Which component in a hydraulic system directs the flow of fluid?

The correct answer is the selector valve because its primary function is to control and direct the flow of hydraulic fluid within the system. This component is pivotal because it determines the pathways through which the fluid travels, effectively managing the operation of different parts of the hydraulic system, such as actuators and other mechanisms.

The selector valve achieves this by opening and closing specific ports to either allow or restrict the flow of fluid, depending on the system’s requirements at any given time. This capability is crucial for ensuring that the hydraulic system operates smoothly and efficiently, coordinating the movement and power delivery necessary for various applications, such as flight control surfaces on an aircraft.

In contrast, the pump is responsible for generating the hydraulic pressure that moves the fluid, the actuating unit converts hydraulic energy into mechanical work, and the reservoir serves as a storage container for the hydraulic fluid. While these components are essential for the overall function of a hydraulic system, they do not have the role of directing the fluid flow like the selector valve.