Pilot-Operated Pressure Regulator, Series E, Body Material Cast Iron, Inlet Size 3/4 in, Outlet Size 3/4 in, Length 4 3/4 in, Height 12 7/8 in, Pressure Adjustment Range 3 to 20 psi, Max. Temp. 450 Degrees F, Max. Pressure 250 psi, Standards ASME B16.1 with ANSI Class 4 Seat Tightness