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The WOODWARD 8200-508 is a Digital Valve Positioner (DVP). This electronic device is a key component in precision control systems for industrial turbines, including gas, steam, and even some hydro turbines. It’s designed to accurately and dynamically control the position of various valves and actuators.
WOODWARD 8200-508: Digital Valve Positioner (DVP)
The WOODWARD 8200-508 DVP serves as an intelligent interface between a turbine’s main control system and its actuation hardware (like fuel valves or steam valves). It translates command signals into precise physical movements, enabling highly accurate control over critical parameters to optimize turbine performance, efficiency, and safety.
Product Overview
This particular part number represents a specific configuration within Woodward’s advanced DVP series, known for its robust performance and adaptability in diverse industrial environments.
- Product Type: Digital Valve Positioner (DVP) / Electric Actuator Driver
- Manufacturer: Woodward
- Part Number: 8200-508
- Key Specifications (based on common configurations for this P/N):
- Input Power: 24 VDC (typically in the range of 18–36 VDC).
- Ingress Protection (IP) Rating: IP56. This is a significant feature, indicating robust protection against dust ingress and powerful jets of water. This makes it suitable for more exposed industrial environments where moisture or dust might be present, unlike lower IP-rated models that require strict enclosure protection.
- Communication: Capable of Ethernet communication (specifically EGD – Ethernet Global Data), allowing for advanced connectivity to plant Distributed Control Systems (DCS), service tools, and remote operator panels. This is a distinguishing feature compared to DVPs with only analog or CANopen communication.
- Input/Output Connections: While specific details vary, it often features terminal block (TB) inputs and can have various output connections. Some sources indicate “IP30, TB Input/Output” for a classic DVP with this P/N, while others specifically mention “IP56, ETHERNET.” It’s crucial to verify the exact configuration with Woodward documentation or the supplier.
- Function: The 8200-508 DVP receives a demand signal from a turbine controller (e.g., a Woodward MicroNet or 505 controller). It then uses this signal, along with high-resolution position feedback from the valve or actuator (typically via a resolver), to precisely drive the valve to the commanded position. It contains a robust internal controller that employs advanced algorithms (e.g., PID, OptiTune adaptive PID) to ensure high-speed, precise, and stable valve control, crucial for maintaining turbine stability and performance during all operating conditions.
Detailed Product Description
The Woodward 8200-508 Digital Valve Positioner is a state-of-the-art driver for Woodward’s electric actuation systems. Its design emphasizes accuracy, responsiveness, and reliability, making it ideal for modern turbine control applications.
- High-Speed, Precise Control: The DVP utilizes advanced control algorithms and high-speed processing to accurately and rapidly position valves and actuators. This dynamic response is crucial for stable turbine operation, especially during transients like load changes, startup, and shutdown.
- Integrated Control Architecture: It leverages Woodward’s latest control architecture, offering robust control for various motor types, including Limited Angle Torque (LAT) and Brushless DC (BLDC) motors found in Woodward’s high-performance valves and actuators.
- Resolver Feedback for Accuracy: The DVP relies on resolver feedback from the valve or actuator to determine its exact position, creating a highly accurate closed-loop control system that ensures high repeatability and minimal overshoot.
- ID Module Compatibility: Many newer Woodward valves and actuators come with an integrated “ID module.” When connected to such a device, the 8200-508 DVP can automatically read critical valve-specific configuration information, enabling a “plug-and-play” installation and simplifying setup and commissioning.
- Robust IP56 Enclosure with Ethernet: The IP56 rating makes this DVP significantly more resilient to environmental factors (dust and powerful water jets), expanding its installation flexibility. The integrated Ethernet (EGD) communication capability provides a high-speed, modern interface for seamless integration into plant-wide control networks, facilitating remote diagnostics, monitoring, and control.
- Flexible Interface: The DVP supports multiple input types, making it compatible with a wide range of turbine controllers.
Technical Specifications (for the 8200-508 DVP)
| Parameter | Value |
| Product Type | Digital Valve Positioner (DVP) / Actuator Driver |
| Manufacturer | Woodward |
| Part Number | 8200-508 |
| Input Power | 24 VDC (typical range 18–36 VDC) |
| Ingress Protection (IP) | IP56 (Dust-tight, protected against strong jets of water) |
| Communication Protocols | Ethernet (EGD), typically supports Analog, PWM, CANopen |
| Feedback Type | Resolver (from valve/actuator) |
| Compatible Actuators | Woodward Limited Angle Torque (LAT) and Brushless DC (BLDC) motor types |
| Key Features | ID Module Compatibility for plug-and-play, Advanced PID control, High-speed data logging, Diagnostic capabilities |
| Ambient Operating Temp. | –40 to +70 °C (–40 to +158 °F) (may be reduced slightly with Ethernet module) |
| Applications | Valve and motor control for industrial gas, steam, and hydro turbines; process control |
| Documentation References | Woodward Product Specification: 03376, various DVP manuals |
Typical Applications
The WOODWARD 8200-508 Digital Valve Positioner is a core component in:
- Gas Turbine Fuel Control Systems: Precisely positioning gas fuel metering valves to control combustion processes.
- Steam Turbine Valve Actuation: Driving steam admission, extraction, or bypass valves for speed, load, and pressure control, especially in environments where a higher IP rating is beneficial due to potential moisture or dust.
- Hydro Turbine Gate/Wicket Control: For precise positioning of gates or wicket gates in hydro power applications.
- Compressor and Pump Control: Utilized in systems where highly accurate and dynamic positioning of control valves is necessary to regulate flow, pressure, or other process variables in industrial machinery.
