1700

Inlet Sizes : 1/1/2 to 6″

Inlet Ratings :ANSI Class 600 to 4500

Outlet Sizes : 3″ to 10″

Outlet Ratings : ANSI Class 150 and 300

Orifice Sizes : Eleven sizes – 1 through RR

Set Pressure Range : 100 psig to 5360psig

Temp. Range : Up to 1120◦ F

Materials : Alloy and carbon steel cast body with stainless steel trim

Source : http://www.geoilandgas.com/pipeline-storage/gas-production/safety-valves