some means other than the air valve cap Failure to provide support may result in damage to the pump RECOMMENDED WARREN RUPP ACCESSORIES TO MAXIMIZE PUMP PERFORMANCE e Tranquilizer Surge Suppressor For nearly pulse free flow e Warren Rupp Filter Regulator For modular installation and service convenience e Warren Rupp Speed Control For manual or programmable process control Manual adjustment or 4 20mA r
9. ble from most Warren 2 360 058 360 Gasket Valve Cap 1 Rupp distributors The pump owner may 3 170 063 330 Capscrew Hex Head 1 prefer to maintain a limited inventory of 4 170 033 330 Capscrew Hex Head 4 these parts in his own stock to reduce 5 901 035 330 Washer Flat AL center 7 topair downtime tora minimum 901 035 330 Washer Flat CI center 1 IMPORTANT When ordering repair parts 900 005 330 Washer Lock CI center 6 always furnish pump model number serial 6 901 005 330 Washer Flat 4 numborarditype number 7 542 001 330 Nut Square 1 PEE aed 8 095 051 558 Body Spool Valve 1 me 9 031 039 000 Sleeve amp Spool Set 1 The Last 3 Digits of Part Number 10 165 038 356 Cap End 2 Se ee 11 675 043 115 Ring Retainer 2 ges ae 12 560 058 360 O Ring 8 015 Ductile Iron 13 360 057 360 Gasket 1 eee RA 14 095 074 000 Assembly Pilot Valve 1 ete ee vaiva Body l a e o 14 B 755 025 000 Sleeve without o ring 1 Polished 14 C 560 033 360 O Ring sleeve 4 S AD a 316 Stainless Steel Hand Polished 14 D 775 014 000 Spool without o ring 1 114 903 Stainless Beel 14 E 560 023 360 O Ring spool 4 117 440 C Stainless Steel Martensitic 14F 675 037 080 Retaining Ring E 15 360 056 379 Gasket 1 148 Hardcoat Anodized Aluminum 16 114 007 157 Bracket Intermediate 1 160 6061 T6 Aluminum 114 012 010 Bracket Intermediate 1 152 2024 T4 Aluminum 2023 1351 17 560 040 360 O Ring 2 185 or 186 386 T6 Aluminum 18 675 040 360 Ring Sealing AL center
10. eception For more detailed information on these accessories contact your local Warren Rupp Factory Authorized Distributor or Warren Rupp corporate headquarters Models SB1 A amp SB25A Type 4 Page 4 520 146 000 1 04 Grounding The Pump A warnine Take action to prevent static sparking Fire or explosion can result especially when handling flammable liquids The pump piping valves containers or other miscellaneous equipment must be grounded One eyelet is installed to a true earth ground Requires a maximum 5 16 or 8mm maximum diameter blot This 8 footlong 244 centimeters Ground Strap part number 920 025 000 can be ordered as a service item lt Cof A RaT a I J LA To reduce the risk of static electrical sparking this pump must be grounded Check the local electrical code for detailed grounding instruction and the type of equipment required or in the absence of local codes an industry or nationally recognized code having juristiction over specific installations 520 146 000 1 04 Models SB1 A amp SB25A Page 5 SERVICE AND OPERATING MANUAL lt Model SB1 A SANDPIPER E cons CE Model SB25A Type 4 ne PARTNUMBER DESCRIPTION Sle Repair Parts shown in bold face darker type are more likely to need replacement 1 165 042 157 Cap Valve Body AL center 1 after extended periods of normal use They 165 042 558 Cap Valve Body CI center 1 are readily availa
11. edule to do so on a regular basis This practice should include cleaning the spool and sleeve components with a safety solvent or equiva lent inspecting for signs of wear or damage and replacing worn components To re install the sleeve and spool set lightly lubricate the o rings on the sleeve with an o ring assembly lubricant or lightweight oil such as 10 wt air line lubricant Re install one end cap and retaining ring see safety warning on the valve body Using the arbor press or bench vise that was used in disassembly carefully press the sleeve back into the valve body without shearing the o rings Re install the spool opposite end cap and retaining ring See safety warning on the valve body After inspecting and cleaning the gasket surfaces on the valve body and intermediate reinstall the valve body on the pump using new gaskets Tighten the four hex head capscrews evenly and in an alternating cross pattern at 150 in Ibs 16 94 Newton meters PILOT VALVE The pilot valve assembly is accessed by removing the main air distribution valve body from the pump and lifting the pilot valve body out of the intermediate housing Most problems with the pilot valve can be corrected by replacing the o rings Always grease the spool prior to inserting it into the sleeve If the sleeve is removed from the body reinsertion must be at the chamfered side Grease the o rings to slide the sleeve into the valve body Securely insert the retaining ri
12. ents are used in pressurized fluid systems having Aluminum or Galvanized wetted parts Death serious bodily injury and or property damage could result Consult with the factory if you have questions concerning Halogenated Hydrocarbon solvents Air inlet WARREN RUPP INC A Unit of IDEX Corporation P O Box 1568 Mansfield Ohio 44901 1568 USA e 419 524 8388 Fax 419 522 7867 www warrenrupp com increases cycling rate but does not increase flow rate cavitation has occurred and the valve should be closed slightly For the most efficient use of compressed air and the longest diaphragm life throttle the air inlet to the lowest cycling rate that does not reduce flow AIR EXHAUST If a diaphragm fails the pumped liquid or fumes can enter the air end of the pump and be exhausted into the atmosphere When pumping hazardous or toxic materials pipe the exhaust to an appropriate area for safe disposition This pump can be submerged if materials of construction are compatible with the liquid The air exhaust must be piped above the liquid level Piping used for the air exhaust must not be smaller than 1 2 54 cm Reducing the pipe size will restrict air flow and reduce pump performance When the product source is at a higher level than the pump flooded suction pipe the exhaust higher than the product source to prevent siphoning spills Freezing or icing up of the air exhaust can occur under certain temperature and humid
13. h available inlet air supply Check air pressure at the pump inlet when the pump is operating to make certain that adequate air supply is maintained B Check vacuum at the pump suction Capacity is reduced as vacuum increases Reduced flow rate due to starved suction will be evident when cycle rate can be varied without change in capacity This condition will be more prevalent when pumping viscous liquids When pumping thick heavy materials the suction line must be kept as large in diameter and as short as possible to keep suction loss minimal C Low flow rate and slow cycling rate indicate restricted flow through the discharge line Low flow rate and fast cycling rate indicate restriction in the suction line or air leakage into suction D Unstable cycling indicates improper check valve seating on one chamber This condition is confirmed when unstable cycling repeats consistently on alternate exhausts Cycling that is not consistently unstable may indicate partial exhaust restriction due to freezing and thawing of exhaust air Use of an air dryer should solve this problem For additional information see the Warren Rupp Troubleshooting Guide WARRANTY This pump is warranted for a period of five years against defective material and workmanship Failure to comply with the recommendations stated in this manual voids all factory warranty A IMPORTANT amp This pump is pressurized internally with air pressure during operation Always m
14. hnical File is stored at KEMA Notified Body 0344 under document number 203040000 Manufacturer Applicable Standard Warren Rupp Inc 94 9 EC 800 North Main Street For potentially explosive environments P O Box 1568 Group l Category M2 Mansfield OH 44902 USA Group II Category 2 GD Models Air Operated Double Diaphragm Metallic Pumps Series G SA SB S ST and U under SANDPIPER and MARATHON Brands DPIPER MARATHON A WARREN RUPP PUMP BRAND A WARREN RUPP PUMP BRAND DATE APPROVAL ITITLE 8 May 2003 Jason Awad VP Engineering Rev B 23 October 2003
15. iaphragm Install the heavier plate on the outside of the diaphragm and make certain that the large radius side of both plates are toward the diaphragm Place the sealing washer between the inner diaphragm plate and the end of the rod Tighten the capscrew to approximately 25 ft Ibs 33 9 Newton meters Torque while allowing diaphragm to turn freely with plates Except for EPDM Rubber use a lightweight oil between plates and diaphragm when doing this procedure Use a wrench on the capscrew of the opposite side to keep the rod from rotating If the opposite chamber is assembled the rod need not be held When reassembling the outer chambers and the manifold the bolts securing the manifold flange to the chamber should be snugged prior to tightening the chamber bolts to insure that the chamber port flange is square with the manifold flange Finish tightening the manifold flange bolts after chamber bolting is secured AIR VALVE LUBRICATION The SandPIPER pump s pilot valve and main air valve assemblies are designed to operate WITHOUT lubrication This is the preferred mode of operation There may be instances of personal preference or poor quality air supplies when lubrication of the compressed air supply is required The pump air system will operate with properly lubricated compressed air supplies Proper lubrication of the compressed air supply would entail the use of an air line lubricator available from Warren Rupp set to deliver one drop of 1
16. ity conditions Use of an air dryer should eliminate most icing problems BETWEEN USES When used for materials that tend to settle out or transform to solid form the pump should be completely flushed after each use to prevent damage Product remaining in the pump between uses could dry out or settle out This could cause problems with valves and diaphragms at re start In freezing temperatures the pump must be drained between uses in all cases CHECK VALVE SERVICING Need for inspection or service is usually indicated by poor priming unstable cycling reduced performance or the pump s cycling but not pumping Remove the six flange bolts securing the inlet and outlet flanges to the manifold Inspect the surfaces of both check valve and seat for wear or damage that could prevent proper sealing If pump is to prime properly valves must seat air tight DIAPHRAGM SERVICING Remove the four bolts securing the manifold flange to the chamber Remove the eight nuts securing the outer diaphragm chamber flange and remove the chamber Loosen the capscrew securing the diaphragm and plate to the rod by leaving the diaphragm engaged with the capscrews around the outer flange preventing rotation of the rod DO NOT USE A WRENCH ON THE DIAPHRAGM ROD FLAWS ON THE SURFACE MAY DAMAGE BEARINGS AND SEAL During reassembly make certain that the rubber bumper is on the rod on each side Install the diaphragm with the natural bulge outward as indicated on the d
17. nd is ready for operation It is completely self priming from a dry start for suction lifts of 10 15 feet 9 14 meters or less For suction lifts exceeding 15 feet of liquid fill the chambers with liquid prior to priming AIR SUPPLY Air supply pressures cannot exceed 125 psi 8 61 bar Connect the pump air inlet to an air supply of sufficient capacity and pressure required for desired performance When the air line is solid piping use a short length of flexible hose not less than 3 4 19mm in diameter between pump and piping to eliminate strain to pipes AIR INLET amp PRIMING For start up open an air valve approximately 1 2 to 3 4 turn After the unit primes an air valve can be opened to increase flow as desired If opening the valve Model SB1 A Model SB25A Type 4 A IMPORTANT amp Read these instructions completely before installation and start up It is the responsibility of the purchaser to retain this manual for reference Failure to comply with the recommendations stated in this manual will damage the pump and void factory warranty ABEFORE OPERATIONA Before pump operation inspect all gasketed fasteners for looseness caused by gasket creep Retorque loose fasteners to prevent leakage Follow recommended torques stated in the card attached to the new pump A HAZARD WARNING A POSSIBLE EXPLOSION HAZARD can result if 1 1 1 Trichloroethane Methylene Chloride or other Halogenated Hydrocarbon solv
18. ng around the sleeve When reinserting the pilot valve push both plungers located inside the intermediate bracket out of the path of the pilot valve spool ends to avoid damage PILOT VALVE ACTUATOR Bushings for the pilot valve actuators are held in the inner chambers with retaining rings An o ring is behind each bushing If the plunger has any sideways motion check o rings and bushing for deterioration or wear The plunger may be removed for A SAFETY WARNING A To assure proper pump function and safe installation of the retain ing ring check the gap G dimension for full installation into the valve body grooves gt 232 G Dimensions between lugs 520 146 000 1 04 Models SB1 A amp SB25A Page 3 inspection or replacement First remove the air distribution valve body and the pilot valve body from the pump The plungers can be located by looking into the intermediate It may be necessary to use a fine piece of wire to pull them out The bushing can be turned out through the inner chamber by removing the outer chamber assembly Replace the bushings if pins have bent SERVICE INSTRUCTIONS TROUBLE SHOOTING 1 Pump will not cycle A Check to make sure the unit has enough pressure to operate and that the air inlet valve is open B Check the discharge line to insure that the discharge line is neither closed nor blocked C It the spool in the air distribution valve is not shifting check the main spool It must
19. s 518 006 110 Manifold 1 518 006 112 Manifold 1 59 722 026 580 Seat Check Ball 2 use with elastomer balls 722 047 110 Seat Check Ball 2 use with PTFE amp Santoprene balls 722 047 112 Seat Check Ball 2 use with PTFE amp Santoprene balls 60 545 005 330 Nut Hex SS units only 4 61 255 012 335 Coupling 3 4 NPT Exhaust Port 1 Items Not Shown 031 030 558 Valve Body Assembly 1 Includes Items 8 9 10 11 12 amp 40 535 022 115 Name Plate AL outer chamber only 2 705 001 330 Drive Screw AL outer chamber only 4 Optional Item 800 008 000 Strainer AL only 1Available in kit form Order P N 031 060 000 which also includes items 2 13 15 31 amp 45 Available in kit form Air End Kit 476 103 000 Wet End Kits for SB1 A amp SB25A Kit Number Pump Type 476 034 354 476 034 356 SR 476 034 360 SB 476 034 363 SV 476 034 365 SN 476 034 633 SC 476 034 634 SH 476 034 635 SGN 476 034 638 SGR Models SB1 A amp SB25A Type 4 Page 8 520 146 000 1 04 2004 Warren Rupp Inc All rights reserved Warren Rupp SandPIPER and Tranquilizer are registered tradenames of Warren Rupp Inc Neverseize is a registered tradename of Loctite Printed in U S A 520 146 000 1 04 Models SB1 A amp SB25A Page 9 WARREN RUPP IDEX CORPORATION Declaration of Conformity ATEX 100a In accordance with Directive 94 9 EC Annex VIII Equipment intended for use in potentially explosive environments Tec
20. ting of the diaphragm chamber is performed by means of an externally mounted pilot operated four way spool type air distribution valve When the spool shifts to one end of the valve body inlet air pressure is applied to one diaphragm chamber and the other diaphragm chamber exhausts When the spool shifts to the opposite end of the valve body the porting of chambers is reversed The air distribution valve spool is moved by an internal pilot valve which alternately pressurizes one side of the air distribution valve spool while exhausting the other side The pilot valve is shifted at each end of the diaphragm stroke by the diaphragm plate coming in contact with the end of the pilot valve spool This pushes it into position for shifting of the air distribution valve The chambers are manifolded together with a suction and discharge check valve for each chamber maintaining flow in one direction through the pump INSTALLATION amp START UP Locate the pump as close to the product being pumped as possible keeping suction line length and number of fittings to a minimum Do not reduce line size For installations of rigid piping short flexible sections of hose should be installed between pump and piping This reduces vibration and strain to the piping system A Warren Rupp Tranquilizer surge suppressor is recommended to further reduce pulsation in flow Tighten all fasteners before pump startup This pump was tested at the factory prior to shipment a
21. y assembly is removed from the pump by removing these four hex head capscrews With the valve body assembly off the pump access to the sleeve and spool set is made by removing a retaining ring each end securing the end cap on the valve body assembly With the end caps removed slide the spool back and forth in the sleeve The spool is closely sized to the sleeve and must move freely to allow for proper pump operation An accumulation of oil dirt or other contaminants from the pump s air supply or from a failed diaphragm may prevent the spool from moving freely This can cause the spool to stick in a position that prevents the pump from operating If this is the case the sleeve and spool set should be removed from the valve body for cleaning and further inspection Remove the spool from the sleeve Using an arbor press or bench vise with an improvised mandrel press the sleeve from the valve body Take care not to damage the sleeve At this point inspect the o rings on the sleeve for nicks tears or abra sions Damage of this sort could happen during assembly or servicing A sheared or cut o ring can allow the pump s compressed air supply to leak or bypass within the air valve assembly causing the pump to leak compressed air from the pump air exhaust or not cycle properly This is most noticeable at pump dead head or high discharge pressure conditions Replace any of these o rings as required or set up a routine preventive maintenance sch
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