Industrial valve electro-hydraulic actuators combine hydraulic power with electrical control to automate the operation of valves in industrial processes. Here’s an overview:

1. Functionality: Electro-hydraulic actuators use an electric motor to drive a hydraulic pump, which generates hydraulic pressure to operate the valve’s movement. They provide the necessary force or torque to open, close, or modulate the position of the valve’s closure element (such as a disc, ball, or plug). They are controlled remotely using electrical signals, offering precise positioning and automation capabilities.

2. Design: Electro-hydraulic actuators typically consist of an electric motor, hydraulic pump, hydraulic cylinder or rotary actuator, control valves, and associated hydraulic and electrical components. They integrate both hydraulic and electrical systems to provide efficient and reliable operation.

3. Features:

   • Hydraulic Power: Electro-hydraulic actuators utilize hydraulic power to provide high force or torque output, making them suitable for applications requiring heavy-duty operation.
   • Electrical Control: Electrical control allows for precise positioning and automation of the actuator, enabling remote operation and integration with control systems.
   • Position Feedback: Many electro-hydraulic actuators include position feedback mechanisms, such as linear transducers or rotary encoders, to provide feedback on the valve’s position.
   • Control Options: Electro-hydraulic actuators can be controlled using various control options, including on/off control, modulating control, proportional control, or digital communication protocols such as 4-20 mA or HART.
   • Safety Features: Some electro-hydraulic actuators include safety features such as fail-safe operation or emergency shutdown capabilities to ensure safe operation in critical situations.

4. Applications: Electro-hydraulic actuators are used in a wide range of industries and applications, including oil and gas, petrochemical, chemical processing, water and wastewater treatment, power generation, and more. They are essential for controlling the flow of fluids in pipelines, tanks, and other process equipment.

5. Advantages:

   • Combines the advantages of hydraulic power with electrical control
   • Provides high force or torque output for heavy-duty applications
   • Offers precise positioning and automation capabilities
   • Suitable for integration with control systems and remote operation
   • Durable and reliable in harsh environments

6. Maintenance: Proper maintenance of electro-hydraulic actuators is essential to ensure their continued reliability and performance. Maintenance tasks may include lubrication, inspection of hydraulic and electrical components, calibration, and repair or replacement of worn or damaged parts.

Industrial valve electro-hydraulic actuators offer efficient and reliable operation in various industrial applications, improving productivity and safety. Proper selection, installation, and maintenance of electro-hydraulic actuators are essential to ensure optimal performance and longevity.