Inlet Sizes : 1/1/2 to 6″
Inlet Ratings :ANSI Class 600, 900 and 1500
Outlet Sizes : 3″ to 8″
Outlet Ratings : ANSI Class 150 and 300
Orifice Sizes : Seven sizes – 1 through Q
Set Pressure Range : 100 psig to 1600 psig
Temp. Range : Up to 1050◦ F
Materials : Alloy and carbon steel cast body with stainless steel trim
Source : http://www.geoilandgas.com/pipeline-storage/gas-production/safety-valves
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