Woodward 8915-770

Digital guide

Product Name: 3103 Gas Fuel Metering Valve complete with TM55 Electro-Hydraulic Actuator
Product Introduction: The Woodward 8915-770 consists of a 3103 rotary sleeve-and-shoe gas fuel metering valve driven by a TM55 electro-hydraulic actuator. It is configured for heavy-duty industrial gas turbine fuel metering applications.
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.

Functional Features: Self-cleaning throttling valve; TM55 actuator provides high shearing force to remove deposits; through-hardened components for sour gas service.
Application Scenarios: Industrial gas turbines in the 5000–50,000 hp range; oilfield power generation and compression; gas turbine fuel control on contaminated gas.
Performance Parameters: Time constant 25 ms; maintains 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; guide tube directs 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 regulate the metering port 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 power unit compatibility. Install 25-micron absolute upstream filtration. Confirm flow direction.
Usage Precautions: Same as 8915-712. Operate within published limits. Maintain gas cleanliness. Regularly inspect hydraulic and electrical systems. Return actuator to Woodward for overhaul at the recommended interval.