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Woodward 9908-266
Product Overview: The 9908-266 is a member of the Woodward GS16 series of electronically driven gas control valves. It provides a reliable, cost-effective interface between electronic control systems and gas turbines used in electrical power generation, compressor, or mechanical drive applications, suitable for industrial gas turbine engines with maximum power ratings between 10 and 50 MW. The valve assembly can be used for base turbines or in multiple valve configurations in Dry Low Emission (DLE) turbines.
Detailed content
Technical Specifications:
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Nominal gas flow control range: 22 to 13,608 kg/h (50 to 30,000 lb/h)
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Gas supply pressure: 345 to 5,171 kPa (50 to 750 psig)
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Gas temperature: –40 to +93 °C (–40 to +200 °F)
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Minimum pressure differential: 138 kPa (20 psid) recommended for specified flow control accuracy
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Gas filtration recommendation: 25 µm absolute
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Metering ports (maximum area): 645 mm², 968 mm², and 1,290 mm² (1.00 in², 1.50 in², and 2.00 in²)
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Digital input: DeviceNet™ / CANopen
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Metering valve leakage: < 0.1% of rated flow maximum at 50 psig (345 kPa) inlet pressure, 0 psig discharge
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Slew rate: < 100 ms
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Position loop bandwidth: 40 rad/s at –6 dB at 24 Vdc
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Gas connection: 2.00 inch (50.8 mm) RF flanges per ANSI B16.5 Class 600
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Flange-to-flange dimension: 8.50 inches (215.9 mm) nominal
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Heat soak rating: 125 °C for 6 hours, unpowered
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Weight: 48 kg (105 lb)
Functional Features:
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Self-cleaning shear-type metering action prevents control port contamination
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Integrated onboard electronic driver module
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High-torque actuator combined with the metering valve
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Precise fuel flow metering capability
Material Composition:
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Stainless steel housing and internal parts in contact with gas
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NACE MR0175-2000 compliant
Application Scenarios:
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Industrial gas turbine power generation
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Compressor drive applications
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Mechanical drive gas turbines
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Dry Low Emission (DLE) multi-valve turbine configurations
Working Principle: The onboard electronic driver receives digital commands via DeviceNet/CANopen, driving the high-torque actuator to position the self-cleaning shear-type metering valve, thereby precisely regulating gas flow to the turbine.
Installation Requirements: Install using 2.00 inch RF flanges per ANSI B16.5 Class 600. Ensure gas filtration of 25 µm absolute upstream of the valve. Maintain ambient temperature within –40 to +93 °C.
Usage Notes: Do not exceed 5,171 kPa (750 psig) gas supply pressure. Observe a minimum pressure differential of 138 kPa (20 psid) for specified flow control accuracy. The valve has a heat soak rating of 125 °C for 6 hours unpowered.
