Adjustable Back Pressure Relief Valve Body Material Bronze Inlet Type FNPT Outlet Type FNPT Inlet Size 1 1/2 in Outlet Size 1 1/2 in Factory Set Pressure 120 psi Disc Material Stainless Steel Overall Height 10 3/4 in Overall Length 7 1/2 in Seat Material Monel Spring Material Stainless Steel Temp Range 40 Degrees to 450 Degrees F Test Lever No Standards CRN CSA