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Control for a GREEN Environment PIM -Pressure Independent Module Maintain Constant Pressure Differential Across Anything! Recommended Applications Where ∆T needs to be improved Where HVAC system efficiency needs to be improved and optimized Where temperature variance can not be risked, such as hospitals, laboratories or prisons Where longer actuator life is required Where existing actuated control valves need to be converted to PI technology

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  • 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

  • 4Pressure Independent Module

    GriswoldControlsRepresentative

    8/12 F-5510

    2803BarrancaParkwayIrvineCA92606|Phone8008380858Fax8005438662

    [email protected]|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.