Model DA1 Rev E Pressure Reducing Regulator; 1" Line Size; Ductile Iron Body With Ductile Iron Spring Chamber; P3 17-4PH Stainless Steel Trim, 316L Stainless Steel Cage, CTFE Seat, Neoprene Diaphragm, BUNA-N Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal; NPT End Connections; 20-80 PSIG Range Spring; External Sensing