f-5510 for online viewing.pdf
TRANSCRIPT
-
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
3
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.