I. Product Basic Information  

Brand: Woodward (USA)  

Model: 9907-685 (GS16 Series Integrated Electrically Actuated Gas Control Valve)  

Category: Aero-derivative gas turbine fuel metering valve, integrated servo drive + position feedback  

Key Specifications  

Table  

Item | Specification  

Bore Size | 1.5 inches (DN40)  

Pressure Rating | Up to 750 PSI (approx. 5.17 MPa)  

Maximum Gas Flow Rate | 30,000 lb/h (≈13,607 kg/h)  

Maximum Medium Temperature | 93°C (200°F)  

Feedback Element | Built-in single-channel resolver  

Communication Protocol | Analog signal / DeviceNet / CANopen (three options available)  

Drive Type | Integrated internal servo driver within valve body; no external amplifier module required  

Product Features  

Precise Fuel Metering: Receives 4–20 mA or bus commands from the unit control system (FADEC/505/NetCon), linearly regulating gas flow to control turbine speed and load.  

Self-Cleaning Shear-Type Valve Plug: Shear-type throttling design resists clogging by contaminants and withstands high-temperature, dirty gas conditions.  

Closed-Loop Position Feedback: Resolver continuously monitors plug stroke with full closed-loop PID control, achieving positioning accuracy of ±0.5% FS.  

Integrated Design: Valve body, servo drive, and position detection are fully integrated, eliminating the need for external actuators and simplifying field piping and wiring.  

Application Scenarios  

Aero-derivative Gas Turbines: LM2500, LM6000, RB211, and other power generation units;  

Oil & Gas Facilities: Natural gas compression units, pipeline booster turbines;  

Distributed Power Plants / Private Power Stations: Industrial gas turbine power generation, combined heat and power (CHP) unit main fuel control valves.  

 Compatibility and Replacement  

Same Series: Full GS16 series valve bodies (9907-68X model variants; 685 is the standard 1.5-inch version);  

Compatible Drives: No external amplifier required—directly connects to Woodward controller analog or bus ports;  

Spare Parts: Original factory discontinued part; currently available on market primarily as refurbished or brand-new imported units; commonly used as replacement parts during power plant overhauls.