重要な技術的利点
Reverse-Acting Mechanism: The ETR is distinguished by its internal architecture where the valve plug opens when the stem is pushed downward. This is a critical mechanical feature for achieving specific fail-safe positions (fail-open or fail-close) depending on the pneumatic actuator type and control signal logic used in the plant.
Balanced Plug for High Temperatures: Like the standard ET, the ETR uses a balanced plug to equalize process pressure. This design minimizes the actuator force required to modulate the valve, allowing for precise control of hot, high-pressure fluids with smaller, more efficient actuators.
Superior Shutoff Integrity: The ETR can provide up to Class V or VI shutoff. This is achieved through a specialized seal ring system—often spring-loaded—that maintains constant contact with the cage, combined with a seat design that protects a PTFE disk under controlled compression.
Rugged Cage-Guided Stability: The valve plug is fully supported by a heavy-duty cage. This robust guiding system ensures high stability and significantly reduces the vibration and mechanical noise associated with high-velocity flows, extending the service life of the trim.
Fugitive Emission Control: The ETR is fully compatible with ENVIRO-SEAL™ packing systems. These live-loaded PTFE or Graphite ULF systems provide an enhanced stem seal that prevents the loss of process fluid and reduces the need for frequent packing maintenance.
NACE and Global Compliance: Materials are available to meet NACE MR0175 / ISO 15156 and MR0103 standards for sour service. Additionally, the valve can be supplied with dimensions and ratings that satisfy EN/DIN industrial standards.
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） |
| アクション | 逆作動式（押し下げて開く） |
| プラグ設計 | バランス調整済み（アクチュエータ推力低下） |
| 最高温度 | Optimized for High-Temperature Service |
| 遮断クラス | クラスVまたはVIまで |
| ガイド | 高耐久性ケージガイド |
主な用途
High-Temperature Control Loops: Precise modulation of hot hydrocarbons, steam, or process gases requiring reverse-action logic.
Fail-Safe Critical Systems: Used in conjunction with specific actuators to ensure a safe plant state upon loss of power or air supply.
Power Generation Utilities: Managing high-pressure steam drains and vents where stability and tight shutoff are paramount.
Chemical and Refining: Reliable service in corrosive or sour environments where NACE-compliant metallurgy is required.
