Which component in a hydraulic system controls the flow rate?

In a hydraulic system, valves play a crucial role in controlling the flow rate of the hydraulic fluid. Valves can be designed to open, close, or restrict the flow of fluid, thereby regulating how much fluid can pass through at a given time. This flow control is essential for achieving precise movement and operation of hydraulic machinery and systems.

Valves can also serve additional functions, including directing flow to various components and managing pressure within the system. By manipulating the flow rate, valves help maintain optimal performance and efficiency in hydraulic applications.

While accumulators store hydraulic fluid and assist with maintaining pressure, actuators convert hydraulic energy into mechanical motion, and filters remove contaminants from the fluid, none of these components are specifically designed to control the flow rate as effectively as valves do. This is why valves are the correct answer in the context of flow rate control in hydraulic systems.