Which valve maintains fuel balance by shutting off fuel flow to the light wing tank?

The transfer valve is responsible for maintaining fuel balance by controlling the flow of fuel between the fuel tanks in an aircraft, specifically by shutting off fuel flow to the light wing tank when necessary. This function is crucial to ensure that the aircraft maintains proper weight distribution and balance during flight.

By regulating the fuel supply, the transfer valve helps to ensure that fuel is efficiently used and that the aircraft remains within its operational parameters. This control of fuel flow is essential during different phases of flight, especially as fuel in the heavier tank is consumed, preventing the light wing tank from drawing fuel that could disrupt balance.

Other valves, such as the outlet, pressure, and Venturi valves, serve different functions in the fuel system, such as regulating outlet pressure or facilitating fuel transfer but do not specifically handle the task of maintaining fuel balance in the way that the transfer valve does.