Model ULR-1 Rev A Pressure Reducing Regulator With Unloader, Sales Kit A For Product Code: ULB-5P27-431EB0N0A; 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; Standard Flow To Open Direction; OPT-56: Cleaned For Non-Oxygen Service Per Cashco Specification S-1542