A solenoid valve is an electromechanically operated valve. The valve is controlled by an electric current through a solenoid coil. When the coil is energized, a magnetic field is created that moves a plunger to open or close the valve orifice, regulating the flow of media.

A normally closed (NC) solenoid valve remains closed when de-energized and opens when power is applied. A normally open (NO) solenoid valve remains open when de-energized and shuts off the flow when electric current is supplied.

The seal material depends heavily on the media type and temperature. NBR is suitable for air, water, and light oils at moderate temperatures. EPDM is ideal for hot water and steam, while FKM (Viton) offers excellent chemical resistance and high-temperature capability.

Common failure causes include voltage fluctuations, fluid contamination blocking the armature, damaged seals due to chemical incompatibility, and operating the valve outside its specified pressure range.

For optimal performance and to prevent debris from settling in the armature tube, it is highly recommended to install the solenoid valve horizontally with the coil facing straight up.