Plastic diaphragm valve is a special form of cut-off valve, which is mainly composed of valve body, diaphragm, valve disc, air chamber and other components. Its notable feature is its stuffing-box-less structure, which uses a rubber diaphragm to completely isolate the corrosive medium in the flow channel from all driving components, thereby avoiding common problems such as "run, pop, drip, and leak" with traditional valves.

Since the rubber diaphragm of plastic diaphragm valves has certain corrosion resistance, it is usually promoted and applied as a corrosion-resistant material. In addition, the flow path is simple, has a "self-cleaning" effect, and is suitable for conveying and intercepting dirty media, and regulating flow.

Specifically, the advantages of plastic diaphragm valves are as follows:

1. No packing, no leakage: Since the plastic diaphragm is used as a seal, there will be no leakage problems caused by aging or wear of the packing in traditional valves. This makes the pneumatic plastic diaphragm valve have better safety and reliability when transporting some toxic, harmful, volatile, and flammable media.

2. Good cutting effect and strong circulation capacity: The flexibility of the plastic diaphragm allows the valve to easily cut off various fibrous substances and impurities to ensure the smooth flow of the pipeline. At the same time, the flow capacity of the pneumatic plastic diaphragm valve is also well controlled and can maintain good flow performance under different working pressures.

3. Simple control, small driving torque, fast switching, and easy automatic control: the pneumatic control system can easily open and close the valve, and the driving torque required by this control system is small, making the operation easier. At the same time, automated control can also achieve remote control and monitoring, improving valve control efficiency and reliability.

Please note that when transporting viscous or crystallizing media, diaphragms with scrapers or breakers should be selected to avoid crystallization or clogging of the media in the valve. When transporting high-viscosity media, valves with larger flow capacity should be selected. In addition, when transporting corrosive media, valves made of plastic materials with corrosion resistance should be selected.

In general, the plastic diaphragm valve is a valve with a unique structure and working principle. It has the advantages of no packing, no leakage, good cutting effect, strong flow capacity, simple control, small driving torque, rapid switching, and easy automatic control. .