MODEL "DA4" PRESSURE LOADED REDUCING VALVE (SERIES IV)-PLPRV BODY SIZE 1",OPT-81: FULL DIAPHRAGM SUPPORT CONSTRUCTION; SALES KIT A; CF3M BODY,316L SST LOADING CHAMBER; SPECIAL TRIM MATERIALS; ETHYLENE PROPYLENE(EPR) STATIC SEALS,TFE U-CUP W/SST ENERGIZER DYNAMIC SEAL; PER CASHCO DRAWING NUMBER 54272 - 17-4 PH SST TRIM W/ CTFE SEAT, EPR DIAPHRAGM WITH PTFE COVER ON PROCESS SIDE;