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 150 psi, Pressure Range 0 to 300 psi, 0 BtuH BtuH, Steam Capacity (Lb./Hr.) 325 lb/hr, Disc Material Bronze, Overall Height 6 7/8 in, Overall Length 6 7/8 in, Seat Material Bronze, Spring Material Stainless Steel, Temp. Range 0 Degrees to 406 Degrees F, Test Lever Test Lever Not Included, Standards ASME Code UV, CE, CRN, NB