POP Safety Relief Valve, Body Material Stainless Steel, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 1 in, Outlet Size 1 1/2 in, Factory Set Pressure 200 psig, Pressure Range 15 to 600 psi, Disc Material 316 Stainless Steel, Overall Height 5 5/8 in, Overall Length 9 1/2 in, Seat Material Metal, Spring Material Stainless Steel, Temp. Range -320 Degrees to 800 Degrees F, Test Lever Test Lever Included, Standards CF8M (1.4408), CRN, NSF