Description
Woodward 08516-053
Technical Specifications
- Brand: Woodward
- Part Number: 08516-053
- Product Type: Linear Electro-Hydraulic Actuator
- Control Type: Closed-Loop Servo Control
Functional Features
- High Thrust: Generates significant force to overcome high line pressures and valve friction.
- Fail-Safe Operation: Typically features a spring-return mechanism to drive the valve to a safe position upon loss of hydraulic power.
- Precision Modulation: Allows for smooth, continuous valve positioning rather than simple open/close.
Application Scenarios
Deployed in steam turbine control valves, gas turbine fuel valves, and critical pressure relief systems.
Performance Parameters
- Stroke Length: Customized to match the specific valve travel requirements.
- Response Time: Fast dynamic response for emergency trip and load control.
Material Composition
Heavy-duty steel cylinder, precision-honed bore, high-performance piston seals, and corrosion-resistant rod coatings.
Structural Characteristics
Cylindrical body with integrated LVDT position feedback, hydraulic supply/return ports, and a mechanical output rod.
Working Principle
Hydraulic oil is directed into the cylinder by a servo valve based on electronic commands. The pressure differential moves the piston, and the LVDT continuously feeds the actual position back to the controller to maintain accuracy.
Installation Requirements
Align the actuator rod perfectly with the valve stem to prevent side-loading. Ensure hydraulic lines are properly flushed before connection.
Usage Precautions
Never exceed the rated hydraulic supply pressure. Bleed all air from the actuator and hydraulic lines before commissioning.
