Critical Technical Advantages
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High-Capacity Flow Stream: Utilizing advanced aerodynamic and hydrodynamic design, the EHD-1 provides 30% to 40% higher capacity than conventional globe valves of similar size. This allows for more efficient process control and potentially smaller valve selections for high-flow applications.
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Balanced Plug for Stable Control: The EHD-1 features a balanced plug design that equalizes process pressure across the trim. This drastically reduces the actuator thrust required to move the valve, enabling smooth, high-precision modulation even at extreme pressure differentials without needing massive actuators.
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Rugged Drilled-Hole Cage Guiding: Standard drilled-hole cages provide superior mechanical strength and resistance to vibration. This heavy-duty guiding system supports the plug throughout its entire stroke, protecting the valve from the mechanical stresses inherent in high-velocity steam or liquid service.
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High-Temperature Shutoff: For applications with extreme heat, the EHD-1 can be equipped with metal C-seals or Bore Seals. These permit Class V shutoff at temperatures up to 593°C (1100°F), ensuring reliable isolation in critical high-temperature headers.
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Intermediate Pressure Ratings: With buttwelding end connections and non-destructive testing, the EHD-1 can conform to ASME Intermediate Special Ratings. This allows the valve to operate safely at pressure and temperature levels that exceed standard Class 2500 ratings.
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Long Trim Life: Hardened materials for the cage, plug, and seat are standard. This wear resistance, combined with the stability of the cage guiding, ensures a long service life and reduces the frequency of maintenance in erosive environments.
Technical Performance Matrix
| Feature | Details |
| Valve Style | Globe (Single Port) |
| Plug Action | Balanced (Push-down-to-close) |
| Guiding | Heavy-Duty Drilled-Hole Cage |
| Pressure Class | Up to CL2500 and Intermediate Special Ratings |
| Max Temperature | Up to 593°C (1100°F) with metal seals |
| Maintenance | Quick Change Trim (Top-entry) |
Primary Applications
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Main Steam and Feedwater: Controlling high-pressure steam distribution and feedwater regulation in modern utility power plants.
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Severe Service Throttling: Reliable modulation in any application where high pressure drops would cause vibration or erosion in standard valves.
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High-Pressure Gas Letdown: Managing gas pressure regulation in refineries and petrochemical processing units.
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Boiler Support Systems: Handling auxiliary steam and bypass lines where high capacity and precision are required.
