Model DA4 Rev E Pressure Loaded Reducing Regulator; 3" Line Size; Stainless Steel Body With Stainless Steel Loading Chamber; MJ Monel M Trim, Polyurethane Seat, EPR Diaphragm, EPR Static Seal, PTFE Cap With EPR Energizer And GF-TFE Wiper Dynamic Seal; OPT-30: Mates With ASME 300 Raised Face Flanges; Lower Spring 2-5 PSIG Range; Internal Sensing; OPT-56: Cleaned For Non-Oxygen Service Per Cashco Specification S-1542