H7213 Safety Relief Valve Body Material Brass/Bronze Inlet Type MNPT Outlet Type FNPT Inlet Size 1 1/2 in Outlet Size 1 1/2 in Factory Set Pressure 15 psi Disc Material Stainless Steel Overall Height 9 1/4 in Application Air Gas Overall Length 9 1/4 in Seat Material Brass/Stainless Steel Spring Material Stainless Steel Temp Range -320 Degrees to 406 Degrees F Test Lever Yes Standards ASME Section VIII / CRN