重要な技術的利点
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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.
技術性能マトリックス
| 特徴 | 詳細 |
| バルブスタイル | グローブ（シングルポート） |
| プラグアクション | バランス型（押し下げて閉じる） |
| ガイド | Heavy-Duty Drilled-Hole Cage |
| 圧力クラス | CL2500まで、および中間特別定格 |
| 最高温度 | 金属シール使用時、最高593℃（1100°F）まで対応 |
| メンテナンス | Quick Change Trim (Top-entry) |
主な用途
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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.
