ZF Hydraulic & Pneumatic parts Co., Ltd

ZF Hydraulic & Pneumatic parts Co., Ltd

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Control valve classification

Author : Xiong Date : 10/4/2012 3:24:33 AM
Control valve classification
 
1, control valve according to its control mode classification
 
General have hand, foot, motor, pneumatic, electric and hydraulic etc, and is sometimes several ways in the form of combination.

2, control valve according to its function classification
 
(1) the direction control valve, this kind of valve, such as check valve and reversing valve, etc., are used to control the oil flow direction, in order to realize the implementation of the components of start, stop, advance and retreat.
 
(2) pressure control valve, this kind of valves, such as relief valve, relief valve and sequence valve, etc., are used to control the hydraulic system of pressure, in order to meet the execute component need force, torque or working procedure's control.
 
(3) flow control valve, this kind of valve, such as throttle valve and control valve, etc., are used to control the hydraulic system of oil flow size, in order to realize execute component need movement speed.
 
3, according to control principle classification
 
There are usually switch valve, proportional valves, servo valve and digital valve. Switch valve setting only in setting state after work. Proportional valve and servo valve can according to the input signal connection or proportional to the parameters of the control system. Digital valve side with digital signal directly control valve action.
 
4, according to the working pressure classification
 
According to the control valve in the hydraulic system working pressure is divided into: low pressure valve, medium pressure valve and high pressure valve.

The obove: DB/DBW type pilot relief valve is used to control the hydraulic system