Woodward 5466-425 Fuel Metering Valve (FMV) Actuator
Parameter Name
Parameter Value
Product Model
Woodward 5466-425
Manufacturer
Woodward
Product Type
Fuel Metering Valve (FMV) / Actuator
Actuator Type
Electro-Hydraulic Servo Valve (EHSV) or Direct Drive Motor (DDV)
Input Signal
Typically ±10 VDC or 4-20 mA from the turbine controller
Position Feedback
LVDT (Linear Variable Differential Transformer) or RVDT (Rotary Variable Differential Transformer) for closed-loop control
Pressure Rating
Designed for high fuel inlet pressures (e.g., 500-1500 psig, specific to application)
Flow Capacity
Sized for the specific turbine’s fuel flow requirements
Linearity & Hysteresis
High precision (e.g., <0.5% full scale)
Response Time
Fast, capable of responding to rapid load demands
Materials
Stainless steel, high-strength alloys compatible with fuel (natural gas, diesel)
Operating Temperature
-40°C to +120°C (or higher, depending on installation)
Connections
SAE or NPT ports for fuel inlet and outlet; electrical connector

Technical Specifications

The Woodward 5466-425​ delivers critical performance through its closed-loop servo control system.

The core of its operation involves comparing the valve’s actual position (measured by the integrated LVDT/RVDT) to the desired position commanded by the turbine controller.

Any difference (error) between these two signals is amplified and used to drive the actuator—either by porting hydraulic fluid to a piston (in an electro-hydraulic design) or by turning a motor (in a direct drive design).

This continuous correction ensures the valve spool or poppet is positioned with extreme accuracy, resulting in precise fuel flow metering