Model ULR-1 Rev A Pressure Reducing Regulator With Unloader; 3" Line Size; Carbon Steel Body With Carbon Steel Loading Chamber; P2 17-4PH Stainless Steel Trim, 316L Stainless Steel Cage, Polyurethane Seat, Neoprene Diaphragm, BUNA-N Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal; ASME 150 Raised Face Flanged End Connections; Lower Spring 2-5 PSIG Range; Internal Sensing With Standard Flow To Open Direction; With Unloader: 1/4" NPT, Bronze Body And Spring Chamber, S2 Trim, Stainless Steel Metal Seat And Diaphragm, Spring Range 40 - 125 PSIG; Brass Filter, Copper Tubing, Brass Fittings; OPT-56: Cleaned For Non-Oxygen Service Per Cashco Specification S-1542