重要な技術的利点
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High-Capacity Flow Design: Through the application of aerodynamic and hydrodynamic design principles, the EHAT achieves 30% to 40% higher capacity than conventional valves of comparable size. This allows for smaller valve bodies to handle high-volume high-pressure flows.
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Balanced Plug Stability: The balanced plug architecture equalizes process pressure across the trim. This drastically reduces the actuator thrust required to modulate the valve, allowing for smoother, high-precision control even at extreme pressure differentials.
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Rugged Drilled-Hole Cage Guiding: Standard drilled-hole cages provide superior mechanical strength and resistance to vibration. The plug is continuously supported throughout its stroke, protecting the valve from the mechanical stresses inherent in severe service.
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High-Temperature Shutoff: For thermal extremes, the EHAT 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 performance in high-temperature steam and hydrocarbon isolation.
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Intermediate Pressure Ratings: With buttwelding end connections and non-destructive testing, the EHAT can conform to ASME Intermediate Special Ratings. This allows for safe operation at pressure/temperature levels that exceed standard Class 2500 ratings.
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Precise Low-Flow Control: For applications requiring modulation of very low flow rates, the EHAT is available with Micro-Form or Micro-Flute valve plugs, providing excellent rangeability and protecting against “wiredrawing” erosion at small openings.
技術性能マトリックス
| 特徴 | 詳細 |
| バルブスタイル | アングルボディ（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 | 頑丈なドリル穴ケージガイド |
| 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 |
| 遮断クラス | クラスVまたはVIまで |
主な用途
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Main Steam and Turbine Bypass: Managing high-pressure, high-temperature steam in utility power plants.
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Severe Service Hydrocarbon: Precise pressure regulation in high-pressure refining and production units.
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Boiler Feedwater: Stable modulation of high-pressure liquid where vibration and cavitation resistance are essential.
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Emergency Vents and Drains: High-capacity relief and isolation in critical high-pressure utility systems.
