Model "8310HP" Pressure Reducing Regulator, Graphite/Nbr Gaskets; 4" Size; Wcb Body & Spring Chamber; S5 Trim: 316SST Metal Seat,Fluorocarbon Elastomer (Fkm) Diaphragm; 150 Lb Raised Face Flanges; 130-200 PSIG Range Spring (Includes Opt-80: High Outlet Pressure;Construction)