A flow control valve is a combination of a ______.

A flow control valve is a combination of a ______.

• A. Relief and DCV
• B. Check and a relief valve
• C. Needle valve and a check valve
• D. DCV and a needle valve

Answer: (C)

Flow control in hydraulics is about metering how fast fluid can move through a line, so the actuator speeds can be controlled. A flow control device typically combines a needle valve, which provides adjustable throttling to set the exact flow rate, with a check valve, which prevents backflow. This pairing lets you slow down movement in one direction (through the throttled path) while allowing faster or unrestricted movement in the opposite direction (through the check valve bypass). That’s why the best description is a needle valve paired with a check valve. Other options mix different functions (like pressure relief or direction control) that don’t give the same one-way metering behavior.

Flow control in hydraulics is about metering how fast fluid can move through a line, so the actuator speeds can be controlled. A flow control device typically combines a needle valve, which provides adjustable throttling to set the exact flow rate, with a check valve, which prevents backflow. This pairing lets you slow down movement in one direction (through the throttled path) while allowing faster or unrestricted movement in the opposite direction (through the check valve bypass). That’s why the best description is a needle valve paired with a check valve. Other options mix different functions (like pressure relief or direction control) that don’t give the same one-way metering behavior.