1" Air-Powered Diaphragm Pump - Series "
Contents
1. t 86252 Air End Repair Kit All Models 86244 Hytrel Wet End Repair Kit Models 84852 amp 84856 86245 Teflon Wet End Repair Kit Model 84853 E 86237 Buna N Wet End Repair Kit Model 84855 ae pemon Body spool valve Sleeve amp spool set O ring Cap end Ring retainer Cap valve body Gasket Gasket Gasket Pilot valve assembly Capscrew hex head Washer flat Nut square Capscrew hex head Washer flat Capscrew hex head Bracket intermediate Chamber diaphragm Chamber diaphragm Oring O ring Bushing Ring retainer Plunger actuator Bumper Bearing sleeve Seal u cup Nut hex Washer sealing Chamber outer Ring sealing Rod diaphragm Bumper Plate outer diaphragm Plate inner diaphragm Diaphragm Capscrew hex head Capscrew hex head Ball retainer cap Oring O ring O ring Spacer ring Ball check valve Seat check valve Capscrew hex head Foot mounting Capscrew flat head Pipe plug Spring Diaphragm overlay Muffler Stud Manifoid Washer flat not shown Washer flat Manifold Dual Manifold ORQNA A AAN SERVICE PARTS AHR RANA NDIAADANDARAARAARBRANNNNANNNANNNNNNNN AAA READ AAA HYN DAA Part Number Model Model Model Model 84852 84853 84855 84856 240695 240695 240695 240695 240705 240706 240707 240707 240708 240708 243563 22. feet 61 meters of water head Alternate pressurizing and exhaust ing of the diaphragm chamber is per formed by an externally mounted pilot operated four way spool type air distri bution valve When the spool is at one end of the valve body inlet air pressure is connected to one diaphragm cham ber and the other diaphragm chamberis connected to the exhaust When the spool is moved to the opposite end of the valve body the porting of chambers is reversed The air distribution valve spool is moved from one end position to the other in the valve body by means of an internal pilot valve which alternately pressurizes the ends of the air distribu tion valve spool while simultaneously exhausting the other ends The pilot valve is positively shifted at each end of the diaphragm stroke by the diaphragm plate s coming in contact with the end of the pilot valve spool and pushing it into position for shifting of the air distribu tion valve The chambers are man folded together with a suction and dis charge check valve for each chamber to maintain flow in one direction through the pump INSTALLATION PROCEDURES Position the pump as close as possi ble to the source of the liquid to be pumped Avoid long or undersize suc tion lines and use the minimum number of fittings For permanent installation involving rigid piping install short flexible sec tions of hose between the pump and piping This reduces strains and per mi
3. list Part Number Description Model Number and Series Letter LINCOLN provides a Distributor Network that stocks equipment and replacement parts
4. FLAWS ON THE SURFACE MAY DAMAGE BEAR INGS AND SEAL During reassembly make certain that the rubber bumper is onthe rod on each side Install the diaphragm with the natural bulge outward as indicated on the diaphragm 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 approx imately 25 ft Ibs 3 456 kilograms meters Torque while allowing the dia phragm to turn freely with plates Usea wrench on the capscrew of the opposite side to keep 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 tight ening the manifoid flange bolts after chamber bolting is secured AIR DISTRIBUTION VALVE SERVICING The spool and sleeve are rust and corrosion resistant brass and hardened stainless steel The spool is closely sized to the sleeve and should slide freely Accumulation of dirt and oils may prevent the pump from cycling Remove the valve body from the center pump housing remove the end caps and push the spool out of the sleeve Wash the parts in cleaning solven
5. 40709 240709 240709 240710 240710 240710 240710 240711 240711 240711 240711 240712 240712 240712 240713 240713 240714 BN t 240717 t N A t N A 240720 240722 240723 240724 240725 240725 240725 240726 240726 240726 240727 240727 240727 240727 240728 240728 240728 240728 240729 240729 240729 240729 240730 HY 240730 HY N A BN 240730 HY 240731 240731 240731 240731 240732 240732 243564 240732 240733 240733 244191 BN 4240735 TF N A BN 244191 BN 244192 BN 244193 BN 240741 HY 4240742 TF m N A BN 2407414 HY 240743 240743 240743 240744 240744 240744 240745 240745 240745 240745 240746 240746 240746 240746 240747 240747 240747 240747 t 240748 t 240748 t 240748 t 240748 240749 TF 240750 240750 240750 240750 240751 240751 240751 240751 240752 240752 240752 240752 240753 240753 240753 240753 240709 240709 240709 243566 aaea 243565 240752 240752 240752 N A Not Available as a separate item see symbol for Repair Kit NI Fluorinated Nitrile TF Teflon HY Hytrel BN Buna N will be more prevalent when pump ing 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
6. 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 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 ex haust air Use of an anti freeze lubri cant in an air line lubricator should solve this problem CHECK VALVE SERVICING Whether removing cap screws on suction or discharge valve retainer cap make sure all pressure on suction and discharge side of pump has been relieved Re lock wire the capscrews before continuing use Need for inspection or service is usually indicated by poor priming un stable cycling reduced performance or the pump s cycling but not pumping Inspect the surfaces of both check valve and seat for wear or damage that could prevent proper sealing If pumpis to prime properly valves must seat air tight DIAPHRAGM SERVICING Remove the eight nuts securing the outer diaphragm chamber flange and remove the chamber Loosen the cap screw 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
7. LINCOLN Baa Industrial Division USA ISO 9001 Registered Models 84852 84853 84855 84856 1 AIR POWERED DIAPHRAGM PUMP Series B OPERATING AND SERVICE INSTRUCTIONS HAZARD WARNING POSSIBLE EXPLOSION HAZARD can result if 1 1 1 Trichloroethane Methylene Chloride or other Halogenated Hydrocarbon solvents 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 Haloge nated Hydrocarbon solvents A WARNING Do not use for pumping flam mable materials Build up and discharge of static electricity may result in a fire and or ex plosion causing personal injury and loss to property Principle of Operation The pumpis powered by compressed air which alternately pressurizes the inner sides of the two diaphragm cham bers while simultaneously exhausting LINCOLN Industral Division USA 1S0 9001 Registered FEB 95 OPERATING INSTRUCTIONS SERVICE MANUAL the opposite inner chambers causing the diaphragms which are connected by a shaft to move endwise Since air pressure is applied over the entire sur face of the diaphragm which is forcing liquid to be discharged by its other side the diaphragm is operating under a balanced condition during the dis charge stroke This allows the unit to be operated at discharge heads over 200
8. alve body and the pilot valve body from the pump The plung ers 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 bush ings if pins have bent A Note about Air Valve Lubrication The Lincoln 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 sys tem will operate with properly lubri cated compressed air supplies Proper lubrication of the compressed air sup ply would entail the use of an air line lubricator available from Lincoln set to deliver one drop of 10 wt non detergent oil for every 20 SCFM of air the pump consumed at its point of op eration Consult the pump s published Performance Curve to determine this It is important to remember to in spect the sleeve and spool set rou tinely 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 overtime collect any debris from the compressed air This can prevent the pump from operating properly RETAIN THIS INFORMATION FOR FUTURE REFERENCE When ordering replacement parts
9. f the compressed airline bleed the pressure and disconnect the air line from the pump The discharge line may be pressurized and must be bled ofits pressure Whenthe pump is used for toxic or aggressive fluids it should be flushed clean prior to disassembly When the pump is used for materials that tend to settle out or transform from liquid to solid form care must 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 INSTRUCTIONS TROUBLESHOOTING 1 Pump will not cycle A Check to make sure the unit has N enough pressure to operate and that the air inlet valve is open Check the discharge line to insure that the discharge line is neither closed nor blocked If the spool in the air distribution valve is not shifting check the main spool It must slide freely 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 Blockage in the liquid chamber can impede movement of diaphragm Pump cycles but will not pump A Suction side of pump pul
10. ling in air Check the suction line for air leaks and be sure that the end of the suc tion line is submerged Check flange bolting Check valve flanges and manifold to chamber flange joints 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 Check valves may not be seating properly To check remove the suc tion 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 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 Low performance A Capacity is reduced as the discharge pressure increases as indicated on the performance curve Performance capability varies with available inlet air supply Check air pressure at the pump inlet when the pump is oper ating to make certain that adequate air supply is maintained 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 REPAIR KITS AVAILABLE
11. per minute After pumping starts adjust the inlet air valve for the desired pump ing capacity When further opening of the inlet air valve increases cycling rate without increasing the flow rate the pump is being starved of liquid due to suction limitations Further opening of the air inlet valve willwaste compressed air Set the inlet air valve for lowest cycling rate that does not decrease flow rate for most efficient operation B5 15D Section Page FORM 402581 FREEZING OR ICING OF EXHAUST Icing of the air exhaust can occur under certain conditions of tempera ture and humidity on compressed air power equipment When pump perfor mance suffers because of icing a non sticky anti freeze lubricant such as KILFROST in an air line lubricator will solve the problem icing is more likely to occur at high discharge pressures Indicates Change if a diaphragm fails the pumped product or fumes can enter the air side of the pump This side is exhausted through the exhaust port muffler When the product is a hazar dous or toxic material the exhaust should be piped to an appropriate area for safe dis position When the product source is at a higher level than the pump flooded suction the exhaust should be piped to a higher level than the product to pre vent spilis caused by siphoning DUAL PORTED MANIFOLD MAINTENANCE AFTER USE Before maintenance or re pair shut of
12. t or kerosene and check the spool and sleeve for possible roughness nicks or scratches Use a fine stone or crocus cloth to care fully remove any irregular marks on the surfaces When the spool slides freely on the sleeve coat the parts with light oiland reassemble The four capscrews inserted through the valve body cap to hold the air valve to the intermediate section should be torqued to 150 in Ibs 1 728 kilograms meter PILOT VALVE SERVICING This assembly is reached by remov ing the air distribution valve body from the pump and lifting the pilot valve 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 Ifthe 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 retain ing ring around the sleeve When rein serting the pilot valve push both plung ers located inside the intermediate bracket out of the path of the pilot valve spool ends to avoid damage PILOT VALVE ACTUATOR SERVICING Bushings for the pilot valve actua tors 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 bushings for deterioration wear The plunger may be removed for inspection or replacement First remove the air distribution v
13. ts easier removal of the pump for service when required Attime of insta lation inspect all external gasketed fasteners for looseness caused by One Lincoln Way St Louis Missouri 63120 1578 314 679 4200 Copyright 1995 Printed in U S A AND REPAIR PARTS LIST gasket creep Tighten loose fittings securely to prevent leakage AIR SUPPLY Do not connect the unit to an air supply in excess of 125 PSI 8 61 bars Install a shutoff valve in the air supply line to permit removal of the unit for servicing When connecting an air sup ply of rigid piping mount a section of flexible line to the pump to eliminate piping strain In permanent installa tions an air line filter is recommended 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 A pressure regulating valve should be installed to prevent pressure from exceeding recommended limits OPERATION Your pump has been tested prior to shipment and is ready for use as received It is completely self priming and no ini tial filling with fluid is required If the unit is to be totally submerged the air exhaust must be piped above liquid level to prevent the liquid and foreign material from entering the air distribution valve mechanism Open the inlet air valve at least one turn to allow sufficient cycling rate for the pump to prime 30 to 60 cycles
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