Definition of Hydraulic directional valves


Definition of Hydraulic directional valves

Hydraulic directional valves refers to a hydraulic directional valve is composed of two or more  valves as the main body, and according to different working requirements as well as assisting devices such as shock valves, one-way valves, and charge valves. The selector valves can be divided into hydraulic manual directional valve, hydraulic solenoid directional valve, electric-hydraulic valves, pneumatic valves, etc. according to the way of operating the hydraulic control valve movement.

The hydraulic directional valves is a valve that uses the spool to make relative movement in the inside of valve body to connect or cut off the oil circuit to change the direction of the oil flow. 

The hydraulic directional valves is an integrated valve composed of a number of single-way hydraulic directional valve, safety relief valves, one-way valves and charged  valves. 

It has the advantages of compact structure and low pressure loss. 

The hydraulic directional valves  control loop can manipulate the movement of multiple actuators, and is mainly used for construction machinery, lifting and transportation equipments and other mobile machinery that requires centralized manipulation of multiple actuators. 

The control mode is mostly manual hydraulic directional valve. When the working pressure is high, the hydraulic pilot operated directional valve of the pressure reducing valve is adopted. According to the connection mode, the control circuit of the hydraulic directional valves is divided into three basic oil circuits: series, parallel, and series-parallel.


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