What is the working principle of SOLENOID VALVES?

SOLENOID VALVES are indispensable key components in modern industrial control systems. They control the flow direction, flow rate, speed and other parameters of the fluid through electromagnetic force. They are widely used in heating systems, compressed air technology, industrial automation, water treatment and other fields.

The working principle of the solenoid valve is based on the electromagnetic induction phenomenon. When the electromagnetic coil is energized, a magnetic field is generated. This magnetic field attracts the valve core made of ferromagnetic material, causing it to overcome the spring force or medium pressure and move, thereby changing the opening and closing state of the valve. Specifically, the working process of the solenoid valve can be divided into the following steps. When the electromagnetic coil receives the control signal and is energized, a magnetic field is generated. This magnetic field interacts with the ferromagnetic material inside the valve core to generate an attractive force. Under the action of the electromagnetic force, the valve core is lifted up, the valve opens, and the fluid passes through. When the electromagnetic coil is de-energized, the magnetic field disappears, and the electromagnetic force disappears. At this time, the valve core is reset under the action of the spring force or medium pressure, the valve is closed, and the fluid channel is cut off.

The advantages of simple structure, convenient control and high reliability of the solenoid valve have been widely used in the field of industrial automation control. They can be used to control the flow of media such as gas, liquid or steam to meet various control requirements in the automated production process. For example, in pneumatic and hydraulic system control, solenoid valves can control the extension and retraction of cylinders or hydraulic cylinders. In heat exchanger control, solenoid valves can adjust the flow of cooling water. In medical equipment, solenoid valves can accurately control the delivery of drugs, etc.