Adjustable Back Pressure Relief Valve, Body Material Bronze, Inlet Type FNPT, Outlet Type FNPT, Inlet Size 1/2 in, Outlet Size 1/2 in, Factory Set Pressure 50 psi, Disc Material Metal, Overall Height 7 in, Application Pump systems, hydraulic systems, oil burningequipment, rams, presses and lifts, chemicalsprocesses, waste treatment, desalination andcar washes, Overall Length 3 1/4 in, Seat Material Bronze, Spring Material Stainless Steel, Temp. Range 40 Degrees to 450 Degrees F