PRESSURE/VACUUM RELIEF VALVES
MODELS1200A,1201B,1202B,1203A
MODELS1200A,1201B,1202B,1203A
TheGrothModels1200A,1201B,1202Band1203APressure/VacuumReliefValvesare designedtoprotectyourtankfromdamagecreatedbyoverpressureorexcessivevacuum. Costlyproductevaporationlossesduetonormaltank“breathing”aregreatlyreduced. Becausethe1200Seriesproductsretaintoxicvapors,atmosphericcontaminationis minimizedwhichhelpstoprovideincreasedfireprotectionandsafety.
Technical Details
•Sizes:2”(DN50)through12”(DN300)
•PressureSettings:0.5oz/in2to15psig(2.15mbargto1.03barg)
•VacuumSettings:0.5oz/in2to12psig(2.15mbargto506mbarg)
•Material:Aluminum,CarbonSteel,StainlessSteel,Fiberglass,specialmaterials availableuponrequest
Features
•ModularConstruction
•Cushionedairseating
•Superiorperformingfluoropolymerdiaphragms
•Selfdraininghousingbodyanddriprings
•PeripheralGuidingandcenterstabilizingsystemforalignment
•PEDandATEXCertified
Options
•Buna-N,FKM
•SteamJacketValve
SPECIFICATIONS
2(50)12(52.7)13.63(346)14(355)9.50(241)13.37(340)19.87(505)9.50(241)16(7)
3(80)11(48.3)18(457)15(381)11.50(292)18.37(467)22.75(578)13(330)21(9)
4(100)11(48.3)19.75(502)17.50(444)13(330)19.50(495)27.50(699)13(330)31(14)
6(150)16(70.3)27.75(704)22.25(565)19(483)27.75(705)37.75(959)19.50(495)57(26)
8(200)16(70.3)33.88(860)27.50(699)23.63(600)33.62(854)44.50(1130)23.50(597)75(34)
10(250)16(70.3)40.88(1038)28.88(733)30.75(781)38(965)53(1346)25.50(648)116(53) 12(300)16oz/in2 (70.3gm/cm2)46(1168)32.88(835)36(914)40.50(1029)55.62(1413)25.50(648)157(71)
†W.P.=WorkingPressure.//‡Onspringloadedvalves,changemodelnumber. ◊150#ANSIdrillingcompatibility,F.F.onaluminumandR.F.oncarbonsteelandstainlesssteelalloys. Fiberglassdimensionsonrequest.16oz/in2setwithspacer.SSsetweights-consultfactory.*Somesizesrequirenon-ferrouscomponentstoachieve0.5oz/in2setting. Specificationssubjecttochangewithoutnotice.Certifieddimensionsavailableuponrequest.
Flow Capacity Calculation
Flowcapacityvalueslistedabovearebasedonfullopen valvesat100%overpressure.Readtheflowcapacityat 100%overpressuredirectlyfromthetableabove.Use linearinterpolationifthesetpressureisnotlisted.If theallowableoverpressureislessthan100%,modify theflowcapacityusingtheappropriate“C”factorfrom thetable.Ifallowableoverpressureismorethan100%, consultyourGrothRepresentative.
Calculatethepercentageoverpressurebythefollowing formula.Notethatallpressuresaregaugepressure expressedinthesameunitsofmeasure.
Pf=Flowingpressure
Ps=Setpressure
%OP=[(Pf-Ps)/Ps]x100
Calculateflowcapacityatlessthan100%overpressure accordingtothefollowingexample.
Example Flow Capacity Calculation
6”Model1200A1.ReadflowcapacityatsetpressurefromtableFlow=131,000SCFH
4InWCsetpressure[Ps]2.Calculateoverpressure%OP=[(7-4)/4]x100=75%
7InWCflowingpressure[Pf]3.Read“C”factorfromtable“C”=0.87
4.CalculateflowcapacityFlow=0.87x131,000=113,970SCFH
MODEL1200A/1202BPRESSURERELIEFCAPACITY
Flow Capacity Calculation
Flowcapacityvalueslistedabovearebasedonfullopen valvesat100%overpressure.Readtheflowcapacityat 100%overpressuredirectlyfromthetableabove.Use linearinterpolationifthesetpressureisnotlisted.If theallowableoverpressureislessthan100%,modify theflowcapacityusingtheappropriate“C”factorfrom thetable.Ifallowableoverpressureismorethan100%, consultyourGrothRepresentative.
Calculatethepercentageoverpressurebythefollowing formula.Notethatallpressuresaregaugepressure expressedinthesameunitsofmeasure.
Pf=Flowingpressure
Ps=Setpressure
%OP=[(Pf-Ps)/Ps]x100
Calculateflowcapacityatlessthan100%overpressure accordingtothefollowingexample.
Example Flow Capacity Calculation
Example to find “C” factor from table:
Read“C”factorfor75%overpressureatintersectionof row70andcolumn5
“C”factorat75%OP=0.87
6”Model1200A1.ReadflowcapacityatsetpressurefromtableFlow=3,670NCMH 100mmWCSetPressure[Ps]2.Calculateoverpressure%OP=[(175-100)/100]x100=75% 175mmWCFlowingPressure[Pf]3.Read“C”factorfromtable“C”=0.87
4.CalculateflowcapacityFlow=0.87x3,670=3,193NCMH
AirFlowCapacityat100%Over-Vacuum(DoubleSetVacuum)
0.870.504.7010.316.034.760.591.1129 1.000.585.0511.017.237.365.097.9138 1.731.006.6314.522.649.085.3129182
Flow Capacity Calculation
Flowcapacityvalueslistedabovearebasedonfullopen valvesat100%over-vacuum.Readtheflowcapacityat 100%over-vacuumdirectlyfromthetableabove.Use linearinterpolationifthesetvacuumisnotlisted.
Iftheallowableover-vacuumislessthan100%,modify theflowcapacityusingtheappropriate“C”factorfrom thetable.Ifallowableover-vacuumismorethan100%, consultyourGrothRepresentative.
Calculatethepercentageover-vacuumbythefollowing formula.Notethatallpressuresaregaugepressure expressedinthesameunitsofmeasure.
Pf=Flowingpressure
Ps=Setpressure
%OV=[(Pf-Ps)/Ps]x100
Calculateflowcapacityatlessthan100%over-vacuum accordingtothefollowingexample.
Example Flow Capacity Calculation
“C”FactorTable
700.840.850.850.860.860.870.880.880.890.89
Example to find “C” factor from table: Read“C”factorfor75%over-vacuumatintersectionof row70andcolumn5 “C”factorat75%OV=0.87
6”Model1200A1.ReadflowcapacityatsetvacuumfromtableFlow=74,000SCFH
4InWCSetVacuum[Ps]2.Calculateover-vacuum%OV=[(7-4)/4]x100=75% 7InWCFlowingVacuum[Pf]3.Read“C”factorfromtable“C”=0.87
4.CalculateflowcapacityFlow=0.87x74,000=64,380SCFH
AirFlowCapacityat100%Over-Vacuum(DoubleSetVacuum) 1000NormalCubicMetersperHourat0°C SetVacuum(Ps)SizeIn(mm) mmWCmb2(50)3(80)4(100)6(150)8(200)10(250)12(300) 222.160.130.290.450.981.712.583.65 504.900.200.440.681.482.583.885.48 757.350.240.530.831.813.154.746.70 1009.800.280.620.962.083.625.467.72
Flow Capacity Calculation
Flowcapacityvalueslistedabovearebasedonfullopen valvesat100%over-vacuum.Readtheflowcapacityat 100%over-vacuumdirectlyfromthetableabove.Use linearinterpolationifthesetvacuumisnotlisted.
Iftheallowableover-vacuumislessthan100%,modify theflowcapacityusingtheappropriate“C”factorfrom thetable.Ifallowableover-vacuumismorethan100%, consultyourGrothRepresentative.
Calculatethepercentageover-vacuumbythefollowing formula.Notethatallpressuresaregaugepressure expressedinthesameunitsofmeasure.
Pf=Flowingpressure
Ps=Setpressure
%OV=[(Pf-Ps)/Ps]x100
Calculateflowcapacityatlessthan100%over-vacuum accordingtothefollowingexample.
Example Flow Capacity Calculation
“C”FactorTable
700.840.850.850.860.860.870.880.880.890.89
Example to find “C” factor from table: Read“C”factorfor75%over-vacuumatintersectionof row70andcolumn5
“C”factorat75%OV=0.87
6”Model1200A1.ReadflowcapacityatsetvacuumfromtableFlow=2,080NCMH 100mmWCSetVacuum[Ps]2.Calculateover-vacuum%OV=[(175-100)/100]x100=75% 175mmWCFlowingVacuum[Pf]3.Read“C”factorfromtable“C”=0.87
4.CalculateflowcapacityFlow=0.87x2,080=1,810NCMH
MODEL1201B/1203APRESSURERELIEFCAPACITY
Flow Capacity Calculation
Flowcapacityvalueslistedabovearebasedonfullopen valvesat100%overpressure.Readtheflowcapacityat 100%overpressuredirectlyfromthetableabove.Use linearinterpolationifthesetpressureisnotlisted.If theallowableoverpressureislessthan100%,modify theflowcapacityusingtheappropriate“C”factorfrom thetable.Ifallowableoverpressureismorethan100%, consultyourGrothRepresentative.
Calculatethepercentageoverpressurebythefollowing formula.Notethatallpressuresaregaugepressure expressedinthesameunitsofmeasure.
Pf=Flowingpressure
Ps=Setpressure
%OP=[(Pf-Ps)/Ps]x100
Calculateflowcapacityatlessthan100%overpressure accordingtothefollowingexample.
Example Flow Capacity Calculation
Example to find “C” factor from table:
Read“C”factorfor75%overpressureatintersectionof row70andcolumn5
“C”factorat75%OP=0.83
6”Model1201B1.ReadflowcapacityatsetpressurefromtableFlow=448,000SCFH
4psigSetPressure[Ps]2.Calculateoverpressure%OP=[(7-4)/4]x100=75%
7psigFlowingPressure[Pf]3.Read“C”factorfromtable“C”=0.83
4.CalculateflowcapacityFlow=0.83x448,000=371,840SCFH
AirFlowCapacityat100%Overpressure(DoubleSetPressure)
1000NormalCubicMetersperHourat0°C SetPressure (Ps) SizeIn(mm)
barg2(50)3(80)4(100)6(150)8(200)10(250)12(300) 0.070.821.572.726.1610.115.521.7
0.100.991.893.287.4512.218.826.2 0.151.232.364.099.2815.223.432.6 0.201.432.764.8010.917.927.438.3 0.251.623.145.4412.320.331.143.4 0.301.793.486.0413.722.534.548.2 0.351.953.816.6115.024.637.852.7 0.402.104.127.1416.226.640.957.0 0.452.254.417.6617.428.543.861.1 0.502.394.708.1618.530.446.665.1 0.552.524.988.6419.632.249.468.9 0.602.655.259.1020.633.952.172.6 0.702.895.7610.022.737.257.279.7 0.803.136.2510.824.640.462.186.5 0.903.356.7211.726.543.566.793.1 1.003.567.1812.528.346.471.299.4
Flow Capacity Calculation
Flowcapacityvalueslistedabovearebasedonfullopen valvesat100%overpressure.Readtheflowcapacityat 100%overpressuredirectlyfromthetableabove.Use linearinterpolationifthesetpressureisnotlisted.If theallowableoverpressureislessthan100%,modify theflowcapacityusingtheappropriate“C”factorfrom thetable.Ifallowableoverpressureismorethan100%, consultyourGrothRepresentative.
Calculatethepercentageoverpressurebythefollowing formula.Notethatallpressuresaregaugepressure expressedinthesameunitsofmeasure.
Pf=Flowingpressure
Ps=Setpressure
%OP=[(Pf-Ps)/Ps]x100
Calculateflowcapacityatlessthan100%overpressure accordingtothefollowingexample.
Example Flow Capacity Calculation
%OP0123456789 10•••ConsultFactory•••
Example to find “C” factor from table: Read“C”factorfor75%overpressureatintersectionof row70andcolumn5
“C”factorat75%OP=0.83
6”Model1201B1.ReadflowcapacityatsetpressurefromtableFlow=16,200NCMH
0.4bargSetPressure[Ps]2.Calculateoverpressure%OP=[(0.7-0.4)/0.4]x100=75% 0.7bargFlowingPressure[Pf]3.Read“C”factorfromtable“C”=0.83
4.CalculateflowcapacityFlow=0.83x16,200=13,446NCMH
Flow Capacity Calculation
Flowcapacityvalueslistedabovearebasedonfullopen valvesat100%over-vacuum.Readtheflowcapacityat 100%over-vacuumdirectlyfromthetableabove.Use linearinterpolationifthesetpressureisnotlisted.If theallowableover-vacuumislessthan100%,modify theflowcapacityusingtheappropriate“C”factorfrom thetable.Ifallowableover-vacuumismorethan100%, consultyourGrothRepresentative.
Calculatethepercentageover-vacuumbythefollowing formula.Notethatallpressuresaregaugepressure expressedinthesameunitsofmeasure.
Pf=Flowingpressure
Ps=Setpressure
%OV=[(Pf-Ps)/Ps]x100
Calculateflowcapacityatlessthan100%over-vacuum accordingtothefollowingexample.
Example Flow Capacity Calculation
Example to find “C” factor from table:
Read“C”factorfor75%over-vacuumatintersectionof row70andcolumn5
“C”factorat75%OV=0.83
6”Model1202B1.ReadflowcapacityatsetvacuumfromtableFlow=166,000SCFH
2psigSetVacuum[Ps]2.Calculateover-vacuum%OV=[(3.50-2.0)/2.0]x100=75% 3.5psigFlowingVacuum[Pf]3.Read“C”factorfromtable“C”=0.83
4.CalculateflowcapacityFlow=0.83x166,000=137,780SCFH
barg2(50)3(80)4(100)6(150)8(200)10(250)12(300) 0.070.410.901.553.525.778.8712.4
0.100.481.061.834.166.8310.514.6 0.110.511.111.924.357.1411.015.3 0.120.531.151.994.537.4311.415.9 0.130.551.202.074.697.7011.816.5 0.140.561.242.144.857.9612.217.1 0.150.581.272.205.008.2112.617.6 0.160.601.312.275.148.4413.018.1 0.170.611.352.335.288.6613.318.6 0.180.631.382.385.418.8813.619.0 0.190.641.412.445.539.0813.919.4 0.200.661.442.495.659.2714.219.8 0.220.681.492.585.869.6214.820.6 0.240.701.542.676.059.9315.221.3 >0.24CONSULTFACTORYFORVACUUMSETTINGSGREATERTHAN0.24BARG
Flow
Capacity Calculation
Flowcapacityvalueslistedabovearebasedonfullopen valvesat100%over-vacuum.Readtheflowcapacityat 100%over-vacuumdirectlyfromthetableabove.Use linearinterpolationifthesetpressureisnotlisted.If theallowableover-vacuumislessthan100%,modify theflowcapacityusingtheappropriate“C”factorfrom thetable.Ifallowableover-vacuumismorethan100%, consultyourGrothRepresentative.
Calculatethepercentageover-vacuumbythefollowing formula.Notethatallpressuresaregaugepressure expressedinthesameunitsofmeasure.
Pf=Flowingpressure
Ps=Setpressure
%OV=[(Pf-Ps)/Ps]x100
Calculateflowcapacityatlessthan100%over-vacuum accordingtothefollowingexample.
Example Flow Capacity Calculation
Example to find “C” factor from table:
Read“C”factorfor72%over-vacuumatintersectionof row40andcolumn
“C”factorat42%OV=0.55
6”Model1202B1.ReadflowcapacityatsetvacuumfromtableFlow=4,530NCMH
0.12bargSetVacuum[Ps]2.Calculateover-vacuum%OV=[(0.17-0.12)/0.12]x100=42% 0.17bargFlowingVacuum[Pf]3.Read“C”factorfromtable“C”=0.55
4.CalculateflowcapacityFlow=0.55x4,530=2,492NCMH
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HOWTOORDER
Foreasyordering,selectpropermodelnumbers
1200AWeightLoaded 1201BPressureSpring 1202BVacuumSpring 1203APressure&VacuumSprings1=Aluminum
PalletMaterial
SeatMaterial
BodyMaterial
3=CarbonSteel
5=StainlessSteel
6=VinylEsterResin
7=Furan
Z=Special
Notes
•Includemodelnumberandsettingwhenordering.
•Forspecialoptions,consultfactory.
•Whenorderingsteamjacket,includesteampressure/temperature.
*Stainlesssteelguides,stemsarestandardwithaluminumandcarbonsteelbodies. Stainlesssteelseatsstandardwithcarbonsteelbodies Example
Indicatesa2"Model1200AwithAluminumBodyandSeat,StainlessSteelPallet,FluoropolymerSeatDiaphragm,andnootheroptions.
O=NoOptions
Z=SpecialOptions
O=NoJacket
J=SteamJacket
S=Spacer
H=SteamJacket& Spacer
DiaphragmMaterial (Seat):
B=Buna-N
T=Fluoropolymer
V=FKM
Z=Special
