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Woodward 8915-780
- Product Name: 3103 Gas Fuel Metering Valve complete with TM55 Electro-Hydraulic Actuator
- Product Introduction: The Woodward 8915-780 is a 3103 gas fuel metering valve with TM55 electro-hydraulic actuator, supplied as a GE gas turbine spare part. It provides reliable, self-cleaning fuel metering for heavy-duty industrial gas turbines.
- Technical Specifications: Same as 8915-712 — Maximum inlet pressure 45 bar (650 psig); operating temperature –40 to +250 °F (–40 to +121 °C); TM55 slew time 100 ms; time constant 25 ms; flow turndown up to 500:1; maximum gas flow up to 50,000 lb/hr.
Detailed content
- Functional Features: Self-cleaning rotary sleeve-and-shoe throttling valve; TM55 actuator provides over 300 lbf shearing force at sleeve OD to remove deposits and 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 compression and power generation.
- Performance Parameters: Time constant 25 ms; maintains metering accuracy through 30,000-hour overhaul intervals; minimum flow as low as 50 lb/hr.
- Material Composition: Stainless steel housing; through-hardened stainless steel metering sleeve and seal shoe; hard surface coatings.
- Structural Characteristics: Rotating metering sleeve with cut-through port; spring- and pressure-loaded seal shoe; converging flow path; guide tube directs heavy contaminants through the metering port.
- Working Principle: Identical to 8915-712. The TM55 actuator positions the sleeve based on electronic control demand, regulating the effective port area to control fuel flow.
- Installation Requirements: Same as 8915-712. Read all applicable Woodward publications before installation. Verify hydraulic power unit compatibility. Install 25-micron absolute upstream filtration. Confirm flow direction.
- Usage Precautions: Same as 8915-712. Operate within published pressure, temperature, and flow limits. Maintain gas cleanliness. Periodically inspect hydraulic pressure, oil condition, and electrical connector sealing. Return to Woodward for overhaul at the recommended interval.
