Inlet Sizes : 1/1/2 to 6″
Inlet Ratings :ANSI Class 250
Outlet Sizes : 2/1/2″ through 4″
Outlet Ratings : ANSI Class 125
Orifice Sizes : Eight Sizes – H through Q
Set Pressure Range : 15 psig to 250 psig
Temp. Range : -20◦F to 420◦ F
Materials : Cast iron body with brass trim
Source : http://www.geoilandgas.com/pipeline-storage/gas-production/safety-valves
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