Refuelling Cut off Valve
Hi
I am curious how the refuelling valve auto cut off when the fuel is fully filled in the fuel tank
Example : If now the aircraft fuel tank contain 20 degree celcius of fuel inside the tank
The fuel bouser refill a fuel of 40 degree celcius into the fuel tank
Hence fuel expanded in volume
but how the refuelling valve auto cut off when fuel is full
how does it know when is it full
thank you