What type of valve can regulate both pressure and flow in a hydraulic system?

A flow control valve is specifically designed to regulate the flow rate of a hydraulic fluid in a system, allowing it to control both flow and pressure. By adjusting the valve, the operator can change the amount of fluid that passes through, which impacts the speed and force of hydraulic actuators such as cylinders or motors. Additionally, many flow control valves incorporate pressure-regulating features that allow them to maintain specific pressure levels while controlling flow, providing a dual function that is essential for effective system performance.

In contrast, the other types of valves listed have distinct functions. A directional control valve is responsible for directing hydraulic fluid flow, but it does not regulate the pressure or flow rate. A pressure relief valve is designed to protect the system from excessive pressure by allowing fluid to escape, but it does not manage flow rates. A check valve permits fluid to flow in one direction only, preventing backflow, but it does not regulate pressure or flow. Thus, the flow control valve stands out as the correct answer for its ability to work on both pressure and flow in hydraulic applications.