Model "DA1" Pressure Reducing Regulator (Series I); Body Size 1",Standard Diaphragm Construction; Cf3m Body, 316l SST Spring Chamber; 17-4ph SST Trim, 316l SST Cage, Nbr Seat, Nbr Diaphragm,;Nbr Static Seal, SST/Tfe U-Cup Dynamic Seal; 150 Lb Raised Face Flanges; 1-10 PSIG Range Spring; External Sensing, Standard - Flow To Open Direction