Model DA1 Rev E Pressure Reducing Regulator; 2" Line Size; Carbon Steel Body With Carbon Steel Spring Chamber; PB 316L Stainless Steel Trim, 316L Stainless Steel Cage, Polyurethane Seat, Fluorocarbon Diaphragm, Fluorocarbon Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal; NPT End Connections; 80-275 PSIG Range Spring, OPT-80: High Outlet Pressure Construction; Internal Sensing; Cleaned For Hydrogen Service Per Cashco Specification S-1821