Model ULR-1 Rev A Pressure Reducing Regulator With Unloader; 1-1/2" Line Size; Bronze Body With Bronze Loading Chamber; MK Monel Trim, Polyurethane Seat, Fluorosilicone Diaphragm, Fluorosilicone Static Steal, PTFE Cap With Fluorosilicone Energizer Dynamic Seal, GF-TFE Wiper; NPT End Connections; Lower Spring 2-5 PSIG Range; Internal Sensing With Standard Flow To Open Direction; With Unloader: 1/4" NPT, Bronze Body And Spring Chamber, S2 Trim, Stainless Steel Metal Seat And Diaphragm, Spring Range 40 - 125 PSIG; Brass Filter, Copper Tubing, Brass Fittings; OPT-55: Cleaned For Oxygen Service Per Cashco Specification S-1134