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Woodward 8915-870
- Product Name: 3103 Gas Fuel Metering Valve complete with TM55 Electro-Hydraulic Actuator
- Product Introduction: The Woodward 8915-870 comprises a 3103 rotary sleeve-and-shoe gas fuel metering valve paired with a TM55 electro-hydraulic actuator. It is designed for precise fuel flow scheduling in 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 throttling valve; through-hardened, hard-coated components for contaminant resistance; TM55 actuator rate limiting available in the increase-flow direction.
- Application Scenarios: Industrial gas turbines in the 5000–50,000 hp range; oilfield generator and compressor drives; gas turbine fuel control on sour gas.
- Performance Parameters: Maintains metering accuracy and dynamic response 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 on wear surfaces.
- Structural Characteristics: Rotating metering sleeve with cut-through port; spring- and pressure-loaded seal shoe; guide tube provides smooth flow path directing heavy contaminants through the metering port; converging flow path with no dead space.
- Working Principle: Identical to 8915-712. The TM55 actuator rotates the sleeve to adjust the metering port open area, controlling fuel flow under electronic control system demand.
- Installation Requirements: Same as 8915-712. Read the entire 3103 Installation and Operation Manual. Verify hydraulic supply compatibility with TM55. Install upstream 25-micron absolute gas filtration. Confirm flow direction marking.
- Usage Precautions: Same as 8915-712. Operate strictly within published limits. Maintain prescribed gas cleanliness (particles <10 µm at ≤30 ppm, >10 µm at ≤0.3 ppm). Regularly inspect hydraulic and electrical systems. Return actuator to Woodward for overhaul at the recommended interval.
