Before understanding the working principle of the pneumatic diaphragm valve, let’s briefly understand what a diaphragm valve is. It is a relatively special blocking valve. Each time it is used, one of the inside of it is made of soft material. The diaphragm will play a big role, so it is called this name. It has many features, and most importantly, its operation is relatively simple, so it has always been loved by many factories.

The working principle of the pneumatic diaphragm valve is generally different from that of the electric one, and a large part of it refers to the difference in the driving method of the two. To put it simply, the pneumatic diaphragm valve is actually a kind of compression of the gas to generate a certain pressure so that the piston in the valve can move normally, and then it can generate power to drive the valve stem of the valve to operate. As the name suggests, electric is actually replacing this principle with a motor, so the pneumatic diaphragm valve saves electricity.

Let’s take a detailed look at the working principle of the pneumatic diaphragm valve. The device in it can compress the air, and then generate a certain power to drive the entire valve to operate. At the same time, it can also help the diaphragm inside to move up and down, so that the The switch can be opened and closed, so the tightness of the pneumatic diaphragm valve is very good, and the operation is very simple, and it does not need to be driven by current, so it saves some money for the factory. It is just that there are certain requirements for the working environment of the pneumatic diaphragm valve, and it cannot work in an ultra-high temperature environment, and generally the best liquids are water and gasoline. For some corrosive liquids, choose other valve devices.