Which component is responsible for controlling the direction and flow amount in a fluid system?

The component that is responsible for controlling the direction and flow amount in a fluid system is the valve. Valves act as control devices within a fluid system, allowing operators to open, close, or throttle the flow of fluids to achieve the desired operational conditions. This capability enables precise regulation of flow rates and pressure, which is crucial in various applications, from industrial processes to everyday plumbing systems.

While pumps are essential for moving fluids through a system, their primary function is to create flow rather than control it. Actuators can manipulate mechanical systems but do not directly control fluid flow. Reservoirs serve as storage for fluids, ensuring a regular supply but do not have a role in regulating flow. Thus, the valve stands out as the key component for managing fluid dynamics effectively.