A device used in hydraulic transmission to control the pressure, flow, and direction of a fluid.The pressure control valve is called the pressure control valve, the flow control valve is called the flow control valve, the flow control valve is called the direction control valve.
According to the purpose is divided into one-way valve and reversing valve.
One-way valve: only allow the flow in the pipeline one-way through, the reverse cut off.
Reversing valve: change the on/off relationship between different pipelines, and divide the spool into two or three positions according to its working position in the valve body; According to the number of controlled channels are divided into two, three, four, five, etc.; According to the spool drive mode break up, mobility, electric, hydraulic and so on.
Flow control valve: the throttle area between the regulating valve core and valve body and the local resistance generated by it are used to adjust the flow so as to control the speed of the actuator.