Model 8310LP Rev D Pressure Reducing Regulator, Graphite/NBR Gaskets; 1-1/2" Line Size; Carbon Steel Body With Carbon Steel Spring Chamber; S7 Trim: PTFE Seat, Fluorocarbon Elastomer Diaphragm; OPT-30: Mates With ASME 150 Raised Face Flanges; 3-10 PSIG Range Spring; OPT-56: Cleaned For Non-Oxygen Service Per Cashco Specification S-1542