Model "HP" Pressure Reducing Regulator,Graphite/Nbr Gaskets; 1" Size; Cf8m Body & Spring Chamber; S1 Trim: 316SST Metal Seat,302SST Diaphragm; Opt-30: 600 Lb Raised Face Flanges; 260-425 PSIG Range Spring (Includes Opt-80: High Outlet Pressure;Construction)