Safety Relief Valve, Body Material Cast Iron, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 3 in, Outlet Size 3 in, Factory Set Pressure 15 psi, Steam Capacity (Lb./Hr.) 6,949 lb/hr, Disc Material Bronze, Overall Height 8 3/4 in, Application Low Pressure Steam Heating Boilers, Overall Length 4 in, Seat Material Brass, Spring Material Steel, Temp. Range 0 Degrees to 250 Degrees F, Test Lever Test Lever Included, Compliance Section IV Steam, Standards ASME Code HV