
Installation
Installation Installation
Installation
General General
GeneralInformation Information
Information
TheTypicalInstallationshownisonlyaguidefor
selectingandinstallingsystemcomponents.Contact
yourGracodistributorforassistanceinplanninga
systemtosuityourneeds.AlwaysuseGenuine
GracoPartsandaccessories.Besureallaccessories
areadequatelysizedandpressureratedtomeetthe
system’srequirements.
Referencelettersinthetext,forexample(A),referto
thecalloutsinthegures.
Variationsincolorbetweentheplasticcomponents
ofthispumparenormal.Colorvariationdoesnot
affecttheperformanceofthepump.
Tighten Tighten
TightenFasteners Fasteners
Fasteners
Beforemountingandusingthepumpforthersttime,
checkandretorqueallexternalfasteners.Follow
TorqueInstructions,page16,orseethetorque
tagonyourpump.Aftertherstdayofoperation,
retorquethefasteners.
Tips Tips
Tipsto to
toReduce Reduce
ReduceCavitation Cavitation
Cavitation
CavitationinanAODDpumpistheformationand
collapseofbubblesinthepumpedliquid.Frequent
orexcessivecavitationcancauseseriousdamage,
includingpittingandearlywearofuidchambers,
balls,andseats.Itmayresultinreducedefciencyof
thepump.Cavitationdamageandreducedefciency
bothresultinincreasedoperatingcosts.
Cavitationdependsonthevaporpressureofthe
pumpedliquid,thesystemsuctionpressure,andthe
velocitypressure.Itcanbereducedbychangingany
ofthesefactors.
1.Reducevaporpressure:Decreasethe
temperatureofthepumpedliquid.
2.Increasesuctionpressure:
a.Lowertheinstalledpositionofthepump
relativetotheliquidlevelinthesupply.
b.Reducethefrictionlengthofthesuction
piping.Rememberthatttingsaddfriction
lengthtothepiping.Reducethenumberof
ttingstoreducethefrictionlength.
c.Increasethesizeofthesuctionpiping.
NOTE: NOTE:
NOTE:Besuretheinletuidpressuredoesnot
exceed25%oftheoutletworkingpressure.
3.Reduceliquidvelocity:Slowthecyclicrateof
thepump.
Pumpedliquidviscosityisalsoveryimportantbut
normallyiscontrolledbyfactorsthatareprocess
dependentandcannotbechangedtoreduce
cavitation.Viscousliquidsaremoredifculttopump
andmorepronetocavitation.
Gracorecommendstakingalltheabovefactors
intoaccountinsystemdesign.Tomaintainpump
efciency,supplyonlyenoughairpressuretothe
pumptoachievetherequiredow.
Gracodistributorscansupplysitespecic
suggestionstoimprovepumpperformanceand
reduceoperatingcosts.
Mount Mount
MountThe The
ThePump Pump
Pump
Toavoidseriousinjuryordeathfromtoxicuidor
fumes:
•Ventilatetoaremotearea.Thepump
exhaustairmaycontaincontaminants.See
AirExhaustVentilation,page11.
•Nevermoveorliftapumpunderpressure.If
dropped,theuidsectionmayrupture.Always
followthePressureReliefProcedure,page14,
beforemovingorliftingthepump.
1.Besurethemountingsurfacecansupportthe
weightofthepump,hoses,andaccessories,as
wellasthestresscausedduringoperation.
2.Forallmountings,besurethepumpissecured
withscrewsthroughthemountingfeet.
3.Makesurethesurfaceisatandthatthepump
doesn’twobble.
4.Foreaseofoperationandservice,mountthe
pumpsoairvalve,airinlet,uidinletanduid
outletportsareeasilyaccessible.
5.ProlongedexposuretoUVradiationwilldegrade
naturalpolypropylenecomponentsofthepumps.
Topreventpotentialinjuryorequipmentdamage,
donotexposepumportheplasticcomponents
todirectsunlightforprolongedperiods.
8 3A2578E