Safety Relief Valve, Body Material Bronze, Inlet Type MNPT, Outlet Type FNPT, Inlet Size 1 1/2 in, Outlet Size 2 in, Factory Set Pressure 100 psi, Disc Material Bronze, Overall Height 10 in, Application Air, Gas, Overall Length 2 3/4 in, Seat Material Metal, Spring Material ASTM A-313 TY 631, Temp. Range -60 Degrees to 406 Degrees F, Test Lever Yes, Compliance Section VIII Air/Gas