Emerson Fisher 64 Series 1/2 in. FNPT Aluminum High-Pressure Regulator - 50 PSI, 5.25M BTU/HR

Emerson Fisher
1/2 in.
Product Type:
High Pressure
5,250,000 BTU/hr.
Outlet Pressure Setting:
Outlet Adjustment Range:
35 to 100 PSIG
3.00 LBS
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64 Series adjustable regulators usually reduce tank pressure to an intermediate pressure for use by another regulator. They may be used as high-pressure regulators on distribution systems when used in conjunction with first-stage downstream regulators. When equipped with an internal relief valve (64SR Series), the regulator may be used as a final-stage regulator on high-pressure systems. 64KB Series has a special PTFE diaphragm protector that makes it suitable for anhydrous ammonia NH3 service.

Notes: 64 Series regulators do not have an internal relief and should be installed with additional/eternal over pressure protection. These units should not be installed in fixed piping serving 14 in. w.c. 35 mbar appliance systems. Please consult with your LPG Equipment Distributor for more information. If the installation location makes the ignition of vented gas a possibility, then a vent line should be installed from the Type 64SR vent to a safe location.


  • Versatility
  • Body Side Connection
  • Easy Maintenance
  • UL Listed


  • Capacity (Propane): 5,250,000 BTU/HR (29.6 SCMH)
  • Inlet Connection: 1/2 in. FNPT
  • Outlet Connection: 1/2 in. FNPT
  • Material: Aluminum
  • Max Allowable Inlet Pressure: 250 psig (17.2 bar)
  • Max Emergency Outlet Pressure: 220 psig (15.2 bar)
  • Outlet Pressure Setting: 50 PSIG (.69 bar)
  • Outlet Adjustment Range: 35 to 100 PSIG (.21 to 1.0 bar)
  • Temperature Capabilities: -20° to 150°F (-29° to 66°C)


Warning: Failure to follow these instructions or to properly install and maintain this equipment could result in an explosion and/or fire causing property damage and personal injury or death. Fisher equipment must be installed, operated, and maintained in accordance with federal, state, and local codes and Emerson Process Management Regulator Technologies, Inc. instructions. The installation in most states must also comply with NFPA No 54 and 58 standards. Only personnel trained in the proper procedures, codes, standards, and regulations of the LP-Gas industry should install and service this equipment.


Product Manual (PDF Download)