What Is a Solenoid Valve? Do you know?

Various industries, such as the automotive industry, heating and air conditioning, food processing and water treatment, use solenoid valves. They allow for automatic fluid flow control. Solenoid valves are available in a variety of sizes, shapes, and designs. These include two-way, three-way, and four-way valves.

A solenoid valve is an electrically controlled device that allows for remote operation. Solenoids can operate on DC or AC power. Some solenoids also accept a connectorized cordset.
Depending on the design of the valve, a valve seat may or may not be present. Generally, a valve seat is made of corrosion-resistant material, and is located within the valve body.

The disc in a valve is usually made of corrosion-resistant materials, including corrosion-resistant brass, stainless steel, or polyamide. These materials offer good chemical and temperature resistance. They are also relatively cost-efficient.

The plunger in a solenoid valve is found in the center of the coil. When a current is applied, the coil generates an electromagnetic field around the armature. This electromagnetic field pushes or pulls the armature toward the stationary core part. This forces the plunger upward or downward inside the valve.

When electricity is switched off, the electromagnetic field no longer pushes the plunger up or down, and the valve stops. The spring then repositions the armature to its original position.
The core of a solenoid is a soft magnetic metal. It can be magnetized at low magnetic fields. Increasing the number of loops in the coil creates more magnetic field lines, and thus more force for actuating the valve.