Key Benefits and Advantages
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Precise Pressure Control: The pilot-operated design ensures the regulator remains sensitive to even the smallest changes in downstream demand, maintaining a flat pressure curve.
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Low Differential Performance: Specifically engineered for systems with limited pressure drops, these units can accurately control flow at differentials as low as 1 psid (70 mbar d).
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Zero Atmospheric Bleed: By utilizing a pilot system that bleeds 100% of the loading gas back into the downstream piping, this regulator eliminates wasteful emissions and nuisance odors.
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High Turndown Capability: The combination of an oversized diaphragm and a linear cage design allows the regulator to manage extreme variations in flow demand without losing stability.
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Quiet Operation: Available with Whisper Trim Cage technology, which can reduce aerodynamic noise by up to 30 dBa in high-velocity gas applications.
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Bubble-Tight Shutoff: Features a knife-edged metal plug paired with a soft seat, ensuring a positive seal in dead-end systems and preventing downstream overpressure during idle periods.
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Simplified Maintenance: The top-entry design allows for in-line inspection and part replacement. Trim components can be accessed without removing the valve body from the pipeline.
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Visual Troubleshooting: An integrated travel indicator provides a quick visual reference for the valve plug position, simplifying in-service diagnostics.
Technical Properties
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Type 1098-EGR: Standard version for low to medium pressure applications.
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Type 1098H-EGR: High-pressure version for more demanding upstream conditions.
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Body Sizes: Available in a wide range of sizes to accommodate large-scale industrial flows.
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End Connections: Offered in flanged, threaded, or weld-end configurations to meet specific piping standards.
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Versatile Loading Pilots: Can be paired with various Fisher pilots (such as the 61 series) to achieve different sensitivity levels and pressure ranges.
Field of Application
The 1098-EGR series is the preferred choice for commercial and industrial gas regulation where high capacity and precision are required. Its ability to handle liquid service makes it equally valuable in plant water and utility systems.
Primary Industries and Uses:
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Natural Gas Distribution: District regulating stations and city gate installations.
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Industrial Energy: Fuel gas supply for large boilers, furnaces, ovens, and mixers.
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Commercial Facilities: Centralized heating and gas management for shopping centers, schools, and hospitals.
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Plant Utilities: Compressed air service and high-volume liquid distribution.
