Model DA1 Rev E Pressure Reducing Regulator; 1/2" Line Size; Carbon Steel Body With Ductile Iron Spring Chamber; P1 17-4PH Stainless Steel Trim, 316L Stainless Steel Cage, Polyurethane Seat, Neoprene Diaphragm, BUNA-N Static Seal, Neoprene O-Ring Dynamic Seal; NPT End Connections; 1-5 PSIG Range Spring; Internal Sensing, Standard - Flow To Open Direction