Model "DA1" Pressure Reducing Regulator (Series I); Body Size 1-1/4",Standard Diaphragm Construction; Cf3m Body, 316l SST Spring Chamber; 17-4ph SST Trim, 316l SST Cage, V-Tfe Seat, Fk Diaphragm,;Fk Static Seal, SST/Tfe U-Cup Dynamic Seal; Npt End Connection; Opt-80: 100-350 PSIG Range Spring; Internal Sensing, Standard - Flow To Open Direction