Model "DAP" Pilot Oper. Pressure Reducing Regulator(Series IV-P)PORV; Body Size 1-1/2",Large Piston; Sales Kit A; Cf3m SST Body & 316l SST Cover Dome; 17-4ph SST Plug/Cage/Piston,No Diaphragm,Vtfe Seat; Buna-N(Nbr) Static Seals,Tfe U-Cup W/SST Energizer Dynamic Seal;