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, NBR DIAPHRAGM, NBR STATIC SEAL, O-RING DYNAMIC SEAL; NPT END CONNECTION; 30-150 PSIG RANGE SPRING; EXTERNAL SENSING, STANDARD - FLOW TO OPEN DIRECTION;