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Woodward 8904-614
Product Name: Small Gas Fuel Valve (Woodward 8904-614), 1907-series small gas valve — Valve Only.
Overview: A Woodward 1907-series small gas fuel-metering valve supplied as a valve-only assembly under 8904-614. It provides core fuel-flow control for mid-size industrial gas turbines and gas engines, fully compatible with Woodward TM-series and EM-series actuators and electronic controls.
Detailed content
Technical Specifications:
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Series: Woodward 1907 Small Gas Valve
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Supplied Woodward number: 8904-614
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Configuration: Valve only (no actuator)
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Working medium: natural gas, treated clean fuel gas
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Filtration requirement: 25 µm absolute
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Pressure: per industrial gas-system standard
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Flow capacity: matched to mid-size turbine engines across full operating range
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Ambient temperature range: −20 °C to +80 °C
Material & Structure:
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Body: aviation-grade aluminum alloy or precision-cast stainless steel
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Metering plug: surface-hardened, precision-ground alloy steel
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Seals: fuel-grade FKM (fluoro-rubber) composite
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Fasteners: high-strength corrosion-resistant alloy steel
Structure Features: Precision metering port with a deterministic flow-vs-position relationship; standard flange or threaded connection ports; machined actuator mounting interface ensuring coaxiality; smooth internal flow path reducing turbulence, noise, and pressure loss; vibration- and shock-qualified structure.
Working Principle: Fuel gas enters through the inlet port, passes through the precision metering orifice, and flows to the turbine combustor. The external actuator receives the controller command and drives the metering plug to the target position, changing the effective flow area. The control system manages valve opening to regulate fuel quantity, thereby controlling turbine speed, power output, and exhaust temperature. The flow vs. position relationship remains deterministic and repeatable across the full stroke.
Application Scenarios: Mid-size industrial gas-turbine gensets; CHP and distributed-energy systems; gas-engine fuel management; marine and offshore gas-power packages; industrial-process gas metering and control.
Installation Requirements:
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Install strictly per the flow-direction and orientation markings on the valve body
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Fit the specified gas filter upstream and downstream as required
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Choose a location that allows actuator mounting, wiring, and maintenance access
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Support the pipeline independently to avoid concentrated stress on the valve body
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Perform system purge, pneumatic/gas leak test, and full-stroke functional verification before commissioning
Usage Notes:
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Gas cleanliness directly affects valve life and control accuracy; maintain the filtration system on schedule
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Strictly follow gas-system fire and explosion-protection procedures
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Periodically inspect external seals, fasteners, and actuator mounting condition
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Do not operate beyond the rated pressure, temperature, or in abnormal high-vibration conditions
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When decommissioned for long periods, plug the inlet/outlet ports and store in a dry, ventilated, temperature-controlled environment
