WOODWARD 8200-187

الوصف

The WOODWARD 8200-187 is a Digital Valve Positioner (DVP). This highly advanced electronic device is integral to modern industrial turbine control systems, providing extremely precise and dynamic control over the position of various valves and actuators.

WOODWARD 8200-187: Digital Valve Positioner (DVP)

The WOODWARD 8200-187 DVP serves as an intelligent bridge between a turbine’s main control system and the mechanical components that regulate critical flows like fuel or steam. It accurately translates electrical command signals into precise physical movements of the valve or actuator, which is essential for optimizing turbine performance, efficiency, and safety.

Product Overview

This particular part number represents a specific and robust configuration within Woodward’s DVP series. It’s designed for challenging industrial environments where superior ingress protection and reliable connections are crucial.

• Product Type: Digital Valve Positioner (DVP) / Electric Actuator Driver
• Manufacturer: Woodward
• Part Number: 8200-187
• Key Specifications:
  • Input Power: 125 VDC. This is a significant characteristic, making it suitable for industrial control systems that standardize on a 125 VDC power supply.
  • Ingress Protection (IP) Rating: IP66. This is a key differentiator. It signifies high protection against dust ingress and powerful jets of water, allowing for installation in more exposed or harsh industrial environments where moisture or dust might be present (e.g., directly on a turbine deck or in areas subject to washdowns).
  • Input/Output Connections: Features Conduit Input/Output. This robust connection method involves wires routed through protective conduits, offering enhanced physical protection against environmental factors and mechanical damage.
  • Communication: As part of the DVP series, it supports various communication protocols, including analog inputs, PWM, and often CANopen. While not explicitly stated for this exact P/N in all classic DVP breakdowns, the DVP platform can also support Ethernet (EGD) on other variants, offering advanced network integration capabilities.
• Function: The 8200-187 DVP receives a demand signal from a turbine controller (such as a Woodward MicroNet or 505 controller). It then processes this signal, along with high-resolution position feedback from the connected valve or actuator (typically via a resolver), to precisely drive the valve to the commanded position. Its internal controller uses advanced algorithms (like PID and adaptive OptiTune) to provide fast, accurate, and stable valve control, critical for maintaining turbine stability and performance during all operating conditions, including startup, load changes, and shutdown.

Detailed Product Description

The Woodward 8200-187 Digital Valve Positioner is a state-of-the-art driver for Woodward’s electric actuation systems. Its design prioritizes accuracy, responsiveness, and reliability for critical turbine control applications in demanding environments.

• High-Speed, Precise Control: The DVP leverages 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 and rapid start/stop sequences.
• Integrated Control Architecture: It incorporates Woodward’s latest control architecture, providing robust and efficient control for their various electric motor-driven valves and actuators, including Limited Angle Torque (LAT) and Brushless DC (BLDC) motor types.
• Resolver Feedback for Enhanced Accuracy: By using resolver feedback from the connected valve or actuator, the DVP establishes a highly accurate closed-loop control system, ensuring precise positioning, high repeatability, and minimal overshoot.
• ID Module Compatibility for Plug-and-Play: Many newer Woodward valves and actuators are equipped with an “ID module.” When connected to the 8200-187 DVP, it can automatically read critical, valve-specific configuration information, enabling “plug-and-play” installation and simplifying setup and commissioning significantly.
• Rugged IP66 Enclosure with Conduit Connections: The IP66 rating is a key advantage, making this DVP exceptionally resilient to environmental factors (dust and powerful water jets). This expands its installation flexibility, allowing it to be placed directly in harsher environments without needing an additional protective enclosure. The conduit input/output further enhances the protection of the wiring, ensuring long-term reliability in challenging conditions.
• 125 VDC Power Input: This particular model is designed to operate seamlessly with a 125 VDC power supply, a common standard in many industrial control systems and existing plant infrastructures.

Technical Specifications (for the 8200-187 DVP)

Typical Applications

The WOODWARD 8200-187 Digital Valve Positioner is a core component in:

• Gas Turbine Fuel Control Systems: Precisely positioning gas fuel metering valves to control combustion processes, especially in outdoor or harsh environments.
• Steam Turbine Valve Actuation: Driving steam admission, extraction, or bypass valves for speed, load, and pressure control, where its IP66 rating makes it suitable for turbine decks with potential moisture exposure.
• Other Industrial Process Control: Any application requiring high-accuracy, dynamic positioning of valves or motors based on electronic demand signals, particularly where a 125 VDC power supply and robust environmental protection are required.