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Woodward 9908-269
Product Name: GS16 Gas Valve (part number 9908-269)
Product Overview: The 9908-269 belongs to the Woodward GS16 series of electronically driven gas control valves, serving as a critical interface between electronic control systems and gas turbines in power generation, compressor, and mechanical drive applications. It is designed for industrial gas turbine engines rated between 10 and 50 MW and supports both base turbine and Dry Low Emission multi-valve configurations.
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
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Onboard electronic driver module
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High-torque actuator
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Precise fuel flow metering
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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Gas compressor drives
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Mechanical drive turbines
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DLE multi-valve turbine systems
Working Principle: The onboard driver interprets digital commands from the control system and positions the actuator, which in turn drives the self-cleaning shear-type metering valve to regulate gas flow with high precision.
Installation Requirements: Use 2.00 inch RF flanges conforming to ANSI B16.5 Class 600. Provide 25 µm absolute gas filtration upstream. Operate within the –40 to +93 °C gas temperature range.
Usage Notes: Maximum gas supply pressure is 5,171 kPa (750 psig). A minimum pressure differential of 138 kPa (20 psid) is recommended for specified flow control accuracy. The valve can withstand 125 °C for 6 hours unpowered.
