Model "DA1" Pressure Reducing Regulator (Series I); Body Size 3/4",Standard Diaphragm Construction; Bronze Body & Spring Chamber; 17-4ph SST Trim, 316l SST Cage, Pa Seat, Bc Diaphragm,;Nbr Static Seal, O-Ring Dynamic Seal; Npt End Connection; 30-150 PSIG Range Spring; Internal Sensing, Standard - Flow To Open Direction