Model "B2", Back Pressure Regulator; 3/8" Size, Cv'=0.30; 316l SST Body, 316l SST Spring Chamber; 302 SST W/Tefzel Ring Diaphragm, Viton Seat, 316l SST W/Pctfe Seal,;Port Configuration "D"; Fnpt End Connection; 10-750 PSIG Range Spring; 0-1000 PSIG (0-69.0 BARG) Inlet Gauge