Model "DA5" Back Pressure Regulator (Series V)-BPV; Body Size 3",Standard Diaphragm Construction; Sales Kit A; Cf3m Body, Ductile Iron Spring Chamber; 17-4ph SST Trim, 316l SST Cage, Pa Seat, Nbr Diaphragm;Nbr Static Seal, Tfe Cap Seal W/Nbr Energizer Dynamic Seal;