Critical Technical Advantages
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High Capacity Design: Through advanced aerodynamic and hydrodynamic flow-stream contouring, the EHT achieves 30% to 40% higher capacity than conventional globe valves of similar size. This efficiency allows for optimized process control and potentially smaller valve footprint.
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Balanced Plug for Stable Control: The EHT features a balanced plug architecture that equalizes process pressure across the trim. This significantly reduces the actuator thrust required to move the valve, allowing for 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 internal components from the mechanical stresses inherent in high-velocity steam or liquid service.
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High-Temperature Shutoff: For extreme thermal environments, the EHT can be equipped with metal C-seals or Bore Seals. These specialized seals permit Class V shutoff at temperatures up to 593°C (1100°F), ensuring reliable isolation in high-temperature headers and bypass lines.
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Intermediate Pressure Ratings: With buttwelding end connections and non-destructive testing, the EHT 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 for all applications. This high wear resistance, combined with the stability provided by the cage guiding, ensures a long service life and reduces maintenance frequency 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 Guided |
| Pressure Class | Up to CL2500 and Intermediate Special Ratings |
| Max Temperature | Up to 593°C (1100°F) with metal seals |
| Shutoff Class | Up to Class V or VI |
Primary Applications
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Main Steam and Feedwater: Controlling high-pressure steam distribution and feedwater regulation in utility power plants.
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High-Pressure Liquid Letdown: Reducing pressure in hydrocarbon liquid streams within refineries and petrochemical units.
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Severe Service Throttling: Reliable modulation in any application where high pressure drops would cause vibration or erosion in less robust valves.
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Boiler Support Systems: Handling auxiliary steam and bypass lines where high capacity and precision are required.
