Model "DA6" Dome Loaded Back Pressure Regulator (Series VI)-PLBPV; Body Size 2",Standard Diaphragm Construction; Cf3m Body,316l SST Loading Chamber; 17-4ph SST Trim, 316l SST Cage, Gf-Tfe Seat, Fkm Diaphragm;Fkm Static Seal, Tfe Cap Seal W/Fkm Energizer Dynamic Seal; Npt End Connection; External Sensing, Reverse - Flow To Open Direction