Features and Benefits:
- Precise turbine control - allows a single valve to be used where two valves were previously required * Full stroke operating speed of 350ms
- Digital optical encoder provides absolute repeatability of +/-0.3% of stroke
- Carbon steel or stainless steel construction - durable for long life *All electric - eliminates need for a hydraulic actuation system
Typical applications :
- Custom designed specifically for gas fuel control (metering) for industrial or aero- derivative gas turbine
- Combined with AMOT’s 4420 fuel shutoff valve, the 8402 can provide the complete gas turbine fuel control solution
8402 GAS FUEL METERING VALVE
The 8402G Fuel Valve System is a balanced rotary valve with an electric stepper-motor actuator. This high performance gas turbine fuel control valve with fast operation speed and large turn down ratio is designed for reliable an efficient control of any gas turbine.
To meet the demands of virtually any industrial or aero-derivative gas turbine, the 8402 is equipped with an electric stepper-motor actuator, which can fully stroke the valve in only 350ms. The valve itself has a 500:1 turn down ratio which, in many applications, allows a single 8402 valve to provide precise fuel delivery to the turbine from light off to maximum power. This combination of features enables the value to enhance the performance of any gas turbine or turbomachinery train.A key element in the performance of any fuel valve is the type and reliability of the position measurement device. Accuracy in position measurement is what allows the valve to make the turbine operating in its maximum efficiency range while maintaining the safety of the machine and the entire turbomachinery train.
This system provides a position accuracy of 0.18° with respect to set point. A 4-20mA position signal feedback is provided. The acceleration/ deceleration profiles of the stepper-motor are optimized for speed and torque by the control logic.
