Safety Valve Hard Seat (M)NPT Inlet (In.) 1/4 in (F)NPT Outlet (In.) 1/4 in Preset Setting (PSI) 350 psi Max Temp (F) 400 Degrees F Stainless Steel Body Material Stainless Steel Ball 302 SS Spring Stainless Steel Seat Standards ASME/CE/CRN Certified Air