At the core of the low voltage solenoid valve is its electromagnet, which consists of a coil wrapped around a magnetic core. When an electric current is applied to the coil, it generates a magnetic field that moves a movable part known as the plunger or armature. This movement either opens or closes the valve, allowing or stopping the flow of the fluid. Upon cutting the electrical current, the magnetic field dissipates, and a spring mechanism typically restores the valve to its original position.

    There are two primary configurations of low voltage solenoid valves： normally closed (NC) and normally open (NO). In a normally closed solenoid valve, the valve remains shut when no power is applied, requiring electricity to open it. Conversely, a normally open valve stays open in the absence of power and closes when energized. This fundamental design flexibility allows them to be employed in various fluid control scenarios.