The Fisher R600 series second-stage regulators are designed to reduce the outlet pressure from a first-stage regulator in domestic applications. Inlet and outlet gauge taps allow for easy system testing. The combination of a high capacity relief valve and large vent provide overpressure protection that exceeds UL standards. When used in conjunction with an R122H or R622H, the two-stage system will limit the downstream pressure to 2 psig even in a double failure situation.

Maximum inlet pressure is 10 psig (0.69 bar) with propane flow capacities up to 1,500,000 BTU/hr. Connections are available in 1/2 or 3/4in female NPT for both inlet and outlet. The 3/4in NPT screened vent provides reliable overpressure relief. Operating temperature range is -20 to 160°F (-29 to 71°C).

The regulator has a 20-year recommended replacement life and is UL listed and CRN certified. Fisher equipment must be installed, operated and maintained in accordance with Federal, state, and local codes and Fisher instructions. Only personnel trained in the proper procedures, codes, standards and regulations of the LP-gas industry should install and service this equipment.