Model HP Rev A Pressure Reducing Regulator, PTFE/FKM Gaskets (Opt-45); 1/2" Line Size; Stainless Steel Body With Stainless Steel Spring Chamber; M36 Trim: Monel With PTFE Seat, 302 Stainless Steel Diaphragm; Special DN25 PN40 Reducing Flanges With 280 mm Face to Face; 260-425 PSIG Range Spring (Includes OPT-80: High Outlet Pressure;Construction); OPT-55: Cleaned For Oxygen Service Per Cashco Specification S-1134