Safety Relief Valve Body Material Bronze Inlet Type MNPT Outlet Type FNPT Inlet Size 1 1/4 in Outlet Size 1 1/2 in Factory Set Pressure 150 psi Disc Material Bronze Overall Height 9 5/8 in Application Steam Overall Length 2 3/8 in Seat Material Metal Spring Material ASTM A-313 TY 631 Temp Range -60 Degrees to 406 Degrees F Test Lever Yes Compliance Section I Steam