Safety Relief Valve, Body Material Cast Bronze, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 3 in, Outlet Size 3 in, Factory Set Pressure 15 psi, Pressure Range 5 to 15 psi, Steam Capacity (Lb./Hr.) 6,843 lb/hr, Disc Material PTFE, Overall Height 9 3/8 in, Application Low Pressure Steam Heating and Supply Boilers, Seat Material Chrome Plated Seat w/ TFE Coated Brass Disc, Spring Material Rust Proofed Steel, Temp. Range 0 Degrees to 250 Degrees F, Test Lever Yes