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Woodward 8915-877
Product Name: Woodward 8915-877 — Control Valve, Liquid Fuel TM55P / 1907 Large Liquid
Product Description: The 8915-877 is a control valve assembly consisting of a TM55P integrating actuator driving a 1907 Large Liquid Fuel Valve. It is engineered for gas turbine liquid fuel metering in demanding industrial applications.
Technical Specifications: Shares the 1907 Large Liquid Fuel Valve specifications — metered fuel flow 30:1 turndown up to 11,340 kg/h (25,000 lb/h); fuel inlet pressure up to 9,377 kPa (aluminum body) or 17,238 kPa (stainless steel body); differential pressure 345–827 kPa; fuel viscosity 0.5–12.0 cSt; specific gravity 0.77–0.91.
Detailed content
TM55P Actuator: Integrating actuator with aluminum case and through-hardened stainless steel internal parts; converts electrical signal to hydraulic pressure; provides electrical position feedback; UL approved for Class I, Division 1.
Fuel Compatibility: Full range of diesel, kerosene, gasoline, distillate, naphtha, gas turbine fuel, fuel oil, and biodiesel fuels compatible with FKM elastomers.
Functional Features:
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Precision fuel metering with differential pressure regulation
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Closed-loop position control via electrical feedback transducer
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Hazardous area certified actuator
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Fail-safe operation
Application Scenarios: Industrial gas turbines, power generation plants, oil & gas facilities, marine turbine installations requiring liquid fuel metering with hazardous area compliance.
Material Composition: Aluminum or stainless steel valve body; through-hardened stainless steel actuator internals; fluorocarbon (FKM) seals.
Working Principle: The TM55P actuator receives an electrical positioning signal from the Woodward control system, converts it to hydraulic pressure, and mechanically positions the 1907 fuel valve plunger. A differential pressure regulator within the valve maintains constant pressure drop across the metering port, ensuring stable fuel flow proportional to valve position. The electrical position feedback transducer reports actual valve position to the control system for closed-loop accuracy.
Installation Requirements:
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Read entire manual before installation, operation, or servicing
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Install valve square with actuator linkage to prevent binding
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Properly allocate actuator travel (two-thirds between min/max)
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Use specified hydraulic fluid
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Follow all plant and safety instructions and precautions
Usage Precautions:
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Maintain strict fuel cleanliness: 20 μm filtration, water ≤0.1%, particulates ≤1.0 mg/L
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Unauthorized modifications outside specified limits constitute misuse, exclude warranty coverage, and invalidate product certifications
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Failure to follow instructions can cause personal injury and/or property damage
