What is the purpose of control valves in a hydraulic system?

Control valves play a crucial role in a hydraulic system by regulating the flow and pressure of hydraulic fluid. This regulation is essential because it allows for precise control of the system's operation, ensuring that the hydraulic components can function effectively according to operational demands.

By adjusting the flow rate, control valves help in determining how much fluid moves through the system and at what speed, which is vital for the controlled movement of actuators such as cylinders and motors. Additionally, by manipulating pressure, these valves help to prevent system overloads and maintain safe operating conditions, thus protecting components and ensuring smooth operation.

The other options describe functions that do not align with the specific responsibilities of control valves. For example, pumping hydraulic fluid is a function performed by hydraulic pumps; storing fluid is the role of reservoirs; and converting pressure into mechanical work is typically the function of hydraulic cylinders or motors, which utilize the regulated flow and pressure established by control valves.