A solenoid valve is an electromagnetic device for hydraulic lines that uses an electric current to generate a magnetic field, which drives a solenoid that controls the flow of fluid in the valve.

Solenoid valves are not to be confused with electrically controlled valves. Electronically controlled valves have an electrical actuation system that is detachable from the valve body. Solenoid valves, on the other hand, are constructed of one unit and cannot separate the operating system from the solenoid valve body. Solenoid valves are generally more compact than regular valves.

When should a solenoid valve be used?

If the flow of liquid or gas needs to be controlled, either automatically or on/off, a solenoid valve is required. In other words, you can use solenoid valves to open or close circuits, meter products, mix gases or liquids, and more.

Applications range from the control of standard process valves to the control of specific valves, such as overpressure protection systems and emergency shut-off valves, as well as fluid control in applications such as fire protection system valves. One advantage of solenoid valves compared to conventional valves is their extremely fast response time. Therefore, they can be found in the following applications:

– In the compressor: During the starting phase, the solenoid valve is used to discharge the gas to reduce the torque on the engine.

– In agriculture: In irrigation systems, the low response time of the solenoid valve saves a lot of water.

– In some specific cases, such as industrial presses, where the failure of a solenoid valve may present an accident risk to the operator, a two-body valve can be used. These are usually 3/2-way solenoid valves with a dual valve system that compensates for possible failure of one of them.

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