A diaphragm valve is a type of valve that uses a flexible diaphragm to cut off or regulate fluid flow. It is commonly used in applications requiring high cleanliness, leak-proof design, and corrosion resistance. Its name comes from its core component—the diaphragm. A diaphragm valve mainly consists of a valve body, valve cover, diaphragm, and valve stem.

The working principle of a solenoid valve can be simply summarized as follows: it uses electromagnetic force to control the opening or closing of the valve. Its core is an electromagnet consisting of a coil and an iron core. By energizing or de-energizing the coil, the movement of the valve core is controlled, thereby connecting or disconnecting the fluid flow path.