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Woodward 8915-714
- Product Name: 3103 Gas Fuel Metering Valve complete with TM55 Electro-Hydraulic Actuator
- Product Introduction: The Woodward 8915-714 shares the identical valve/actuator configuration as the 8915-712 — a 3103 rotary gas fuel metering valve paired with a TM55 electro-hydraulic actuator. It is intended for use as a GE gas turbine spare part in industrial fuel metering applications.
Detailed content
- Technical Specifications: Same as 8915-712 — Maximum inlet pressure 45 bar (650 psig); operating temperature –40 to +250 °F (–40 to +121 °C); TM55 minimum valve slew time 100 ms; flow turndown up to 500:1; maximum gas flow up to 50,000 lb/hr.
- Functional Features: Self-cleaning rotary sleeve-and-shoe throttling design; through-hardened, hard-coated components for contaminant resistance; TM55 actuator provides >300 lbf shearing force to cut through light debris such as pipe scale.
- Application Scenarios: GE gas turbine fuel systems; industrial gas turbines in the 5000–50,000 hp range; oilfield power generation and compression.
- Performance Parameters: Time constant 25 ms; actuator rate limiting available in the increase-flow direction; maintains metering accuracy over a 30,000-hour overhaul cycle.
- Material Composition: Stainless steel housing; through-hardened stainless steel metering sleeve and seal shoe; hard surface coatings on wear surfaces.
- Structural Characteristics: Rotating metering sleeve with cut-through port; spring- and pressure-loaded seal shoe; guide tube directs heavy contaminants through the metering port; converging flow path eliminates dead space.
- Working Principle: Identical to 8915-712. The TM55 actuator positions the sleeve based on electronic control demand, regulating the metering port open area to control fuel flow.
- Installation Requirements: Same as 8915-712. Read all applicable Woodward publications prior to installation. Verify hydraulic power unit compatibility with TM55 requirements. Install upstream gas filtration at 25-micron absolute. Confirm flow direction marking matches the system design.
- Usage Precautions: Same as 8915-712. Never operate beyond published pressure, temperature, or flow limits. Maintain prescribed gas cleanliness. Inspect sealing surfaces and resolver feedback regularly. Return to Woodward for overhaul at the recommended interval.
