Working principle of electro-hydraulic reversing valve

 

When the coil of two solenoid valves is energized, the balance hole circuit is closed, the discharge hole circuit is opened, the pressure is relieved in the piston upper chamber, the piston goes up, and the valve is opened. Instead, the piston moves down and the valve closes. In the process of open and close the valve, and the flow rate (velocity) signal plug position signal transmitted to the computer, to send out the corresponding instruction after computer processing and control of two electromagnetic pilot valve, power status, make changes on inferior vena hydraulic differential piston, so as to control the piston in the open, the control system for the pipe flow of medium.