When the solenoid coil is electrified, the static iron core generates electromagnetic attraction to the moving iron core, and the solenoid force is used to switch the valve core to change the direction of the air flow, which is called solenoid valve for short. This kind of pneumatic solenoid valve 220v is easy to realize electric and pneumatic combined control and complex control, and can be operated over a long distance, so it is widely used.
