Which components are used to regulate and control fuel flow in aircraft and engine fuel systems?

Regulating and controlling fuel flow in aircraft and engine fuel systems is primarily the function of valves. Valves are critical components that manage the direction, pressure, and flow rate of the fuel as it moves through the system. They can open or close in response to various conditions, such as engine demands or system pressure, ensuring that the correct amount of fuel reaches the engine at all times.

In contrast, while filters, pipes, and pumps are vital in the overall fuel system, they serve different purposes. Filters are used to remove impurities from the fuel, ensuring that only clean fuel reaches the engine. Pipes are conduits that transport fuel but do not have the capability to control flow direction or rate. Pumps are essential for moving the fuel from one place to another, providing the necessary pressure to send fuel to the engine. However, they do not regulate flow once the fuel is in the lines. Thus, valves stand out as the primary control devices for managing fuel flow in aircraft engine systems.