Safety Valve, Soft Seat, (M) NPT Inlet (In. ) 1/2 in, (F) NPT Outlet (In. ) 5/16 in, Preset Setting (PSI) 75 psi, 150 cfm Rated CFM @ Set Pressure, Max. Temp. (F) 400 Degrees F, Brass Body Material, Silicone Seal, Brass Ball, 17-7 SS Spring, Brass Seat, Standards ASME Boiler and Pressure Vessel Code Section VIII Division 1, CRN, ISO 9001, PED 2014/68/EU ( CE), Air, Gas