Emerson Fisher 627M Direct-Operated Monitor 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.
Monitoring is overpressure control by containment. When the working pressure reducing valve ceases to control the pressure, a second regulator installed in series, which has been sensing the downstream pressure, goes into operation to maintain the downstream pressure at a slightly higher than normal pressure. When selecting regulators for use in a monitor system, the upstream regulator must have a control line. When determining the capacity of a monitor system you will get approximately 70% to 73% of the capacity of a single regulator when using the same regulator for both regulators in the system.
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.
- Used in Monitoring Applications
- Standard with Blocked Throat and External Sensing
- Relief Operation Indicator
- Easy to Maintain
- Installation Adaptability
- Application Versatility
- Wide Range of Flow Capabilities
- Series: 627M-474
- Material: Ductile Iron
- Trim: Nitrile
- Inlet x Outlet: 1 in. FNPT
- Capacity: 32,593,500 BTU/hr
- Port Size: 1/2 in.
- Vent Size: 3/4 in. NPT screened
- Outlet Pressure Range: 70 to 150 PSI (4.8 to 10.3 bar)
- Maximum Operating Pressure: 1000 PSI (69 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 Series Data Sheet (PDF Download)
627M Regulator Schematic (PDF Download)
PED Classification Guide (PDF Download)