What are the advantages of pneumatic diaphragm valves?

Pneumatic diaphragm valves have two main advantages: one is that the valve does not require a separate stem packing seal structure, the diaphragm plays a role of sealing the stem while cutting off the medium, and the other is that the flexible diaphragm closes reliably , Even the dirty liquid can be cut off well. Therefore, the operating mechanism and the medium channel are completely separated, so that the pneumatic diaphragm valve is not only suitable for the food industry and the medical and health industry, but also suitable for some difficult-to-transport media and more dangerous media