he flow control valve is used to control the speed and load of an actuator.

These valves are also called needle valves as a simple cone modifies the oil flow gauge (choke) by adjusting the flow rate via a manually controlled screw. A two-way flow controller is used to vary the flow in both directions. A one-way flow regulator is used to allow adjustment in one direction and allow free return in the opposite direction.

These valves are available in in-line flow control (one-way and two-way) and 90° flow control (one-way and two-way).

When the actuator is subject to load variations, as in most cases, flow control is ineffective. To avoid this, a compensated flow control valve should be used.

The compensated flow valve, thanks to the compensator inside of it, compresses or releases the spring to maintain a pressure difference and thus a constant flow.

Flow control valves also include the choke screw, which is used to regulate the flow in both directions when precise regulation is not required.