F-5510 for online viewing.pdf

Control for a GREEN Environment

PIM - Pressure Independent ModuleMaintain Constant Pressure Differential Across Anything!

Recommended Applications Where T needs to be improved WhereHVACsystemefficiencyneedstobe

improved and optimized Wheretemperaturevariancecannotberisked,

suchashospitals,laboratoriesorprisons Wherelongeractuatorlifeisrequired Whereexistingactuatedcontrolvalvesneedto

beconvertedtoPItechnology

2Pressure Independent Module

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Pressure Independent Module

Ultimate flexibility...mix and match to meet your exact need!

PIM-VUsethePIMModulewiththeGriswoldControls Unimizer-ActuatedBallValveforatruePressureIndependentValve.

Benefits: AllthebenefitsofanactuatedPIvalveata fractionoftheprice Maintainconstantflowregardlessofpressure changesinsystem Preventoverflowandunderflowinsystem ImprovesystemdeltaTandtherefore reduceflowrequired Extendactuatorlife Useany1/4turnLOWtorqueactuator Noactuatortoprogramorsetup Controlflowupto165gpmwiththe3valve,365 gpmwiththe4valveand505gpmwiththe6valve

PIM-V-MSIncludesPIMModule,ActuatedControlValveandMeteringStation

UsethePIMpressureregulatingmodulewithanActuatedControlValveforatruePressureIndependentValvewithaMeteringStationforflowverification

Benefits: Useany1/4turnLOWtorqueactuatorcompatible withcontrolvalve Noactuatortoprogramorsetup AVenturiMeteringStationcanbeusedtoverify flowforLEEDsrequirementsaswellasmonitor flowusage Controlflowupto165gpmwiththe3"valve,365 gpmwiththe4"valveand505gpmwiththe6"valve

Figure 1 PIM Module Figure 2 PIM-BV Figure 3 PIM-V Figure 4 PIM-V-MS

PIMModuleTheGriswoldControlsuniversalpressureregulator(PIM)canbeusedwithmanydifferentvalvestoprovidepressureindependentperformance,frommanualvalvestoactuatedvalves.ThePIMmodulecanalsobeusedtomaintainaconstantpressuredifferentialacrossabranchoranythingthatneedstobeindependentofpressurechanges.

Benefits: Maintainaconstantpressuredropacrossany valve,branchorequipmentincludingproducts alreadyinservice.Canalsobecombinedwith othervalvesfromGriswoldControls. +/-5%accuracythroughtheentirepressurerange Operatesautomaticallyoffsystempressure,no electronicsrequired Availablein3,4and6sizewithFlangedor GroovedEndconnections

PIM-BVUsethePIMpressureregulatingmodulewiththe

GriswoldControlsmanuallyoperatedballvalve.

Benefits: Equalpercentageparabolicportprofileprovides smoothflowcontrolwhenmanuallysettingvalve Setthevalveonceandflowwillremainconstant despitepressurechanges.Theequivalentofa externallyadjustableautomaticflowlimitingvalve! Changeflowasrequiredevenaftersystemis installedandsetupandpressureregulating modulewillmaintainflow+/-5%regardlessof pressurechanges

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GriswoldControlsRepresentative

8/12 F-5510

2803BarrancaParkwayIrvineCA92606|Phone8008380858Fax8005438662

E-mailinfo@griswoldcontrols.com|www.griswoldcontrols.com

SavevaluabletimebyeliminatingCvselectioninthe valveselectionprocess.SimplychoosethesmallestPressureIndependentValvethatsatisfiestheflowrequirementsandyouwillhavevalveauthority.

Controlflowexactly-especiallyatreducedloadsorloads lessthandesign

Controlflowexactly-nooverfloworunderflowatcoilsever

LowersystemenergycoststhroughefficientheattransferbyprovidingrelieffrommanycausesoflowTatcoils

Increaseactuatorlifeexpectancy-lessvalveandactuatormovementneededtomaintainsetpointsincepressurechangesarecompensatedforbythediaphragmcartridgeassemblyinsteadofbyactuatorpositionchanges.

Whenconventional2wayvalvesinvariableflowsystemsopenorclose,itcausesapressurechangetoothervalvesinthesystem.

PressureIndependentControlValvesmaintain the requiredflowrateregardlessofthesepressurechanges.

TheactuatormodulatesthePressureIndependentControlValvetoarequiredfixedflowbasedonload(orzone)requirements,independentofpressure.Whenthezoneissatisfiedtheactuatorstopsrotatingandthevalveisnowsetatoptimumflow.Ifthesystempressurechangestheinternaldiaphragmcompensatesforthepressurechangeandmaintainsconstantflowratewithoutcyclingbytheactuator.Theflowdoesnotchangeuntilthecontrolsystemtellstheactuatortochangethevalvepositionbasedonloadchanges.

Thisstableflowmeanslessworkfortheactuator,andactuatorlifeisthereforeincreased.

PressureIndependentValveOperation

Simpleretrofitnoneedtoknowexactflowrequirement

Simpleretrofit-nobalancingrequiredwithpressureindependentflowcontrol

Eliminatesbalancingvalves

Providemorecoolingfromexistingchillersasopposed to buyingadditionalornewchillers

Multifunctionhousingreducespipingandinstallationtimeaswellasnumberofcomponentsrequired.

P/Ttestportsstandardforcheckingandtestingvalveandcoiltemperatureandpressure.

Eliminatereversereturnpiping,oversizedmainpiping, andundersizedbranchpipinghydronicstrategies.

Features&Benefits(SeeF-5363foradditionalinformationonPIvalves)

PressureIndependentControlValvescanlimittheflowratetoalmostaninfinitenumberofflowratesbelowthespecifiedmaximum,providingbalancingatanypointbelowandincludingthemaximumflowrate.