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Woodward 9904-267

Product Name:​ 9904 Series Liquid Bypass and Shut-off Valve
Product Introduction:​ This model is part of the Woodward 9904 series liquid bypass and shut-off valve platform. The valve is used for flow control or shut-off functions in gas turbine liquid fuel supply systems, working with Woodward actuators and control systems to achieve reliable fuel flow control or emergency shut-off.

Detailed content

Technical Specifications:
  • Applicable Fuel Types: Diesel, kerosene, gasoline, aviation fuel, and compliant distillate oils
  • Fuel Filtration: 25 microns or finer
  • Fuel Water Content Limit: 0.1% by volume
  • Fuel Viscosity Range: 1.8 to 10 cSt (32 to 58 SSU)
  • Fuel Specific Gravity Range: 0.82 to 0.85
  • Maximum Fluid Supply Pressure: 1200 psig (8274 kPa)
  • Proof Test Fluid Pressure: 1800 psig (12411 kPa), minimum 2 minutes
  • Minimum Burst Fluid Pressure: 6000 psig (41370 kPa), minimum 1 minute
  • Fuel Temperature Range: 0 to +200°F (-18 to +93°C)
  • Ambient Temperature Range: -20 to +180°F (-29 to +82°C)
  • Storage Temperature Range: -40 to +180°F (-40 to +82°C)
  • Fluid Ports: 2-inch (50 mm) or 3-inch (75 mm) SAE J518 Code 61 flanges
Functional Features:​ Constructed with corrosion-resistant materials suitable for various liquid fuel environments; highly compatible with Woodward actuators and control systems; provides precise fuel flow control or reliable shut-off capability; robust structure suitable for industrial and marine environments; complies with ATEX, PED, and Machinery Directive EU regulations.
Application Scenarios:​ Applicable to liquid fuel supply control in gas turbine power generation, mechanical drive, and marine propulsion systems. Compatible with diesel, JP series aviation fuel, kerosene, gasoline, and other compliant international standard distillate oils.
Performance Parameters:​ Flow control accuracy meets industrial gas turbine control requirements with wide flow regulation range and rapid response. In shut-off configuration, leakage complies with ANSI B16.104 Class IV standard.
Material Composition:​ Valve body and internal flow components use corrosion-resistant alloy or stainless steel materials; seals use fluorocarbon rubber suitable for various liquid fuel environments.
Structural Features:​ Standard Woodward liquid fuel valve structure with standardized actuator adaptation interface for easy field installation and maintenance. Three-way valve body design enables fluid switching between inlet-to-turbine or bypass circuit.
Working Principle:​ The valve is driven by an external actuator to adjust the valve position opening, changing the fuel flow area to achieve fuel flow output proportional to the control system command. In shut-off configuration, the valve body quickly switches to bypass position under spring force or hydraulic pressure, cutting off fuel supply and diverting fluid back to the tank.
Installation Requirements:
  • Install in gas turbine fuel supply main pipeline
  • Use compliant standard fasteners for valve body fixation
  • Execute electrical wiring per accompanying actuator and control system requirements
  • Reserve adequate maintenance space for regular inspection
Usage Precautions:
  • Fuel must be filtered to 25 microns or below; water content controlled within 0.1% by volume
  • Regularly inspect electrical connection tightness
  • Avoid long-term operation beyond specified temperature ranges
  • Must cut off fuel supply and confirm system is depressurized before maintenance

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