Model DA1 Rev E Pressure Reducing Regulator; 1" Line Size; Super Duplex Stainless Steel Body With Stainless Steel Spring Chamber; S9 316L Stainless Steel Trim, PTFE Seat, FEP Laminated Fluorosilicone Diaphragm, Fluorosilicone Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal; OPT-30: Mates With ASME 150 Raised Face Flanges; 30-150 PSIG Range Spring; Internal Sensing, Standard - Flow To Open Direction; OPT-55: Cleaned For Oxygen Service Per Cashco Specification S-1134