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Woodward 9908-270
Product Name: GS16 Gas Valve (part number 9908-270)
Product Overview: The 9908-270 is part of the Woodward GS16 series of electronically driven gas control valves. It provides a reliable, economical interface between electronic controls and gas turbines for power generation, compressor, or mechanical drive use, targeting industrial gas turbines rated 10 to 50 MW, and is compatible with base turbine and Dry Low Emission multi-valve installations.
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 structure
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Integrated onboard electronic driver
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High-torque actuator for extended operation across gas fuel types
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Precise gas 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 plants
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Pipeline compressor drives
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Mechanical drive gas turbines
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DLE turbine multi-valve configurations
Working Principle: Upon receiving digital commands via DeviceNet/CANopen, the onboard driver energizes the high-torque actuator, which positions the shear-type metering valve to achieve accurate gas flow regulation.
Installation Requirements: Mount using 2.00 inch RF flanges per ANSI B16.5 Class 600. Upstream gas filtration must be 25 µm absolute. Keep gas temperature within –40 to +93 °C.
Usage Notes: Do not operate above 5,171 kPa (750 psig) gas supply pressure. Maintain a minimum pressure differential of 138 kPa (20 psid) for specified flow control accuracy. The valve is rated for 125 °C heat soak for 6 hours unpowered.
