Common flow control valves are classified into 5 types based on their purpose.

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Common flow control valves regulate flow by adjusting the area of the throttle opening between the valve spool and the valve body, as well as the local resistance generated there, thereby controlling the movement speed of the actuator. Flow control valves are classified into 5 types based on their purpose. Throttle valve: After adjusting the area of the throttle opening, it enables the speed of actuators for which large variations in load pressure are not required and for which high levels of motion uniformity are not essential to remain essentially stable. Throttle valve: It maintains a constant pressure difference between the inlet and outlet of the throttle valve when the load pressure changes. In this way, once the area of the throttle opening is set, regardless of how the load pressure changes, the speed control valve can maintain a constant flow rate through it, thereby keeping the movement speed of the actuator stable. Diversion valve: A valve that enables two actuators connected to the same oil source to receive an equal flow rate, regardless of the load, is known as an equal-flow diversion valve or a synchronous valve; one that provides a proportionally distributed flow rate is called a proportional diversion valve. Collecting valve: Its function is the opposite of that of a distributing valve; it distributes the flow rate entering the collecting valve in proportion. Shunt collector valve: combines the functions of both a shunt valve and a collector valve.