Excavator PC160-7 PC200-7 Safety valve 723-90-61300 hydraulic valve auxiliary relief valve

The working principle of the solenoid valve:

The electromagnetic valve of the excavator is an automatic basic component used to control the excavator fluid, which belongs to the actuator, and is not limited to hydraulic and pneumatic. Used in industrial control systems to adjust the direction of media, flow, speed and other parameters.

The solenoid valve can be combined with different circuits to achieve the desired control, and the precision and flexibility of the control can be guaranteed. There are many kinds of solenoid valves, different solenoid valves play a role in different positions of the control system, the most commonly used are check valves, safety valves, direction control valves, speed regulating valves and so on.

1, the difference between electric valve and solenoid valve
Solenoid valve is a magnetic coil after the electromagnetic coil is energized to generate magnetic attraction to overcome the pressure of the spring to drive the spool action, a solenoid coil, simple structure, cheap price, can only achieve switching;
The electric valve drives the valve stem through the motor to drive the spool action, and the electric valve is divided into (turn-off valve) and regulating valve. The turn-off valve is a two-position type of work that is fully open and fully closed, and the regulating valve is installed on the electric valve positioner, which makes the valve dynamically stable in a position through closed-loop adjustment.

2, electric valve and solenoid valve use comparison
Solenoid valve: Used for switching control of liquid and gas lines, it is two-position DO control. Generally used for small pipe control.
Electric valve: For liquid, gas and wind system pipeline medium flow analog adjustment, is AI control. In the control of large valves and wind systems, electric valves can also be used as two-position switch control.
Solenoid valve: can only be used as a switching quantity, is DO control, can only be used for small pipe control, commonly found in DN50 and below pipes.
Electric valve: can have AI feedback signals, can be controlled by DO or AO, compared to large pipelines and wind valves.