Model "D" Pressure Reducing Regulator, Tfe Gaskets; 1/2" Size; Lcc Body & Spring Chamber; S7 Trim: 316SST With Virgin Teflon (V-Tfe) Seat,Fluorocarbon Elastomer;(Fkm) Diaphragm; Opt-34: 300 Lb Raised Face Flanges With 14" Face To Face Dimension; 70-150 PSIG Range Spring; Standard: Opt-25: 1/8" Npt Spring Chamber Vent Tap