Safety Valve, Soft Seat, (M) NPT Inlet (In. ) 3/4 in, (F) NPT Outlet (In. ) 1/2 in, Preset Setting (PSI) 150 psi, 601 cfm Rated CFM @ Set Pressure, Max. Temp. (F) 400 Degrees F, Stainless Steel Body Material, Viton Seal, Stainless Steel Ball, 17-7 SS Spring, Stainless Steel Seat, Standards ASME Boiler and Pressure Vessel Code Section VIII Division 1, CRN, ISO 9001, PED 2014/68/EU ( CE), Air, Gas