Emerson Fisher Type 627-122 1 in. FNPT Ductile Iron High Pressure Regulator w/ 1/2 in. Port, 15 - 40 PSIG Spring, 14.837M BTU/HR

Emerson Fisher
1 in.
Ductile Iron
14,837,000 BTU/hr.
11.00 LBS
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Emerson Fisher 627 Direct-Operated Regulators are for low and high-pressure systems. These regulators can be used with natural gas, air or a variety of other gases. Used in Commercial and Industrial high-pressure applications like factories, office buildings, restaurants, etc. The Type 627 is normally used in conjunction with Type CS400 unit, however, they can also be used on Final-Stage (pounds-to-pounds) service.

Note: Fisher Type 627 regulators do not have an internal relief and should be installed with additional/external overpressure protection. These units should not be installed as part of a two-stage system in fixed piping serving 14 in. w.c. (35 mbar) appliance systems unless additional overpressure protection is installed that will make the system complaint with NFPA 58 requirements for a two-stage system.


  • Relief Operation Indicator
  • Easy to Maintain
  • Installation Adaptability
  • Application Versatility
  • Tamper-Resistant
  • Wide Range of Flow Capabilities


  • Series: 627-122
  • Material: Ductile Iron
  • Trim: Nitrile
  • Inlet x Outlet: 1 in. FNPT
  • Capacity: 14,837,000 BTU/hr
  • Port Size: 1/2 in.
  • Vent Size: 3/4 in. NPT screened
  • Outlet Pressure Range: 15 to 40 PSI (1 to 2.8 bar)
  • Maximum Operating Pressure: 300 PSI (20.7 bar)
  • Temperature Range: -20° to 180°F (-29° to 82°C)
  • Certifications: CRN


Warning: Failure to follow the 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™ regulators must be installed, operated and maintained in accordance with federal, state and local codes, rules and regulations, and Emerson Process Management Regulator Technologies, Inc. instructions. If the regulator vents gas or a leak develops in the system, service to the unit may be required. Failure to correct trouble could result in a hazardous condition. Call a gas service person to service the unit. Only a qualified person must install or service the regulator.


Instruction Manual (PDF Download)

627 Regulator Schematic (PDF Download)

627 Series Regulators Specifications (PDF Download)

PED Classification Guide (PDF Download)