Model "DA1" Pressure Reducing Regulator (Series I); Body Size 1",Standard Diaphragm Construction; Carbon Steel Body & Carbon Steel Spring Chamber; 17-4ph SST Trim, 316l SST Cage, Pa Seat, Fkm Diaphragm,;Fkm Static Seal, SST/Tfe U-Cup Dynamic Seal; PN16 Raised Face Din Flanges; 10-35 PSIG Range Spring; Internal Sensing, Standard - Flow To Open Direction