Emerson Fisher 627R 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 627R regulator has Token Relief, which means the regulator self-relieves a portion of downstream pressure that builds above the regulator Set-Point. But it is not sufficient, nor can it relieve the entire flow capacity of the regulator, and will likely require additional over-pressure protection devices.
For the Type 627R, regulator, the internal relief across the diaphragm provides overpressure protection in many applications. As outlet pressures build up above the start-to-discharge point, the diaphragm moves off the relief valve seat allowing the excess pressure to bleed out through the screened vent. For extra protection, should failure conditions exist which would prevent normal operation of the regulator (for example, disk broken off or disk erosion), the pusher post contacts the lever retainer causing the relief valve assembly to open. Since the diaphragm continues to rise as downstream pressure builds, it opens the relief valve; thereby, opening the valve. This internal relief may be not adequate for the application.
Note: Fisher Type 627R regulators 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.
Features
- High-Pressure Capabilities
- Rugged Construction
- Better Low-Pressure Control
- Sour Gas Service Capability
Specifications
- Series: 630-104-78 - Token Relief
- Material: Cast Iron
- Trim: Nitrile
- Inlet x Outlet: 2 in. FNPT
- Capacity: 14,000,000 BTU/hr
- Port Size: 1/2 in.
- Vent Size: 1/4 in. NPT screened
- Outlet Pressure Range: 8 to 20 PSI (.55 to 1.4 bar)
- Setpoint: 10 PSI (.69 bar)
- Maximum Operating Pressure: 250 PSI (17.2 bar)
- Temperature Range: -20° to 180°F (-29° to 82°C)
- Certifications: CRN
Warning
Warning: Personal injury, property damage, equipment damage or leakage due to escaping gas or bursting of pressure containing parts may result if this regulator is overpressured or is installed where service conditions could exceed the limits given in Specifications section (Instructions Manual), Tables 1 through 3 or where conditions exceed any ratings of the adjacent piping or piping connections. To avoid such injury or damage, provide pressure-relieving or pressure-limiting devices (as required by the appropriate code, regulation or standard) to prevent service conditions from exceeding those limits. Additionally, physical damage to the regulator could cause personal injury or property damage due to escaping gas. To avoid such injury or damage, install the regulator in a safe location.
Downloads
Instruction Manual (PDF Download)
Type 630 Regulator Data Sheet (PDF Download)
Type 630 Regulator Schematic (PDF Download)
PED Classification Guide (PDF Download)
