Safety Relief Valve, Body Material Bronze, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 1/2 in, Outlet Size 3/4 in, Factory Set Pressure 250 psi, Disc Material Brass, Overall Height 6 1/2 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 1 5/8 in, Seat Material Metal, Spring Material Stainless Steel