The Difference Between Single Coil Solenoid Valve and Double Coil Solenoid Valve

Solenoid valves are divided into double electric control and single electric control. Double electric control means that there are two solenoid coils. The double coils should usually be electromagnetic directional valves. The single coil is always charged into the air and the double coil is energized instantaneously. The spool valve of the single-coil solenoid valve is spring-returned, and the solenoid valve automatically resets after the solenoid valve is de-energized. The double-coil solenoid valve needs the other side of the coil to be energized to change the position.

The 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 at this time, B is not energized, and the solenoid valve moves in reverse.
After A is energized, it is de-energized, and B is not energized, and the solenoid valve will no longer operate, maintaining the state when A is energized and B is not. When A is not energized, B is energized, and the solenoid valve returns to the initial position. In the next step, A is not energized, B is de-energized, the solenoid valve does not operate, and it is still in the initial position.

In general, if the coils A and B are not energized at the same time, the solenoid valve maintains the state when A is energized (while B is energized) or B is energized (and A is energized).
Electromagnetic valve (Electromagnetic valve) is an industrial equipment controlled by electromagnetic. It is an automation basic component used to control fluid. It belongs to actuator and is not limited to hydraulic and pneumatic. Used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium.


1. The number of electromagnetic coils is different.
The single solenoid valve has only one solenoid coil; the double solenoid valve has two solenoid coils.

2. Different purposes.
Single solenoid valves are generally used for 2-position 3-port solenoid valves; dual-control solenoid valves are generally used for 2-position 5-port solenoid valves.

The solenoid coil is an important part of the solenoid valve. As a professional solenoid valve manufacturer, brs can provide you with the most professional electromagnetic coil products. If you have requirements, please contact us.
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