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Woodward 8917-011
Product Name: Model 1907 Large Liquid Fuel Valve (Specific Configuration Version, VRT-1250 Series)
Product Introduction: This model belongs to the Woodward 1907 series large liquid fuel valve family and is part of the VRT-1250 configuration series. Based on the common platform of the 1907 series, this configuration version is designed for precise liquid fuel metering in industrial gas turbines, working in conjunction with servos and acceleration limiter assemblies.
Detailed content
Technical Specifications:
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Platform-level specifications (reference for VRT-1250 series):
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Rated metering differential pressure: 345 to 827 kPa (50 to 120 psid)
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Flow turn-down ratio: 30:1
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Minimum fuel flow: 68 kg/h (150 lb/h)
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Maximum metering fuel flow: 11340 kg/h (25000 lb/h)
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Fuel filtration accuracy: 20 microns or finer
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Fuel water content limit: 0.1% by volume
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Operating temperature range: -28 °C to +103 °C
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(Note: Exact maximum inlet/outlet pressure and flow rating for this specific configuration should be verified against the individual valve’s nameplate or Woodward’s detailed configuration data.)
Functional Features:
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Rotary sleeve metering structure with lever-driven external actuator
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Built-in differential pressure regulator for constant differential pressure maintenance
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Optional LVDT position feedback for closed-loop electronic control
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Optional solid piston limiter for acceleration fuel limiting
Application Scenarios: Suitable for liquid fuel industrial gas turbines in power generation, mechanical drive, and marine propulsion systems.
Performance Parameters: Metering accuracy is ±5% of actual flow or ±0.5% of maximum rated flow. Valve stroke time from full open to full close is less than 100 ms; shut-off response time is less than 100 ms.
Material Composition: Valve body is available in aluminum alloy or stainless steel; internal wetted parts use corrosion-resistant materials; sealing components use fluorocarbon rubber (FKM).
Structural Features: Rotary sleeve metering structure; valve body integrates bypass valve and differential pressure regulator; fuel connections use MS33786-20 standard interfaces, with optional overboard drain interface.
Working Principle: Fuel enters from the inlet, is precisely regulated by the metering port, and delivered to the combustion chamber; the excess returns via the bypass valve. The differential pressure regulator maintains constant differential pressure across the metering port. Adjusting the metering sleeve angle changes the effective flow area, achieving precise flow control under constant differential pressure.
Installation Requirements:
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Must be used with a positive displacement fuel pump
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Valve body fixed to rigid foundation; overboard drain port connected to fuel collection system with back pressure ≤ 69 kPa (10 psig)
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Strictly prohibit blocking the overboard drain port
Usage Precautions:
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Fuel filtered to 20 microns or finer, water content ≤ 0.1% by volume
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Periodically inspect overboard drain port leakage; replace shaft seal through Woodward service if wear is detected
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Before first start-up after prolonged shutdown, check valve flexibility and actuator calibration
