The difference between single coil and double coil of solenoid valve

Solenoid valves are divided into double solenoid control and single solenoid control. Double solenoid control means there are two solenoid coils. Double coils should usually be solenoid reversing valves. Single coil is always energized to open the air intake, while double coil is energized instantly. The slide valve of single coil solenoid valve is spring reset, and the solenoid valve automatically resets after the solenoid valve loses power. Double coil solenoid valve requires the other coil to be energized to change position.

Double coil solenoid valve has two coils A and B. The action is as follows: A is not energized, B is not energized, and the solenoid valve is in the initial position. If A is energized and B is not energized at this time, the solenoid valve will reverse.

After A is energized, it loses power and B is not energized. The solenoid valve will no longer move and maintain the state when A is energized and B is not energized. If A is not energized and B is energized, the solenoid valve returns to the initial position. Next, A is not energized and B loses power. The solenoid valve does not move and is still in the initial position.

In general, if the A and B coils are not energized at the same time, the solenoid valve will maintain the state of A being energized (and B being de-energized) or B being energized (and A being de-energized).