A Packaged Water Heater Ready For Installation
MODEL ST
ASME
U
Features■ Reliable� Onlyhighgradematerialsusedin
constructiontoensurelongoperatinglife
� Hydrastonecementliningprovidessuperiorprotectionandtanklongevity
� Heavydutyconstructionwithstandsdemandingcommercial/industrialuse
■ Packaged System� Factorysuppliedwithallsteamcontrols
savingtimeandmoneyduringinstallation� Allsteamoperatingcontrolsarefactory
sizedandselectedtoensurereliableoperation
■ Versatile� Fullrangeofstyles,sizes,andoptional
featurestomeetyourexactheatingneeds
Applications■ Schools■ OfficeBuildings■ Prisons■ Stadiums■ Hotels■ IndustrialFacilities
■ NursingHomes■ Hospitals
The Model ST is a fully packaged steam fired storage water heater
Model STH Storage Tank Type
A Heavy Duty Steam Fired Storage Water HeaterTheModelSTisafullypackagedsteamfiredwaterheater
designedtobeareliableandlonglastingsourceforhotwater.Eachcomponentiscarefullyselectedtoensureperformanceineventhemostdemandingapplication.Whetheryouareheatingpotablewaterinacommercialbuildingorprocesswaterinan
industrialapplication,youcanselectaHubbellModelSTtodothejob.WhenyouspecifyandinstallaHubbellSTmodelwaterheateryouwillhaveconfidenceinknowingthattheownerwillbeprovidedwithaqualityproductthatisalonglastingandtrouble-freesourceforhotwater.
Packaged Steam Fired Water HeaterUtilizes Steam To Heat Domestic Water, Semi-Instantaneous or Storage Type Heaters
2
Cement Lined Tanks ProvideLonger Service Life
Unlined TaNks
1. 90/10Copper-NickelA90%Copper10%Nickelalloypressurevesselprovidesstrengthandcorrosionresistance.Typicallyusedinapplicationswithcorrosiveenvironments(saltwater)orincriticalcommercialandindustrialapplicationsrequiringlongtanklife.
2. AlternativeCementFormulationsTomeetthespecificrequirementsofDIWater,ROWater,extendedserviceandorhightemperatureapplications,alternativeformulationsofcementareavailable.Pleaseconsultfactoryforassistance.
3. PhenolicLiningAnepoxycoatingappliedin2coatstoatotalof10-12milsDFT.TypicallyusedinprocessapplicationsusinglowconductivityDIdistilledorfoodgradewater.
4. GalvanizingThesteelpressurevesselispickledandhotdippedinmoltenzinctocreateabarrierwhichinternallyandexternallyprotectsasteelvesselforcoldandhotwaterstorage.
An Unlinedtankdoesnotrequirealiningbecausethepressurevesselitself isconstructedfrommaterialwhichisimpervioustothecorrosiveeffectsofhotwater.Thistypeoftankwillprovideasignificantlylongerservicelifethanalllinedsteeltanks,butisinitiallymorecostly.
2. StainlessSteelStainlesssteel(Specify:Type304,316,or316L)iswellsuitedforindustrialandhighpurityapplicationsrequiringacorrosionresistanttankwithminimalleachingofimpuritiesintothewater.Wellsuitedforprocess,RO,andDIwatersystemsinthepharmaceutical,foodandelectronicindustries.
Linings Available For A Steel Tank
AspeciallyformulatedHydrastonecementappliedtoaminimumof5⁄8"thicknessonallsurfaces.Thecementliningcovers100%ofallinteriorsurfacesandis125timesthickerthanglasslining.Duetothethicknessandguaranteedcoverageofcementliningthereisnoneedforasacrificialanode.Anextremelydurableandlonglastingliningsuitableforhotandcoldpotablewaterstorageinavarietyofcommercialandindustrialapplications.
1. CementLining
Q ?Failureofatank'sprotectiveliningallowswatertocomeintodirectcontactwiththesteeltankcausingittocorrodeandleak.
Therefore,thetypeofprotectiveliningisthesinglemostimportantfeaturewhendeterminingthequalityofanywaterheater.Theabilityofaliningtoprotectthesteeltankisprimarilybaseduponitsthicknessandcompletecoverageofallsteelsurfaces.
Whatisthemostcommonreasonwhyawaterheaterfails?
A !
3
Model ST Storage Type Standard Equipment
Model ST Optional Equipment
Vessel Construction1. Allweldedcarbonsteelvesseldesignedand
builtinstrictaccordancewiththeASMECodeSectionVIIIandstamped,certifiedandregisteredwiththeNationalBoardofBoilerandPressureVesselInspectors
2. Allinternaltanksurfacesarelinedwithaminimumof5⁄8"thickHydrastonecementforsuperiorprotectionandtanklongevity
3. Designedfor125psiworkingpressureandhydrostaticallytested
Steam Heating Coil1. Ahighqualityfactoryinstalled2passU-Tube
heatingcoilconstructedfrom18gauge¾"O.D.singlewallcoppertubingdesignedforamaximumworkingpressureof150psi
2. Allwettedpartsarenon-ferrousformaximumlongevity
3. HeavydutyfabricatedsteelheadwiththreadedNPTsteamandcondensateconnections
4. Copperlinedtubesheet5. PleaseReferenceHUBBELLbrochure“Heating
Coils”fordetailedheatingcoilconstructionfeaturesSteam Operating Controls
1. Steamoperatingcontrolsarefactoryselected,sized,pipedandtestedtoensurereliableoperation
2. Allsteamcomponentsarefactoryplumbedwithschedule40blackironpipeandreadyforsteamandcondensateconnections
3. Highqualitycastironpilotoperatedsteamcontrolvalvemodulatestheflowofsteamthroughtheheatingcoiltoprovideaccuratewatertemperaturecontrol
4. CastironYstrainerwith20Meshscreenprotectsthesteamcontrolsandcoilfromdirtanddebrisinthesteamsupply
5. Thermostaticdriptrapremovescondensatefromthesteamsupplyline
6. Heavydutycastironfloatandthermostaticmaincondensatetrapforoptimumefficiency
7. Brassvacuumbreakeranddialsteampressuregauge
General1. Heavyduty3"thickfiberglassinsulation
covers100%ofthepressurevesselformaximumoperatingefficiencyandminimalstand-byheatloss
2. Heavygaugepaintedgalvanizedsteelprotectiveouterjacket
3. Heavydutyintegrallyweldedsteelsupportsforfloormounting
4. Fullfive(5)yearNonPro-Ratedtankwarrantyandaone(1)yearsteamcomponentwarranty
5. ASMEratedcombinationT&Preliefvalvesetatthetankworkingpressureand210oF
NOTE:Otheroptionalfeaturesareavailable,pleaseconsultfactoryifrequired.
Steam Heating Coil4. Doublewalltubingwithaleakdetectionport5. Alternatetubingmaterialpleasespecify:
(StainlessSteel,90/10Copper-Nickel,Admiralty,Other)
6. Fabricatedsteamheadconstructedfrom:(StainlessSteel,CopperAlloy,Other)
General7. SkidmountingonheavydutyallweldedIBeam8. Type304stainlesssteelprotectivejacket,please
specifyifpainted9. Manway12"x16"orInspectionOpening3"NPT
Vessel1. Alternateprotectivelining:
Phenolicepoxyresin,Flamespraycopper,Hotdipgalvanizing,other
2. Alternatevesselconstruction:StainlessSteelType304or316L,90/10Copper-Nickel,other
3. Alternateworkingpressure:Pleasespecify
Operating Controls10. Steamcontrolscanbefactoryselectedandsized,
butshippedlooseforinthefieldinstallationbyothers
11. Varioussteamcontrolvalvesareavailabletomeetthespecificneedsofyourapplication,pleasespecify:Self-operatedtype,pneumaticoperated,electronicoperated,separatepressurereducingpilottype
12. Singlesolenoidsafetysystemclosesthesteamsupplytothecontrolvalveshouldthewatertemperatureinthetankreachthehi-limitsetpoint.Requires120volt5ampelectricalservice
13. Adoublesolenoidsafetysystemdumpsoverheatedwaterinthestoragetanktodraininadditiontoclosingthesteamsupplytothecontrolvalve.Requires120volt5ampelectricalservice
14. Intra-tankcirculationpumppackagecontinuouslycirculateswaterwithinthetankinordertoreducestratification.AllbronzefractionalHPpump
15. Anticipatorcontrolsystemforcesincomingcoldwateroverthecontrolvalvesensingbulbinordertobeginheatingwaterimmediately
16. Dialwaterthermometerandpressuregaugefactoryinstalledinthetank
17. Factorywrappedandbaffledsteamcoilwithintegralpumppackage
Please note: optional equipment may impact overall dimensions and weight. Please request submittal drawing from factory.
4
Note:Alldimensionsareapproximateandsubjecttochange.Pleasereferencethesubmittaldrawingforactualdimensions.Thetankselectionsaboveareshownforconvenience.Afullselectionofstoragecapacitiesisavailablebyenteringthedesiredcapacityintothemodelnumber.* 80,120and150gallontanksdonotcomeequippedwithamanway.Pleaseconsultfactoryifdesiredonthesesizes.
Overall Dimensions, Models ST and STH
ActualStorageCapacity(Gallons)
OverallDimensions(Inches) StorageTank
NominalStorageCapacity(Gallons)
InletOutletSizing(NPT)
Approx.ShippingWeight(Lbs.)
Vertical HorizontalDiameter
“A”Height“B”
Length“C”
Width“D”
Height“E”
DiameterxLength
80* 26 65 60 26 32 22 x 54 90 1.5 700
120* 28 75 68 28 34 24 x 64 140 1.5 900
150* 30 79 72 30 36 26 x 68 170 1.5 1100
175 36 73 67 36 44 30 x 63 195 1.5 1500
200 36 82 76 36 44 30 x 72 220 1.5 1700
225 36 89 83 36 44 30 x 79 245 1.5 1750
250 42 74 68 42 50 36 x 64 285 1.5 1850
275 42 80 74 42 50 36 x 70 310 1.5 2000
300 42 88 82 42 50 36 x 78 345 1.5 2180
325 42 92 86 42 50 36 x 82 360 1.5 2300
350 42 94 88 42 50 36 x 84 370 1.5 2500
375 48 81 75 48 56 42 x 71 425 1.5 2600
400 48 85 79 48 56 42 x 75 450 1.5 2700
425 48 88 82 48 56 42 x 78 470 1.5 2900
450 48 93 87 48 56 42 x 83 500 1.5 3000
475 54 79 73 54 62 48 x 69 540 2 3100
500 54 82 76 54 62 48 x 72 565 2 3225
525 54 85 79 54 62 48 x 75 590 2 3350
550 54 89 83 54 62 48 x 79 620 2 3400
575 54 93 87 54 62 48 x 83 650 2 3500
600 54 95 89 54 62 48 x 85 665 2 3650
700 54 107 101 54 62 48 x 97 755 2 4000
800 54 119 113 54 62 48 x 109 850 2 4300
900 54 132 126 54 62 48 x 122 940 2 4800
1000 54 145 139 54 62 48 x 135 1060 2 5200
1250 60 149 143 60 68 54 x 139 1380 2 5600
1500 60 174 168 60 68 54 x 164 1625 2 6000
1750 66 168 162 66 74 60 x 158 1935 3 7400
2000 66 185 179 66 74 60 x 175 2145 3 8100
2500 78 169 163 78 86 72 x 159 2800 3 8200
3000 78 197 191 78 86 72 x 187 3300 3 8300
3500 90 174 168 90 98 84 x 164 3935 6FLG. 8900
4000 90 195 189 90 98 84 x 185 4440 6FLG. 9800
4500 N/A N/A 168 102 108 96 x 160 5015 6FLG. 10700
5000 N/A N/A 183 102 108 96 x 175 5485 6FLG. 11600
5
Model ST (Vertical)
SideView
FrontView
WithdrawalSpace
HotWaterOutlet
LiftingLug
T&PReliefValve
C
E
D
HeatingCoil
28"
ColdWaterInlet
PressureVessel
Insulation
ProtectiveJacket
Drain
Manway
SideView FrontView
A
ProtectiveJacket
PressureVessel
12"x16"Manway
WithdrawalSpace
HeatingCoil
28"
CombinationColdWaterInletandDrain
6"
B
HotWaterOutlet
T&PReliefValve 4"
Insulation
Outline Dimensions
Convection Model Shown
Model STH (Horizontal)Convection Model Shown
LiftingLug
Supports
SkidBase(optional)
Standard:SaddleOptional:Skids
6
Steam Component General ConfigurationThesteamcontrolvalvemaintainsaccuratewatertemperatureinasteamfiredwaterheaterbyregulatingtheflowofsteamthroughtheheatingcoil.
There are four types of steam control valves available for use on a steam fired storage water heater.
Self Operating
Thevalvedesignincludesabulbandcapillaryassemblychargedwithathermallyresponsivevapor.Theexpansion/contractionofthevaporactsuponthevalvebellowsinordertocontroltheflowofsteamthroughthevalve.Noexternalpowersourceisrequiredforoperation.
Pneumatically Operated
Inthisconfigurationthebuildingairsupplyfeedsafactoryinstalledtemperaturecontrollerwhichoperatesthesteamcontrolvalve.Thetemperaturecontrollersendsapreciseairsignaltothesteamcontrolvalvewhichadjuststheflowofsteamintotheheatingcoil.Thetemperaturecontrollerisfullyadjustablefrom50-250oFandrequires20psiairatamaximumconsumptionof0.5SCFM.
Pilot OperatedApilotoperatedcontrolvalveisthemostwidelyusedtypeofvalveforstandardwaterheatingapplications.Inthistypeofvalve,atemperaturepilotdeviceutilizessteamtooperatethemainvalve.Noexternalpowersourceisrequiredotherthansteam.Thisisahighlydependabletemperaturecontrolsystemwhichissuitableformostcommercialandindustrialapplications.Asanoption,thisvalvemayincludeapressurereducingpilotwhichlimitsthesteampressuretoapredeterminedmaximum.
Electronic OperatedThiscontrolvalveissimilartoapneumaticallyoperatedsystem,exceptinthiscasethetemperaturecontrollerisaPIDdigitaldisplayelectronictemperaturecontrollerwhichoutputsa4-20mAsignaltoacompactmotormountedonthesteamcontrolvalveinordertoproportionallycontroltheflowofsteamtotheheatingcoil.ThetemperaturecontrollerdisplayssetpointaswellasactualwatertemperatureandisavailablewithanRS485communicationsportforremotecontrol.
F&TMainCondensateTrap
AdjustableTemperaturePilot
SteamInlet
YStrainer
CondensateOutlet
SteamControlValve
ThermostaticDripTrap
Tosensingbulbintank
Pneumaticorelectroniccontroller(ifrequired)
SteamPressureGauge
VacuumBreaker
SteamCoil
YStrainer
Models ST and STH Number Designation
opTioN NoTe
Anyandalloptionalequipmentforawaterheatermustbecalledoutinthewrittenspecifications.Amodelnumberinandofitselfdoesnotreflectanyoptionalequipmentselected.
Example: ST600SL - 1250A vertically installed 600 gallon steam fired water heater with a cement lined steel storage tank rated to heat 1250 GPH at a 100oF temperature rise.
■Step2
StorageCapacity:80-5000Gallons
■Step1
Model:ST= Vertical STH = Horizontal
■Step4
RecoveryRating:InGPHat100oF∆T
—
■Step5
CoilType:S=SingleWallD=DoubleWall
■ Step 3Vessel Type:SL = Cement Lined SteelGL = Phenolic Lined SteelM = Galvanized SteelCN = Solid 90/10 Copper Nickel SS = Solid Stainless Steel(specify Type 304 or 316L)
JOBNAME
REPRESENTATIVE
ENGINEER
CONTRACTOR
Master Specification: Model ST
GENERALProvideaquantityof packagedtypesteamfiredstoragewaterheater(s)ModelNo.asmanufacturedbyHUBBELLElectricHeaterCo.,Stratford,CT.Thepressurevesselshallbemountedonstructuralsupportsandbesuitablyinsulated,jacketed,paintedandprovidedwithliftinglugs.Theentireunitistobepackagedreadyforserviceconnections.
PRESSURE VESSELThepressurevesselshallbeallweldedconstructionandASMECodeSectionVIIIstampedforaworkingpressureof125psi( OptionalSpecification: psi)andcontainaminimumof gallonsofstorage.ThestoragevesselshallbecarbonsteelandlinedwithseamlessHydrastonecementtoaminimumthicknessof5⁄8"on100%ofallinteriortanksurfaces( OptionalSpecifications:Phenoliclinedsteeltank,galvanizedsteeltank,solidType304or316Lstainlesssteeltank,solid90/10Copper-nickeltank).Thepressurevesselistobeinsulatedwith3"thickenergyconservationfiberglassblanketinsulationandenclosedinaheavygaugegalvanizedsteelmetaljacketfinishedingrayhammertoneenamel.ThevesselshallbeprotectedbyanASMEapprovedautomaticreseatingcombinationtemperatureandpressurereliefvalvesetatthetankworkingpressureand210oF.
HEATING SECTIONThe heatingcoilshallberatedtoheat GPHfrom oFto oFwhensuppliedwith PSIofsteamtothecontrolvalveandconsume lbs/hoursteam.Thesinglewall( OptionalSpecification:doublewall)heatingcoilshallbeconstructedfrom¾"O.D.copper( OptionalSpecifications:90/10Copper-nickel,admiralty,stainlesssteel)tubeswithallnon-ferrouswettedpartsandfabricatedsteelhead( OptionalSpecification:Fabricatedstainlesssteelhead,fabricatedcopper-alloyhead).
CONTROLSThewaterheatershall(shallnot)besuppliedwithsteamoperatingcontrols.Acastironpilotoperated( Optional Specifications: Pneumatic,selfoperating,electronic)typesteamcontrolvalveshallregulatetheflowofsteamtotheheatingcoilinordertocontrolwatertemperature.Athermostaticdriptrap,mainF&Tcondensatetrap,Ystrainers,vacuumbreakerandsteampressuregaugeshallbefactorysizedandpipedwiththesteamcontrolvalve.
Inaddition,thewaterheatermaybesuppliedwiththefollowingoptionalfeatures:
Option Domesticwaterdialtemperatureandpressuregaugeshallbefactoryinstalled.
Option Thewaterheatershallbeequippedwithafactorypackagedintra-tankcirculatortoconstantlycirculatewaterwithinthetanktoreducestratification.
Option Theheatingcoilshallbewrappedandbaffledandpipedwithanintegralpumppackagetoforcecirculatewaterovertheheatingcoilinordertoreducethecoilsize.
Option Singlesolenoidsafetysystemtoclosethesteamsupplytotheheatingcoilshouldthewatertemperatureinthetankreachthehi-limitsetpoint.Requires5Amp,120Voltservice.
Option Doublesolenoidsafetysystemdumpsoverheatedwaterinthestoragetanktodraininadditiontoclosingthesteamsupplytothecontrolvalve.Requires5Amp,120Voltservice.
WARRANTYHUBBELLshallwarrantyallcomponentsagainstdefectsinworkmanshipandmaterialforaperiodofone(1)yearfromdateofstart-upandthepressurevesselforafullfive(5)yearsNonPro-Rated( OptionalSpecification:fullten(10)yearsNonPro-Rated)fromdateofstart-up,providedthattheunitisstartedwithinthree(3)monthsofdateofshipmentandinstalledandoperatedwithinthescopeofthetankdesignandoperatingcapability.Eachwaterheatershallbeshippedwithacompletesetofinstallationandoperatinginstructionsincludingasparepartslistandapproveddrawing.
The Electric Heater Company ■ P.O. Box 288 ■ Stratford, CT 06615-0288 ■ Phone: 203-378-2659 ■ Fax: [email protected] ■ www.hubbellheaters.com
ISO 9001:2008 ISO
Committed to continuous improvement...Continuing research results in product improvement; therefore specifications are subject to
change without notice. For the most updated information, consult the factory directly.
Made in the U.S.A.
7Rev A