
Installation
Installation Installation
Installation
Installationofthisequipmentinvolvespotentially
hazardousprocedures.Onlytrainedandqualied
personnelwhohavereadandwhounderstand
theinformationinthismanualshouldinstallthis
equipment.
•Allelectricalwiringmustbedonebyaqualied
electricianandcomplywithalllocalcodesand
regulations
General General
GeneralInformation Information
Information
TheTypicalInstallationshownisonlyaguide
forselectingandinstallingsystemcomponents.
ContactyourVerderrepresentativeforassistancein
planningasystemtosuityourneeds.Alwaysuse
GenuineVerderPartsandaccessories.Besureall
accessoriesareadequatelysizedandpressurerated
tomeetthesystem’srequirements.
Referencelettersinthetext,forexample(A),referto
thecalloutsinthegures.
Tighten Tighten
TightenFasteners Fasteners
Fasteners
Beforemountingandusingthepumpforthersttime,
checkandretorqueallexternalfasteners.Follow
TorqueInstructions,page22,orseethetorque
tagonyourpump.Aftertherstdayofoperation,
retorquethefasteners.
Tips Tips
Tipsto to
toReduce Reduce
ReduceCavitation Cavitation
Cavitation
Cavitationinadoublediaphragmpumpisthe
formationandcollapseofbubblesinthepumped
liquid.Frequentorexcessivecavitationcancause
seriousdamage,includingpittingandearlywearof
uidchambers,balls,andseats.Itmayresultin
reducedefciencyofthepump.Cavitationdamage
andreducedefciencybothresultinincreased
operatingcosts.
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.
Verderrecommendstakingalltheabovefactors
intoaccountinsystemdesign.Tomaintainpump
efciency,supplyonlyenoughpowertothepumpto
achievetherequiredow.
Verderdistributorscansupplysitespecic
suggestionstoimprovepumpperformanceand
reduceoperatingcosts.
859.07619