What are the two types of solenoid valves?

As a precision electromagnetic control element, the solenoid valve mainly controls the opening and closing of the valve through electromagnetic force, thereby realizing automatic operation. Solenoid valves are mainly divided into the following two types:

1. Normally open solenoid valve

When the power is off, the normally open solenoid valve is in an open state, allowing the medium to flow freely. When the electromagnetic coil is energized, the electromagnetic force generated will drive the valve core to move, closing the valve, thereby blocking the flow of the medium. This type of solenoid valve is usually used in occasions where it needs to be opened for a long time and the opening time is longer than the closing time.

2. Normally closed solenoid valve

In contrast to the normally open type, the normally closed solenoid valve is in a closed state when the power is off, preventing the flow of the medium. When the electromagnetic coil is energized, the electromagnetic force attracts the valve core to move, opening the valve and allowing the medium to pass. This type of solenoid valve is more suitable for occasions where the flow of the medium needs to be strictly controlled, or where it is necessary to ensure that the medium does not flow when the power is off.

Both types of solenoid valves are widely used in industrial automation control systems. Which type to choose depends mainly on the specific application scenario and needs. For example, in situations where fast response and precise control are required, you may prefer a normally open or normally closed solenoid valve with a shorter response time and more precise control. At the same time, you also need to consider factors such as the nature of the medium, the parameters of the pipeline, the working pressure difference, and environmental requirements to ensure that the solenoid valve can meet the needs of the actual application.