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, BC DIAPHRAGM, NBR STATIC SEAL, SST/TFE U-CUP DYNAMIC SEAL; NPT END CONNECTION; OPT-80: 200-450 PSIG RANGE SPRING; INTERNAL SENSING, STANDARD - FLOW TO OPEN DIRECTION;