Graco Husky 2150e - Installation; General Installation Guidelines; Tips to Reduce Cavitation

Installation
Installation Installation
Installation
Installationofthisequipmentinvolvespotentially
hazardousprocedures.Onlytrainedandquali󰘰ed
personnelwhohavereadandwhounderstand
theinformationinthismanualshouldinstallthis
equipment.
•Allelectricalwiringmustbedonebyaquali󰘰ed
electricianandcomplywithalllocalcodesand
regulations
General General
General
Information Information
Information
TheTypicalInstallationshownisonlyaguidefor
selectingandinstallingsystemcomponents.Contact
yourGracodistributorforassistanceinplanninga
systemtosuityourneeds.AlwaysuseGenuine
GracoPartsandaccessories.Besureallaccessories
areadequatelysizedandpressureratedtomeetthe
system’srequirements.
Referencelettersinthetext,forexample(A),referto
thecalloutsinthe󰘰gures.
Tighten Tighten
Tighten
Fasteners Fasteners
Fasteners
Beforemountingandusingthepumpforthe󰘰rsttime,
checkandretorqueallexternalfasteners.Follow
TorqueInstructions,page23,orseethetorque
tagonyourpump.Afterthe󰘰rstdayofoperation,
retorquethefasteners.
Tips Tips
Tips
to to
to
Reduce Reduce
Reduce
Cavitation Cavitation
Cavitation
Cavitationinadoublediaphragmpumpisthe
formationandcollapseofbubblesinthepumped
liquid.Frequentorexcessivecavitationcancause
seriousdamage,includingpittingandearlywearof
󰘱uidchambers,balls,andseats.Itmayresultin
reducedef󰘰ciencyofthepump.Cavitationdamage
andreducedef󰘰ciencybothresultinincreased
operatingcosts.
Cavitationdependsonthevaporpressureofthe
pumpedliquid,thesystemsuctionpressure,andthe
velocitypressure.Itcanbereducedbychangingany
ofthesefactors.
1.Reducevaporpressure:Decreasethe
temperatureofthepumpedliquid.
2.Increasesuctionpressure:
a.Lowertheinstalledpositionofthepump
relativetotheliquidlevelinthesupply.
b.Reducethefrictionlengthofthesuction
piping.Rememberthat󰘰ttingsaddfriction
lengthtothepiping.Reducethenumberof
󰘰ttingstoreducethefrictionlength.
c.Increasethesizeofthesuctionpiping.
NOTE: NOTE:
NOTE:
Besuretheinlet󰘱uidpressuredoesnot
exceed25%oftheoutletworkingpressure.
3.Reduceliquidvelocity:Slowthecyclicrateof
thepump.
Pumpedliquidviscosityisalsoveryimportantbut
normallyiscontrolledbyfactorsthatareprocess
dependentandcannotbechangedtoreduce
cavitation.Viscousliquidsaremoredif󰘰culttopump
andmorepronetocavitation.
Gracorecommendstakingalltheabovefactors
intoaccountinsystemdesign.Tomaintainpump
ef󰘰ciency,supplyonlyenoughpowertothepumpto
achievetherequired󰘱ow.
Gracodistributorscansupplysitespeci󰘰c
suggestionstoimprovepumpperformanceand
reduceoperatingcosts.
3A4068H9