MODEL "DA2" DIFFERENTIAL PRESSURE REDUCING REGULATOR (SERIES II)-PDRV BODY SIZE 1/2",STANDARD DIAPHRAGM CONSTRUCTION; SALES KIT A; CARBON STEEL BODY & CARBON STEEL SPRING CHAMBER,1/8" STEEL PETCOCK VENT; P TRIM: 17-4PH SST TRIM WITH GF-TFE SEAT,6-PLY TFE+HK ELASTOMER DIAPHRAGM; REINFORCED TFE(BRZ-FILL) STATIC SEALS,GF-TFE PISTON RING ASSEMBLY W/SST ENERGIZER DYNAMIC SEAL,GF-TFE WIPER