H7209 Safety Relief Valve Body Material Brass/Bronze Inlet Type MNPT Outlet Type FNPT Inlet Size 1/2 in Outlet Size 3/4 in Factory Set Pressure 275 psi Disc Material Stainless Steel Overall Height 7 3/8 in Application Air Gas Overall Length 7 3/8 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