Adjustable Back Pressure Relief Valve Body Material Bronze Inlet Type FNPT Outlet Type FNPT Inlet Size 1/2 in Outlet Size 1/2 in Factory Set Pressure 400 psi Disc Material Metal Overall Height 7 in Application Liquids Overall Length 3 1/4 in Seat Material Bronze Spring Material Stainless Steel Temp Range 40 Degrees to 450 Degrees F Test Lever No Standards ASME Section IV CRN CSA