MODEL "DA1" PRESSURE REDUCING REGULATOR (SERIES I) BODY SIZE 1/2",STANDARD DIAPHRAGM CONSTRUCTION; DUCTILE IRON BODY & SPRING CHAMBER; 17-4PH SST TRIM, 316L SST CAGE, PA SEAT, FKM DIAPHRAGM, FKM STATIC SEAL, SST/TFE U-CUP DYNAMIC SEAL; NPT END CONNECTION; 10-35 PSIG RANGE SPRING; INTERNAL SENSING, STANDARD - FLOW TO OPEN DIRECTION;