Model "HP" Pressure Reducing Regulator,Graphite/Nbr Gaskets; 1" Size; Wcb Body & Spring Chamber; S36 Trim: 316SST With Tfe Seat,302SST Diaphragm; Opt-30: 600 Lb Raised Face Flanges; 30-150 PSIG Range Spring; Opt-1+6: Differental Construction With Closing Cap; Opt-25: 1/4" Npt Spring Chamber Vent Tap