Key Benefits and Advantages
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Absolutely No Atmospheric Bleed: Utilizing a sophisticated pilot-operated control system, these units bleed 100% of the gas into the downstream system. This eliminates the environmental impact and cost associated with nuisance gas venting.
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Flexible Failure Mode Options: The Type EZHSO (Spring-to-Open) is designed to maximize system uptime, while the Type EZH (Spring-to-Close) is used to protect downstream assets. Many operators combine both—using an EZHSO worker and an EZH monitor—to achieve the ultimate balance of reliability and safety.
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Severe Service Longevity: The metal plug is designed to deflect particles and debris away from the soft seat. This innovative geometry provides excellent resistance to particle erosion, significantly prolonging the service life in “dirty” gas environments.
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Bubble-Tight Shutoff: A knife-edged metal plug paired with a high-quality soft seat ensures a positive, bubble-tight seal. This is essential for dead-end systems where pressure creep cannot be tolerated.
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Quiet Operation with Whisper Trim: When equipped with the optional Whisper Trim Cage, noise levels can be reduced by up to 8 dBa at the source. This often eliminates the need for expensive secondary treatments like sound insulation or buried enclosures.
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Full Pressure Rating: Both the inlet and outlet are rated for 1500 psig (103 bar). This equal rating simplifies the selection process and removes the need for specialized, complex startup or shutdown procedures.
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Hydrogen Ready: The EZH Series has undergone extensive evaluation for material compatibility and susceptibility to hydrogen embrittlement. Configurations are available that are fully optimized for hydrogen applications.
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Precise Control: Regardless of inlet pressure fluctuations or rapid load changes, the EZH Series provides stable and accurate downstream pressure control.
Technical Properties
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Body Sizes: Available in multiple sizes suited for high-volume transmission lines, including NPS 1, 2, 3, 4, and 6.
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Pressure Rating: Maximum inlet and outlet pressure of 1500 psig (103 bar).
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Temperature Capabilities: Designed to operate across a broad range of standard and low-temperature gas conditions.
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Pilot Compatibility: Works with high-accuracy pilots to ensure a narrow proportional band and high sensitivity to pressure changes.
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Travel Indicator: Includes a visual indicator to allow for easy in-service monitoring of valve position.
Field of Application
The EZH Series is the preferred choice for high-pressure gas reduction where large volumes and high-integrity shutoff are required. Its robust nature makes it the primary regulator for the “first stage” of gas utility distribution.
Primary Industries and Uses:
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Natural Gas Transmission: High-pressure reduction at town border and city gate stations.
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Power Generation: Delivering massive volumes of fuel gas at precise pressures for power plant turbines.
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Large Capacity Distribution: Serving as the main regulator for industrial parks and large-scale municipal grids.
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Hydrogen Infrastructure: Managing the transportation and blending of hydrogen in high-pressure networks.
