spfp15-rev0913 Model SPFP15 Food Processing • 6
www.standardpump.com
Recommended Installation Guide Troubleshooting Guide
Symptom: Potential Cause(s): Recommendation(s):
Pump Cycles Once Deadhead(systempressuremeetsorexceedsair
supplypressure).
Increasetheinletairpressuretothepump.Pumpisdesignedfor1:1pressureratioatzeroow.
(Doesnotapplytohighpressure2:1units).
Airvalveorintermediategasketsinstalledincorrectly. Installgasketswithholesproperlyaligned.
Bentormissingactuatorplunger. Removepilotvalveandinspectactuatorplungers.
Pump Will Not Operate
/ Cycle
Pumpisoverlubricated. Setlubricatoronlowestpossiblesettingorremove.Unitsaredesignedforlubefreeoperation.
Lackofair(linesize,PSI,CFM). Checktheairlinesizeandlength,compressorcapacity(HPvs.cfmrequired).
Checkairdistributionsystem. Disassembleandinspectmainairdistributionvalve,pilotvalveandpilotvalveactuators.
Dischargelineisblockedorcloggedmanifolds. Checkforinadvertentlycloseddischargelinevalves.Cleandischargemanifolds/piping.
Deadhead(systempressuremeetsorexceedsair
supplypressure).
Increasetheinletairpressuretothepump.Pumpisdesignedfor1:1pressureratioatzeroow.
(Doesnotapplytohighpressure2:1units).
Blockedairexhaustmufer. Removemuferscreen,cleanorde-ice,andre-install.
Pumpeduidinairexhaustmufer. Disassemblepumpchambers.Inspectfordiaphragmruptureorloosediaphragmplateassembly.
Pumpchamberisblocked. Disassembleandinspectwettedchambers.Removeorushanyobstructions.
Pump Cycles and Will
Not Prime or No Flow
Cavitationonsuctionside. Checksuctioncondition(movepumpclosertoproduct).
Checkvalveobstructed.Valveball(s)notseating
properlyorsticking.
Disassemblethewetendofthepumpandmanuallydislodgeobstructioninthecheckvalvepocket.
Cleanoutaroundvalveballcageandvalveseatarea.Replacevalveballorvalveseatifdamaged.
Useheaviervalveballmaterial.
Valveball(s)missing(pushedintochamberor
manifold).
Wornvalveballorvalveseat.Wornngersinvalveballcage(replacepart).CheckChemical
ResistanceGuideforcompatibility.
Valveball(s)/seat(s)damagedorattackedbyproduct. CheckChemicalResistanceGuideforcompatibility.
Checkvalveand/orseatiswornorneedsadjusting. Inspectcheckvalvesandseatsforwearandpropersetting.Replaceifnecessary.
Suctionlineisblocked. Removeorushobstruction.Checkandclearallsuctionscreensorstrainers.
Excessivesuctionlift. Forliftsexceeding20’ofliquid,llingthechamberswithliquidwillprimethepumpinmostcases.
Suctionsideairleakageorairinproduct. Visuallyinspectallsuction-sidegasketsandpipeconnections.
Pumpeduidinairexhaustmufer. Disassemblepumpchambers.Inspectfordiaphragmruptureorloosediaphragmplateassembly.
Pump Cycles Running
Sluggish/Stalling,
Flow Unsatisfactory
Overlubrication. Setlubricatoronlowestpossiblesettingorremove.Unitsaredesignedforlubefreeoperation.
Icing. Removemuferscreen,de-ice,andre-install.Installapointofuseairdrier.
Cloggedmanifolds. Cleanmanifoldstoallowproperairow
Deadhead(systempressuremeetsorexceedsair
supplypressure).
Increasetheinletairpressuretothepump.Pumpisdesignedfor1:1pressureratioatzeroow.
(Doesnotapplytohighpressure2:1units).
Cavitationonsuctionside. Checksuction(movepumpclosertoproduct).
Lackofair(linesize,PSI,CFM). Checktheairlinesize,length,compressorcapacity.
Excessivesuctionlift. Forliftsexceeding20’ofliquid,llingthechamberswithliquidwillprimethepumpinmostcases.
Airsupplypressureorvolumeexceedssystemhd. Decreaseinletair(press.andvol.)tothepump.Pumpiscavitatingtheuidbyfastcycling.
Undersizedsuctionline. Meetorexceedpumpconnections.
Restrictiveorundersizedairline. Installalargerairlineandconnection.
Suctionsideairleakageorairinproduct. Visuallyinspectallsuction-sidegasketsandpipeconnections.
Suctionlineisblocked. Removeorushobstruction.Checkandclearallsuctionscreensorstrainers.
Pumpeduidinairexhaustmufer. Disassemblepumpchambers.Inspectfordiaphragmruptureorloosediaphragmplateassembly.
Checkvalveobstructed. Disassemblethewetendofthepumpandmanuallydislodgeobstructioninthecheckvalvepocket.
Checkvalveand/orseatiswornorneedsadjusting. Inspectcheckvalvesandseatsforwearandpropersetting.Replaceifnecessary.
Entrainedairorvaporlockinchamber(s). Purgechambersthroughtappedchamberventplugs.Purgingthechambersofaircanbedangerous.
Product Leaking
Through Exhaust
Diaphragmfailure,ordiaphragmplatesloose. Replacediaphragms,checkfordamageandensurediaphragmplatesaretight.
Diaphragmstretchedaroundcenterholeorboltholes. Checkforexcessiveinletpressureorairpressure.ConsultChemicalResistanceChartforcompatibility
withproducts,cleaners,temperaturelimitationsandlubrication.
Premature Diaphragm
Failure
Cavitation. Enlargepipediameteronsuctionsideofpump.
Excessiveoodedsuctionpressure. Movepumpclosertoproduct.Raisepump/placepumpontopoftanktoreduceinletpressure.
InstallBackpressuredevice(Techbulletin41r).Addaccumulationtankorpulsationdampener.
Misapplication(chemical/physicalincompatibility). ConsultChemicalResistanceChartforcompatibilitywithproducts,cleaners,temperaturelimitations
andlubrication.
Incorrectdiaphragmplatesorplatesonbackwards,
installedincorrectlyorworn.
CheckOperatingManualtocheckforcorrectpartandinstallation.Ensureouterplateshavenotbeen
worntoasharpedge.
Unbalanced Cycling Excessivesuctionlift. Forliftsexceeding20’ofliquid,llingthechamberswithliquidwillprimethepumpinmostcases.
Undersizedsuctionline. Meetorexceedpumpconnections.
Pumpeduidinairexhaustmufer. Disassemblepumpchambers.Inspectfordiaphragmruptureorloosediaphragmplateassembly.
Suctionsideairleakageorairinproduct. Visuallyinspectallsuction-sidegasketsandpipeconnections.
Checkvalveobstructed. Disassemblethewetendofthepumpandmanuallydislodgeobstructioninthecheckvalvepocket.
Checkvalveand/orseatiswornorneedsadjusting. Inspectcheckvalvesandseatsforwearandpropersetting.Replaceifnecessary.
Entrainedairorvaporlockinchamber(s). Purgechambersthroughtappedchamberventplugs.
2: INSTAL & OP