The float vent valve prevents fuel leakage to the vent line of the fuel tank. When the fuel level reaches the inlet port of the vent line, the float vent valve closes this port so the fuel cannot flow to the vent line and thus leak from the tank. After the fuel level decreases, the float vent valve opens the vent line and connects the tank with the atmosphere again.
Tank protection system
Prevents fuel tank damage caused by pressure changes due to ambient temperature changes or fuel consumption during flight, ensuring safe operation and lower aircraft maintenance costs.
