Safety Relief Valve, Body Material Bronze, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 3/4 in, Outlet Size 3/4 in, Factory Set Pressure 150 psi, Pressure Range 75 to 150 psi, 500,000 BtuH, Disc Material Silicone, Overall Height 3 3/8 in, Application Pressure Only Relief Valve, Overall Length 3 3/8 in, Seat Material Silicone, Spring Material Stainless Steel, Temp. Range 0 Degrees to 210 Degrees F, Test Lever Yes, Compliance ANSI Z21.22/CSA 4.4, Standards ASME