The differential valve enables the refueling of fuel tanks. The Valve opens the refueling line if fuel pressure occurs at the inlet port and the solenoid valve is energized. The Valve closes the refueling line if the solenoid is deenergized or after receiving a hydraulic signal from Float Valve.
The Differential Valve includes a safety overpressure Valve which protects the line between the ground refueling valve and the Differential Valve from overpressure in case of fuel volume expansion due to temperature changes.
Ground fueling management system
It is used on the ground to refuel and defuel the aircraft, allowing safe use of full tank capacity.
