Safety Relief Valve, Body Material Bronze, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 1 1/4 in, Outlet Size 1 1/2 in, Factory Set Pressure 165 psi, Disc Material Brass, Overall Height 9 5/8 in, Application Air/Gas Compressors, Intercoolers and Aftercoolers, Pressure Reducing Stations, Pressure Vessels-Containing Steam, Steam Boilers and Generators, Tanks, Receivers, Sterilizers and Autoclaves, Overall Length 5 1/4 in, Seat Material FKM, Spring Material Stainless Steel