Contents
1. 016 506 Bushing Threaded 2 oo one Melee Iron 13 560 001 360 O Ring 2 080 CarbonSiteel AISI B 1112 14 165 011 157 Cap Valve Body 2 S ey s sss AllO e ainiess otee 15 165 047 010 Cap Cylinder 1 111 _Alloy Type 316 Stainless Steel Electro 16 170 024 330 Capscrew Hex Head Cl 2 a 170 024 330 Capscrew Hex Head SS 4 113 Alloy Type 316 Stainless Steel Hand 17 170 032 330 Capscrew Hex Head 8 is exe Sisal 18 170 045 330 Capscrew Hex Head 4 115 302 304 Stainless Steel B 19 170 050 330 Capscrew Hex Head 2 120 416 Stainless Steel Wrought Martensitic 20 170 052 330 Capscrew Hex Head GH2 Cl 6 el ee ronan Martensitic 170 066 330 Capscrew Hex Head GH2 SS 4 a aa 21 170 057 330 Capscrew Hex Head GH2 only 6 h ee 22 170 060 330 Capscrew Hex Head 8 152 2024 T4 Aluminum 2023 1351 23 275 009 331 Cylinder 2 154 Almag 35 Aluminum 24 326 003 080 Foot Mounting I 157 Die Gast Aluminum Alloy 380 25 360 010 360 Gasket End Cap 2 eg eet oe 26 360 041 379 Gasket Valve Body 1 162 Brass Yellow Screw Machine Stock 27 360 048 360 Gasket Valve Body 1 8 1 s 28 426 047 000 Hose Assembly 2 170 Bronze Bearing Type Oil Impregnated 29 426 048 000 Hose Assembly 1 rag aioe eae 30 920 025 000 Ground Strap 1 aes Sas Se Zes rome Fiate ee 31 945 007 330 Nut Hex Cl 18 332 Electroless Nickel Plated 007 335 Galvanized Steel 045 007 330 Nut Hex SS 20 336 Zine Plated Yellow Brass 32 547 009 080 Nut Loc2. high will result in excessively rapid and noisy operation with a loss in performance and eventually shortened pump life The hose assemblies deliver natural gas to the non wetted portions of the pump and care should be taken that they are neither crimped nor cut INSTALLATION PROCEDURES Position the pump as close as possible to the source of the liquid to be pumped Avoid long or undersize suction lines and use the minimum number of fittings For permanent installation involving rigid piping install short flexible sections of hose between the pump and piping This reduces strains and permits easier removal of the pump for service when required Important The pump must be installed on a flat level surface Use shims as neccessary NATURAL GAS SUPPLY Do not connect the unit to a natural gas supply in excess of 125 PSI 8 61 bars Install a shutoff valve in the gas supply line to permit removal of the unit for servicing When connecting a gas supply of rigid piping mount a section of flexible line to the pump to eliminate piping strain In permanent installations a gas filter is recommended FREEZING OR ICING OF EXHAUST Icing of the gas exhaust can occur under certain conditions of temperature and humidity on compressed gas power equipment Icing is more likely to occur at high discharge pressures MAINTENANCE AFTER USE When the pump is used for materials that tend to settle out or transform from liquid to solid form care must
3. or gouges it will require replacement Remove seal and back up spacer Remove wear rings and carefully inspect for wear During reassembly make sure the ends of the back up spacer and wear ring end are not across from each other WET SIDE The wet side piston has a yellow PSP seal Inspect for flat spots and gouges Behind the seal is an energizer ring that helps to load the seal against the cylinder wall The energizer ring is included with the new seal The wear rings are the same as on the air side Again make sure the ends are not across from each other Reassembly of both pistons is the opposite of removal Make sure the side of the locknut with the seal is next to the piston The groove in the piston or o ring item 35 must be toward the pump center o ring seals next to the rod Apply a heavy oil to the piston seals when sliding on the cylinder The piston nut should be torqued at 500 in lbs 56 49 Newton meters The studs that secure the cylinders to the intermediate should be torqued at 250 in lbs 28 24 Newton meters IMPORTANT NOTE Reas sembly of the wet side piston seal assembly differs from the gas side in that it must be carefully pressed into the cylinder An arbor press is commonly used for this purpose NATURAL GAS VALVE LUBRICATION The SandPIPER pump s pilot valve and main gas valve assemblies are designed to operate WITHOUT lubrication This is the preferred mode of operation There may be instances of personal p
4. pressure conditions Replace any of these o rings as required or set up a routine preventive maintenance schedule to do so on a regular basis This practice should include cleaning the spool and sleeve components with a safety solvent or equivalent 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 gas line lubricant Press the set into the valve body easily without shearing the o rings Re install one end cap gasket and bumper on the valve body Using the arbor press or bench vise that was used in disassembly press the sleeve back into the valve body You may have to clean the surfaces of the valve body where the end caps mount Material may remain from the old gasket Old material not cleaned from this area may cause air leakage after reassembly Take care that the bumper stays in place allowing the sleeve to press in all the way Reinstall the spool the opposite end cap gasket and bumper 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 PILOT VALVE ACTUATOR SERVICING The bushings for the pilot valve actuators are threaded into the intermedi ate bracket from the outside The plunger ma
5. static sparking Fire or explosion can result especially when handling flammable liquids The pump piping valves containers or other miscellaneous equipment must be grounded WARREN RUPP IDEX AODD Inc A Unit of IDEX Corporation 800 N Main St P O Box 1568 Mansfield Ohio 44901 1568 USA Telephone 419 524 8388 Fax 419 522 7867 www warrenrupp com gh2dl1sm REV0714 Model GH2 Page 1 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 DIAPHRAGM SERVICING FILLING DRIVER FLUID Motive power is delivered to the single diaphragm of the pump through a fluid cell located between the diaphragm and the drive piston During preventative maintenance servicing where the diaphragm has not ruptured and the fluid cell is still filled the fluid should be drained from the chamber by removing the pipe plug in the lower most portion of inner chamber item 54 To fill the fluid cell the piston s must be on full discharge stroke To do this and hold during fill procedure remove item 46 fitting from the cylinder cap item 15 and insert gas pressure This need not be more than 10 PSI This will move the piston s and hold them in the discharge position Remove the pipe plug at the top of the fluid chamber and fill the chamber with ethylene glycol anti freeze The chamber will take 3000 ml 101 5 fluid ou
6. suction line or gas leakage into suction For more information refer to the Warren Rupp Troubleshooting Guide WARRANTY This unit is guaranteed for a period of five years against defective material and workmanship Model GH2 Page 4 gh2dl1sm REV0714 SERVICE AND OPERATING MANUAL Model GH2 High Pressure 1 2 ratio Type 1 WARREN RUPP SANDPIPER A WARREN RUPP INC BRAND FLUID amp METERING Designed to meet CSA Requirement 2 01 US for Natural Gas Operated Diaphragm Pumps ITEM TOTAL Repair Parts shown in bold face darker NO PART NUMBER DESCRIPTION RQD type are more iKey to need replacement I 008013080 Adapter E e s ele etc meguiator wiGauge Rupp suis The pump owner may 3 031 012 000 Sleeve amp Spool Set 1 asa f 4 095 115 001 Assembly Pilot Valve 1 Aa i dagen x mie spo ed 4 B 755 025 001 Sleeve without o ring 1 Boe eee F 4 C 560 033 379 O Ring Sleeve 4 repair downtime to a minimum 4 D 775 026 001 Spool without o ring 1 IMPORTANT When ordering repair parts 4 E 560 023 379 O Ring Spool 2 always furnish pump model number serial 4 F 675 037 080 Retaining Ring 1 number and type number 5 095 040 156 Valve Body 1 6 114 027 010 Bracket Intermediate 1 7 070 006 571 H Bearing Sleeve 2 MATERIAL CODES 8 115 164 000 Bracket 1 The Last 3 Digits of Part Number _ 9 115 067 080 Mounting Bracket Assembly 1 ee A 10 132 002 360 Bumper Diaphragm 2 010 Cast Iron 11 132 014 358 Bumper Spool 2 ee 12 135
7. ANT 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 375 Fluorinated Nitrile 378 High density Polypropylene 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 570 Rulon Il 580 Ryton 590 Valox 591 Nylatron G S 592 Nylatron NSB 600 Virgin PTFE 601 Virgin PTFE Bronze and moly filled 602 Filled PTFE 603 Blue Gylon 604 Virgin PTFE 606 Virgin PTFE 610 PTFE Encapsulated Silicon 611 PTFE Encapsulated Viton Delrin and Hytrel are registered tradenames of E I 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 Ryton is a registered tradename of Phillips Chemical Company Valox is a registered tradename of General Electric Company SANDPIPER PortaPump Tranquilizer SludgeMaster and Warren Rupp are registered tradenames of IDEX AODD Inc Model GH2 Page 6 gh2dl1sm
8. IYM pny Jaap IW 008Z luo sn e10N nueu siy JO uolj529s ONIOIAYAS WOVYHdVIC 94 u palyioeds SE 99 PIN Ou Il 3 S19 OW UOJMEN 2 7G sqi Ov ye nbiol 29 w JOYSeM YOO y Buiziyn 89 w JNU x u y 0 l eld 1 1no y nbiol uAous Se swpeydeip ouewoseja pue FJ4ld 24 yoimpues ajoy 191u 5 s upeirydep au Bnid 0 pesn q ysnw 99 w ejd Jouul pue g9 w a ejd Ja no ue p uinb i SI yg w WHesydelp 441d 94 u u A INOVYHAVIG 34Ld U dO ASN WARREN RUPP INC Declaration of Conformity Manufacturer Warren Rupp Inc 800 N Main Street Mansfield Ohio 44902 USA certifies that Air Operated Double Diaphragm Pump Series HDB HDF M Non Metallic S Non Metallic M Metallic S Metallic T Series G Series RS Series U Series EH and SH High Pressure W Series SMA and SPA Submersibles and Tranquilizer Surge Suppressors comply with the European Community Directive 2006 42 EC on Machinery according to Annex VIII This product has used Harmonized Standard EN809 1998 A1 2009 Pumps and Pump Units for Liquids Common Safety Requirements to verify conformance Laud Fewer October 20 2005 Signature of authorized pergon Date of issue David Roseberry Engineering Manager Printed name of authorized person Title Revision Level F sae Date of revision C FLUID amp METERING
9. REV0714 AVAILABLE REPAIR PART KITS ITEM NO PART NUMBER DESCRIPTION gt gt 476 242 000 Repair Parts Kit for EH2 476 048 360 476 048 363 476 048 633 476 048 649 476 056 649 476 056 360 476 056 633 Conversion Kit 475 243 000 GAS END KIT Gaskets O Rings Seals Gas Valve Sleeve and Spool Set Pilot Valve Assembly WETTED END KIT CI Only Viton Diaphragm Check Balls and O Rings Carbon Steel Seats WETTED END KIT CI Only Viton Diaphragm and Check Balls PTFE O Rings Carbon Steel Seats WETTED END KIT CI Only Viton Diaphragm PTFE Check Balls and O Rings Carbon Steel Seats WETTED END KIT CI Only Buna Backup Diaphragm PTFE Overlay Diaphragm and O Rings Carbon Steel Seats WETTED END KIT SS Only Buna Backup Diaphragm PTFE Overlay Diaphragm Check Balls and O Rings Stainless Steel Seats WETTED END KIT SS Only Buna Diahragm Check Balls and O Rings Stainless steel Seats WETTED END KIT SS Only Viton Diaphragm PTFE Check Balls and O Rings Stainless Steel Seats CONVERT EH2 TO GH2 Natural Gas Valve Pilot Valve Intermediate Bracket Sleeve Bearings Natural Gas Regulator Hoses Fittings gh2dl1sm REV0714 Model GH2 Page 7 70 1 8 Bed ZH IPPON WSN u p luld OUI GGOV xaql Jo s uieu pe1 peseisibe ave Jeziinbues pue yad qpues ddny U uUEA AGO peAsasal S YBU Ily OU GGOV XAGI 600ZO ONIDIAYAS WOVYHd VIC 89S 441d USN U
10. Valve CI Only Ball Check Valve CI Only Ball Check Valve CI Only Ball Check Valve SS Only Ball Check Valve SS Only Bracket Mounting GH2 Cl Only Bracket Mounting GH2 SS Only Chamber Inner Chamber Outer Chamber Outer Diaphragm Diaphragm 90 Street Elbow CI Only 90 Street Elbow SS Only Flange Suction Flange Suction Flange Discharge Flange Discharge Plug Pipe Cl Only Plug Pipe SS Only Seat Check Valve SS Only Seat Check Valve CI Only O Ring Cl Only O Ring Cl Only O Ring SS Only O Ring SS Only Seal SS Only Plug Pipe Foot SS Only Fitting For models with PTFE overlay pumping diaphragm 63 64 65 66 67 68 Not Shown 612 097 110 612 039 010 286 020 604 286 005 360 612 047 330 900 007 330 545 009 330 545 008 330 900 003 330 Plate Diaphragm Outer Plate Diaphragm Outer Diaphragm Diaphragm Plate Diaphragm Inner Washer Lock Nut Hex Nut Hex SS Only Washer Lock SS Only P PE HR HR HDR P N HH HSH HS POD N DN N o ro 5 k L L L L L L 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 War ren 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 IMPORT
11. WARREN RUPP FLUID amp METERING SANDPIPER A WARREN RUPP INC BRAND PRINCIPLE OF OPERATION This pump is a 2 1 pressure ratio single acting pump powered by compressed natural gas The 2 1 ratio is achieved by simultaneously applying gas pressure over a single end of each of two pistons connected in series by a shaft The two pressurized ends are those most distant from the pumped fluid with the force from the gas pressure exerted in the direction of the pumped fluid The combined force is transferred through to the single end of the piston nearer to the pumped fluid the single piston end having an area equal to one half that of the two gas ends and then through a fluid cell to a single pumping diaphragm On this single acting pump the suction stroke is independent of all discharge conditions and requires less gas pressure than the discharge stroke The suc tion stroke is accomplished through a natural gas regulator which pressur izes the piston area in the rear cylinder adjacent to the intermediate bracket while simultaneously exhausting the other two piston areas one in the front cylinder adjacent to the intermediate bracket and the other behind the rear cylinder piston adjacent to the cap end OPERATION The regulator is factory preset to 30 psi After the pump is installed and in operation the operator should raise or lower the setting until maximum performance is determined by trial and error A setting which is too
12. be taken after each use or during idle time to remove them and flush the pump as required to prevent damage In freezing temperatures the pump must be completely drained when idle This model must be tilted to allow the liquid from the chambers to run out of the discharge port SERVICE AND OPERATING MANUAL Model GH2 High Pressure 1 2 ratio Type 1 Designed to meet CSA Requirement 2 01 US for Natural Gas Operated Diaphragm Pumps IMPORTANT Read these safety warnings and instructions in this manual completely before installation and start up of the pump 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 CAUTION Before pump operation inspect all gasketed fasteners for looseness caused by gasket creep Re torque loose fasteners to prevent leakage Follow recommended torques stated in this manual Aa WARNING Before maintenance or repair shut off the com pressed 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 A WARNING In the event of diaphragm rupture pumped material may enter the air end of the pump and be discharged into the atmosphere The air exhaust must be piped to an appropriate area for safe disposition WARNING Take action to prevent
13. k 2 337 Silver Plated Steel 33 560 020 360 O Ring 6 ee 34 560 022 360 O Ring 5 354 Injection Molded 203 40 Santoprene 35 560 076 360 O Ring a 36 605 012 151 Piston 2 356 Hytrel 37 618 007 330 Plug Pipe 1 ea ila 38 620 011 114 Plunger Actuator 2 Sater peng EE SED 39 685 043 120 Rod Connecting 1 oo ia 2 E 2 Sa eae oer toe 41 A 720 022 360 T Seal with 2 backups 1 365 Neoprene Rubber Color coded GREEN 41 B 720 034 000 PSP Seal with energizer 1 970 Butyl Rubber Color coded BROWN 371 Philthane Tuftane 42 677 001 542 Wear Ring 4 List continued next page 43 807 047 080 Stud 8 44 866 073 330 Connector Male 2 gh2dlism REV0714 Model GH2 Page 5 ITEM NO 45 46 47 48 49 50 52 53 54 55 56 57 58 59 60 61 62 69 70 71 PART NUMBER 866 074 330 866 075 330 900 001 330 900 004 330 900 006 330 132 022 360 901 005 330 050 005 360 050 005 363 050 010 600 050 017 360W 050 018 600 115 064 080 115 072 080 196 029 015 196 053 010 196 047 110 286 036 360 286 036 363 312 046 020 312 046 110 334 038 010 334 044 110 334 039 010 334 043 110 618 003 330 618 003 110 722 040 110 722 042 080 560 079 360 560 079 611 560 106 360 560 106 363 720 060 608 618 003 110 326 006 080 866 076 330 DESCRIPTION Fitting Fitting Washer Lock Washer Lock Washer Lock CI Models SS Models Bumper goes to head of item 38 Washer Flat GH2 only Ball Check
14. lve sleeve and spool set is located in the valve body mounted on the pump with four hex head capscrews The valve body 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 four hex head capscrews each end on the end caps of 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 gas sup ply 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 abrasions Damage of this sort could happen during assembly or servicing A sheared or cut o ring can allow the pump s compressed gas supply to leak or bypass within the valve assembly causing the pump to leak compressed gas from the pump exhaust or not cycle properly This is most noticeable at pump dead head or high discharge
15. nces of fluid If the diaphragm is PTFE use 2800 ml 95 fluid ounces Tiltthe pump to evacuate air pockets from the fluid chamber A box wrench can be used to flex the diaphragm and purge air from the fluid chamber Fill the chamber to the top of the fill hole and re insert the pipe plug using thread compound If the glycol cell fluid is not compatible with the pumped product or would form a potentially dangerous mixture if the diaphragm ruptured consult the factory before choosing an alternative fluid CYLINDER PISTON SERVICING The driver fluid must be drained see above to service the cylinder piston The piston seals are different on the natural gas side versus the driver fluid side Typically the fluid side will require replacement before the gas side Remove the nuts and washers that secure the gas side piston cap and inner fluid chamber to the inter mediate bracket The cylinders may now be removed Inspect the cylinder wall carefully Scratches can cause driver fluid to leak to the gas side of the pump which can find its way to the exhaust muffler Scratches on the gas cylinder will cause too much gas to leak when on pressure stroke The locknuts holding the cylinder to the rod can now be removed Carefully inspect the piston for scratches burrs and wear especially if the piston seals are worn The piston seals can now be inspected or replaced NATURAL GAS SIDE The gas side piston has a T Seal If the seal is worn showing flat areas
16. reference or poor quality gas supplies when lubrication of the compressed natural gas supply is required The pump gas system will operate with properly lubricated compressed gas supplies Proper lubricatrion of the compressed gas supply would entail the use of a natural gas line lubricator set to deliver one drop of 10 wt non detergent oil for every 20 SCFM of gas the pump consumed at its point of operation Consult the pump s published performance curve to determine this It is important to remember to inspect the sleeve and spool set routinely It should A WARNING Do not smoke near the pump or use the pump near an open flame Fire or explosion could result WARNING This pump must not be used for fluid transfer into aircraft A WARNING This pump is pressurized internally with natural gas pressure during operation Always make certain that all bolting is in good condition and that all of the correct bolting is reinstalled during assembly AWARNING When used for toxic or aggressive fluids the pump should always be flushed clean prior to disassembly WARNING Before doing any main tenance on the pump be certain all pressure is completely vented from the pump suction discharge piping and all other openings and connections Be certain the natural gas supply is locked out or made non operational so that it cannot be started while work is being done on the pump Be certain that appro
17. ugged Restriction at the suc tion 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 life 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 Performance capability varies with available inlet supply Check gas pressure at the pump inlet when the pump is operating to make certain that adequate gas 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 material 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
18. ved eye protection and protective clothing are worn all times in the vicinity of the pump Failure to follow these recommendations may result in serious injury or death A WARNING Airborne particles and loud noise hazards Wear ear and eye protection Pump complies with EN809 Pumping Directive Directive 98 37 EC Safety of Machinery Model GH2 Page 2 gh2dl1sm REV0714 move back and forth freely This is most important when the gas supply is lubricated If a lubricator is used oil accumulation will over time collect any debris from the com pressed gas This can prevent the pump from operating properly Water in the compressed gas supply can create problems such as icing or freezing of the exhaust gas causing the pump to cycle erratically or stop operating This can be addressed by using a point of use dryer to supplement a plant s gas drying equipment This device will remove excess water from the compressed gas supply and alleviate the icing or freezing problem ESGDS Externally Serviceable Gas 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 Main Natural Gas Valve The main natural gas va
19. y be removed for inspection or replacement from the inside by removing the natural gas distribution valve body and the pilot valve body from the pump The plungers should be visible as you look into the intermediate from the top Depending on their position you may find it necessary to use a fine piece of wire to pull them out Under rare circumstances it may become necessary to replace the o ring seal The bushing can be pushed through the inner chamber by removing the outer chamber the assembly to reach the bushing TROUBLE SHOOTING gh2dl1sm REV0714 Model GH2 Page 3 1 Pump will not cycle A Check to make sure the unit has enough pressure to operate and that the gas inlet valve is open B Check the discharge line to insure that the discharge line is neither closed nor blocked C If the spool in the gas distribution valve is not shifting check the main spool It must slide freely D Excessive gas leakage in the pump can prevent cycling Natural Gas leakage from the exhaust port indicates leakage in the gas distribution valve See further ser vice 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 gas leaks and be sure that the end of the suction line is submerged Check flange bolting Check valve flanges and manifolds to chamber flange joints B Make certain the suction line or strainer is not pl
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