Model "DA1" Pressure Reducing Regulator (Series I); Body Size 1",Standard Diaphragm Construction; Ductile Iron Body & Spring Chamber; 17-4ph SST Trim, 316l SST Cage, Gf-Tfe Seat, Fk Diaphragm,;Fk Static Seal, SST/Tfe U-Cup Dynamic Seal; Npt End Connection; 30-150 PSIG Range Spring; Internal Sensing, Standard - Flow To Open Direction