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Woodward 9908-263

  • Product Name:​ GS16 Gas Fuel Metering Valve (model 9908-263)
  • Product Introduction:​ The 9908-263 is a GS16-series electrically driven gas control valve designed for industrial and aeroderivative gas turbines. It provides a reliable, cost-effective interface between electronic control systems and gas turbines for precise fuel metering.
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Detailed content

  • Technical Specifications:​
    • Valve Type: Self-cleaning, shear-type metering gas valve
    • Gas Flow Control Range: 22 to 13,608 kg/h (50 to 30,000 lb/h)
    • Gas Supply Pressure: 345 to 5,171 kPa (50 to 750 psig)
    • Minimum Pressure Differential: 138 kPa (20 psid) recommended for specified flow accuracy
    • Gas Temperature: –40 to +93°C (–40 to +200°F)
    • Ambient Temperature: –40 to +93°C (–40 to +200°F)
    • Metering Ports: 645 mm², 968 mm², or 1,290 mm² (1.00, 1.50, or 2.00 in²)
    • Heat Soak Rating: 125°C for 6 hours, unpowered
    • Control Signal: DeviceNet / CANopen
    • Position Feedback: 4–20 mA, DeviceNet, or CANopen
    • Metering Valve Leakage: <0.1% of rated flow at 50 psig inlet, 0 psig discharge
    • Slew Rate: <100 ms
    • Position Loop Bandwidth: 40 rad/s at –6 dB at 24 Vdc
    • Gas Connection: 2.00-inch (50.8 mm) RF flanges per ANSI B16.5 Class 600
    • Flange-to-Flange Dimension: 8.50 inches (215.9 mm) nominal
    • Materials: Stainless steel housing and internal gas-contact parts; NACE MR0175-2000 compliant
    • Weight: 48 kg (105 lb)
    • Power Supply: 18–32 VDC
    • Electrical Interface: Dual conduit entries
  • Functional Features:​ Self-cleaning shear-type action prevents port contamination; high-torque electric actuator with onboard driver; single moving part (rotor with metering element and dual resolvers on a single shaft); closed-loop position control; discrete fault output; independent shutdown capability.
  • Working Principle:​ The onboard electronic controller receives a position command via DeviceNet/CANopen (or 4–20 mA), drives the electric actuator to rotate the shear-type metering element, and maintains precise gas flow via resolver feedback. Dual resolvers provide redundancy.
  • Application Scenarios:​ Gas fuel metering for industrial gas turbines (10–50 MW) in power generation, gas compression, and mechanical drive; suitable for base turbines and Dry Low Emission multi-valve configurations.
  • Structural Characteristics:​ Stainless steel body; dual conduit entries; 2-inch ANSI RF flanges; integrated onboard driver electronics; dual resolvers for position feedback.
  • Installation Requirements:​ Mount to turbine gas manifold using 2-inch ANSI B16.5 Class 600 RF flanges; connect 18–32 VDC power; wire DeviceNet/CANopen network; install gas filtration of 25 µm absolute; maintain minimum 20 psid differential for specified accuracy.
  • Usage Notes:​ Do not exceed 750 psig supply pressure; the self-cleaning design tolerates contaminated fuels; verify communication protocol matches the control system; for 9908-263 specifically, confirm the exact port size and driver configuration with Woodward documentation.

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