Key Benefits and Advantages
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Precision for Fixed-Factor Billing: The 627F is designed to meet the strict requirements of pressure factor measurement. Its pilot-operated design eliminates the “droop” typically found in spring-loaded regulators, ensuring the downstream pressure remains at the exact setpoint required for accurate billing.
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External Registration Accuracy: This regulator uses external registration, meaning it senses pressure directly from the downstream piping via a control line. This bypasses any turbulence at the valve outlet, providing a much more accurate pressure signal to the pilot.
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Wide Range of Flow Capabilities: Despite its focus on precision, the 627F does not sacrifice capacity. It can handle a wide spectrum of flow rates, making it suitable for varying loads in commercial and industrial settings.
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Easy to Maintain: The 627F features a modular design that allows for the inspection and replacement of the orifice and valve disk without removing the entire body from the line. The pilot is also easily accessible for adjustment or service.
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Installation Adaptability: The regulator can be installed in various orientations, and the actuator can be rotated to accommodate tight piping configurations or specific site requirements.
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Tamper-Resistant Design: To protect the integrity of billing systems, the 627F includes a cap over the pilot adjustment screw. This discourages unauthorized changes to the setpoint, ensuring the system remains within its calibrated parameters.
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Tight Shutoff Capability: Utilizing high-performance soft-seat materials, the 627F provides a bubble-tight seal during zero-flow conditions. This prevents pressure buildup in the downstream system, which is critical for both safety and measurement accuracy.
Technical Properties
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Operation: Pilot-operated (using Type 6351F pilot).
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Pressure Sensing: External registration (requires a downstream control line).
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Application: Pressure Factor Measurement (PFM) and fixed-factor billing.
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Body Sizes: Available in 3/4, 1, and 2-inch NPT or flanged connections.
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Maximum Inlet Pressure: Designed to handle common distribution pressures while maintaining a high safety margin.
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Media: Natural gas, propane, air, and other non-corrosive gases.
Field of Application
The Type 627F is the standard for gas utilities and industrial energy managers who require laboratory-grade accuracy in field conditions.
Primary Industries and Uses:
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Commercial Meter Sets: Ensuring accurate billing for hospitals, shopping malls, and large apartment complexes.
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Industrial Gas Distribution: Managing fuel gas for high-precision manufacturing processes where pressure stability affects product quality.
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City Gate Stations: Serving as a secondary regulator in municipal grids where fixed-factor measurement is utilized.
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PFM Stations: Specifically used in any application where the gas contract relies on Pressure Factor Measurement rather than electronic compensation.
