D57-1TN7-1J800000E

Model "DA5" Back Pressure Regulator (Series V)-BPV; Body Size 1-1/4",Standard Diaphragm Construction; Ductile Iron Body & Spring Chamber; 17-4ph/Monel/17-4ph Trim, V-Tfe Seat, Be-Cu Diaphragm;SST/Tfe U-Cup, Static Seal, SST/Tfe U-Cup Dynamic Seal; Npt End Connection; 10-70 PSIG Range Spring; Large Internal Sensing, Reverse - Flow To Open Direction