
e3nmdlCsm-rev0712
www.versamatic.com Model E2 Non-Metallic Bolted • 8
Troubleshooting Guide
Symptom: Potential Cause(s): Recommendation(s):
Pump Cycles Once Deadhead(systempressuremeetsorexceedsair
supply pressure).
Increasetheinletairpressuretothepump.Pumpisdesignedfor1:1pressureratio
(Doesnotapplytohighpressure2:1units).
Air valve or intermediate gaskets installed incorrectly. Installgasketswithholesproperlyaligned.
Bent or missing actuator plunger. Remove pilot valve and inspect actuator plungers.
Pump Will Not Operate
/ Cycle
Pumpisoverlubricated. Setlubricatoronlowestpossiblesettingorremove.Unitsaredesignedforlube
Lackofair(linesize,PSI,CFM). Checktheairlinesizeandlength,compressorcapacity(HPvs.cfmrequired).
Check air distribution system. Disassembleandinspectmainairdistributionvalve,pilotvalveandpilotvalveactuators.
Dischargelineisblockedorcloggedmanifolds. Check for inadvertently closed discharge line valves. Clean discharge manifolds/piping.
Deadhead(systempressuremeetsorexceedsair
supply pressure).
Increasetheinletairpressuretothepump.Pumpisdesignedfor1:1pressureratio
(Doesnotapplytohighpressure2:1units).
Blockedairexhaustmufer. Removemuferscreen,cleanorde-ice,andre-install.
Pumpeduidinairexhaustmufer. Disassemblepumpchambers.Inspectfordiaphragmruptureorloosediaphragm
Pumpchamberisblocked. Disassembleandinspectwettedchambers.Removeorushanyobstructions.
Pump Cycles and Will
Not Prime or No Flow
Cavitation on suction side. Check suction condition (move pump closer to product).
Check valve obstructed. Valve ball(s) not seating
properly or sticking.
Disassemblethewetendofthepumpandmanuallydislodgeobstructioninthe
Clean out around valve ball cage and valve seat area. Replace valve ball or valve seat if damaged.
Use heavier valve ball material.
Valve ball(s) missing (pushed into chamber or
manifold).
Wornvalveballorvalveseat.Wornngersinvalveballcage(replacepart).Check
Resistance Guide for compatibility.
Valve ball(s)/seat(s) damaged or attacked by product. Check Chemical Resistance Guide for compatibility.
Checkvalveand/orseatiswornorneedsadjusting. Inspectcheckvalvesandseatsforwearandpropersetting.Replaceifnecessary.
Suction line is blocked. Removeorushobstruction.Checkandclearallsuctionscreensorstrainers.
Excessivesuctionlift. Forliftsexceeding20’ofliquid,llingthechamberswithliquidwillprimethepump
Suction side air leakage or air in product. Visuallyinspectallsuction-sidegasketsandpipeconnections.
Pumpeduidinairexhaustmufer. Disassemblepumpchambers.Inspectfordiaphragmruptureorloosediaphragm
Pump Cycles Running
Sluggish/Stalling,
Flow Unsatisfactory
Over lubrication. Setlubricatoronlowestpossiblesettingorremove.Unitsaredesignedforlube
Icing. Removemuferscreen,de-ice,andre-install.Installapointofuseairdrier.
Clogged manifolds. Cleanmanifoldstoallowproperairow
Deadhead(systempressuremeetsorexceedsair
supply pressure).
Increasetheinletairpressuretothepump.Pumpisdesignedfor1:1pressureratio
(Doesnotapplytohighpressure2:1units).
Cavitation on suction side. Check suction (move pump closer to product).
Lackofair(linesize,PSI,CFM). Checktheairlinesize,length,compressorcapacity.
Excessivesuctionlift. Forliftsexceeding20’ofliquid,llingthechamberswithliquidwillprimethepump
Airsupplypressureorvolumeexceedssystemhd. Decreaseinletair(press.andvol.)tothepump.Pumpiscavitatingtheuidbyfast
Undersizedsuctionline. Meetorexceedpumpconnections.
Restrictiveorundersizedairline. Install a larger air line and connection.
Suction side air leakage or air in product. Visuallyinspectallsuction-sidegasketsandpipeconnections.
Suction line is blocked. Removeorushobstruction.Checkandclearallsuctionscreensorstrainers.
Pumpeduidinairexhaustmufer. Disassemblepumpchambers.Inspectfordiaphragmruptureorloosediaphragm
Check valve obstructed. Disassemblethewetendofthepumpandmanuallydislodgeobstructioninthe
Checkvalveand/orseatiswornorneedsadjusting. Inspectcheckvalvesandseatsforwearandpropersetting.Replaceifnecessary.
Entrainedairorvaporlockinchamber(s). Purgechambersthroughtappedchamberventplugs.Purgingthechambersof
Product Leaking
Through Exhaust
Diaphragmfailure,ordiaphragmplatesloose. Replace diaphragms, check for damage and ensure diaphragm plates are tight.
Diaphragmstretchedaroundcenterholeorboltholes. Checkforexcessiveinletpressureorairpressure.ConsultChemicalResistance
Chartforcompatibility
withproducts,cleaners,temperaturelimitationsandlubrication.
Premature Diaphragm
Failure
Cavitation. Enlargepipediameteronsuctionsideofpump.
Excessiveoodedsuctionpressure. Movepumpclosertoproduct.Raisepump/placepumpontopoftanktoreduce
Install Back pressure device (Tech bulletin 41r). Add accumulation tank or pulsation dampener.
Misapplication(chemical/physicalincompatibility). ConsultChemicalResistanceChartforcompatibilitywithproducts,cleaners,temperature
and lubrication.
Incorrectdiaphragmplatesorplatesonbackwards,
installedincorrectlyorworn.
CheckOperatingManualtocheckforcorrectpartandinstallation.Ensureouter
worntoasharpedge.
Unbalanced Cycling Excessivesuctionlift. Forliftsexceeding20’ofliquid,llingthechamberswithliquidwillprimethepump
Undersizedsuctionline. Meetorexceedpumpconnections.
Pumpeduidinairexhaustmufer. Disassemblepumpchambers.Inspectfordiaphragmruptureorloosediaphragm
Suction side air leakage or air in product. Visuallyinspectallsuction-sidegasketsandpipeconnections.
Check valve obstructed. Disassemblethewetendofthepumpandmanuallydislodgeobstructioninthe
Checkvalveand/orseatiswornorneedsadjusting. Inspectcheckvalvesandseatsforwearandpropersetting.Replaceifnecessary.
Entrainedairorvaporlockinchamber(s). Purgechambersthroughtappedchamberventplugs.
Composite Repair Parts Drawing
**MUFFLER OPTION
*OVERLAY OPTION
General Model Specic
3: EXP VIEW
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