MODEL "DAP" PILOT OPER. PRESSURE REDUCING REGULATOR(SERIES IV-P)PORV BODY SIZE 1",LARGE PISTON CONSTRUCTION; SALES KIT A; CF3M SST BODY & 316L SST COVER DOME; 17-4PH SST PLUG/CAGE/PISTON,NO DIAPHRAGM,CTFE SEAT; SPECIAL SEALS; 17-4PH SST METALIC TRIM; CTFE SEAT; FLUOROCARBON ELASTOMER (FKM) STATIC SEALS (RESISTANT TO EXPLOSIVE DECOMPRESSION), TFE U-CUP W/SST ENERGIZER DYNAMIC SEAL