Woodward 8200-182 Analog Turbine Actuator Driver Module

Product Overview

The 8200-182 is an analog actuator-drive module developed by Woodward for closed-loop turbine valve control systems. It functions as an interface between low-level analog control signals and high-force hydraulic or electro-hydraulic actuators, enabling accurate and repeatable valve positioning in turbine applications.

Designed for continuous industrial duty, this module converts standard current commands into proportional actuator motion while supervising position feedback and operating status. Its stable analog architecture, fast dynamic response, and robust electrical design make it suitable for long-term operation in power-generation and mechanical-drive environments.

Control Function and Operating Principle

The 8200-182 processes a 4–20 mA input signal from a turbine governor or supervisory controller and produces a corresponding actuator-drive output. Integrated feedback handling ensures the commanded valve position is accurately achieved and maintained across the full stroke range.

Key functional characteristics include:

• Linear conversion of analog command signals into actuator movement
• Continuous valve-position regulation with full-stroke capability
• Feedback supervision for stable and repeatable control behavior
• Fault detection for actuator or signal abnormalities
• Compatibility with hydraulic and electro-hydraulic valve systems

Electrical Specifications

• Input signal range: 4–20 mA (industry standard current loop)
• Output interface: Hydraulic or electro-hydraulic actuator drive
• Supply voltage: 24 VDC nominal
• Operating voltage range: 18–32 VDC
• Dynamic response: < 50 ms typical under nominal load
• Signal isolation: Designed to withstand industrial electrical noise

Environmental and Mechanical Characteristics

• Operating temperature range: –20 °C to +70 °C
• Enclosure rating: IP20 (cabinet installation required)
• Vibration resistance: Suitable for turbine skid environments
• Mounting method: Panel or chassis installation
• Dimensions: 200 × 150 × 75 mm
• Weight: 0.8 kg

Diagnostics and Compliance

• Continuous actuator feedback monitoring
• Internal fault indication for control and feedback loops
• Designed for fail-safe turbine control architectures
• Industrial compliance: CE and UL certified (system-dependent installation)

Typical Application Areas

• Steam turbine admission and control valve positioning
• Gas turbine fuel or variable-geometry valve actuation
• Hydro turbine guide vane or flow-control actuation
• Mechanical-drive turbines for compressors and pumps
• Power plants and combined heat and power systems

​FAQ

What type of control signal does the 8200-182 accept? The module is designed for standard 4–20 mA analog control signals commonly used in turbine governors and DCS systems.

Is the module suitable for harsh industrial environments? Yes. The electrical design and operating temperature range make it suitable for turbine skids, power plants, and oil & gas installations when installed in a protected cabinet.

Can it be used with both hydraulic and electro-hydraulic actuators? Yes. The 8200-182 supports both actuator types, provided system pressure and actuator specifications meet the application requirements.