Model "DA1" Pressure Reducing Regulator (Series I); Body Size 2",Standard Diaphragm Construction; Cf3m Body, 316l SST Spring Chamber; 316l SST Trim, V-Tfe Seat, Be-Cu Diaphragm,;SST/Tfe U-Cup Static Seal, SST/Tfe U-Cup Dynamic Seal; 300 Lb Raised Face Flanges; 50-150 PSIG Range Spring; Internal Sensing, Standard - Flow To Open Direction