Model DA5 Rev E Back Pressure Regulator; 1/2" Line Size; Stainless Steel Body With Ductile Iron Spring Chamber; SN 316L Stainless Steel Trim, PTFE Seat, Beryllium Copper Diaphragm, Stainless Steel/PTFE U-Cup Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal; NPT End Connections; 30-150 PSIG Range Spring; Internal Sensing