D4488 Safety Relief Valve Body Material Bronze Inlet Type MNPT Outlet Type FNPT Inlet Size 2 in Outlet Size 2 1/2 in Factory Set Pressure 200 psi Disc Material B21 Alloy 485 Overall Height 13 5/8 in Application Air and Gas Compressors Pressure Reducing Stations etc Overall Length 7 1/4 in Seat Material Viton Spring Material Stainless Steel Temp Range -60 Degrees to 406 Degrees F Test Lever Yes Standards Air/Gas UV ASME Section V111 ASTM A-313 TY 631 National Board Certified