Model DA1 Rev E Pressure Reducing Regulator; 1/2" Line Size; Super Duplex Stainless Steel Body With Super Duplex Stainless Steel Spring Chamber; HD Hastelloy Trim, GF-TFE Seat, Fluorocarbon Diaphragm, Fluorocarbon Static Seal, Hastelloy/PTFE U-Cup Dynamic Seal; OPT-30: Mates With ASME 300 Raised Face Flanges; 30-150 PSIG Range Spring; Internal Sensing