Model DA1 Rev E Pressure Reducing Regulator; 1/2" Line Size; Stainless Steel Body With Carbon Steel Spring Chamber; P4 17-4PH Stainless Steel Trim, 316L Stainless Steel Cage, Polyurethane Seat, EPR Diaphragm, EPR Static Seal, EPR O-Ring Dynamic Seal; NPT End Connections; 1-5 PSIG Range Spring; Internal Sensing