Electric Single-seat Control Valve

2025-06-27

The electric single-seat control valve is a pivotal device in modern industrial process control, renowned for its precision, reliability, and automation capabilities. Driven by an electric actuator, it precisely regulates fluid flow, pressure, and temperature by positioning a single valve plug within the valve body.

Design and Working Principle: The valve features a streamlined body with a single-seat and plug assembly. The electric actuator, powered by an electrical signal (usually 4-20mA or 0-10V), drives the valve stem to move the plug up or down, adjusting the flow area. When fully closed, the plug tightly seats against the valve seat, achieving excellent shut-off performance, often meeting ANSI/FCI 70-2 Class IV or even Class VI leakage standards. The actuator's integrated control module enables real-time feedback and adjustment, ensuring accurate process parameter control.

Key Advantages:

High Precision: Offers precise flow regulation with a wide flow coefficient (Cv) range, making it ideal for applications requiring strict control, such as chemical dosing, heat exchanger flow management, and pharmaceutical fluid handling.
Low Leakage: The single-seat design ensures tight sealing, minimizing leakage, which is crucial for handling hazardous, expensive, or environmentally sensitive media.
Automation-friendly: Easily integrates with industrial automation systems, allowing remote operation, programming, and monitoring, thus enhancing process efficiency and reducing manual intervention.

Applications: Widely used across industries, including petrochemicals, power generation, food and beverage, and water treatment. In petrochemical plants, it controls the flow of corrosive chemicals and high-temperature fluids; in power plants, it regulates steam flow in turbines; and in water treatment facilities, it manages the dosage of treatment chemicals.

In summary, the electric single-seat control valve's combination of accurate control, reliable sealing, and automation compatibility makes it an indispensable component for optimizing industrial processes and ensuring operational safety.

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