The pneumatic drive type butterfly valve is a very important type in the cast iron butterfly valve. And it has a simple structure, small size, and light weight, and it is composed of only a few parts. And what you should do is only to rotate 90 degree to open and close quickly, because it is easy to operate, at the same time the valve has good fluid control characteristics.
When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has better flow control characteristics.
Pneumatic drive type butterfly valve has two types of seals: elastic seal and metal seal. Elastic sealing valve, sealing ring can be mounted on the valve body or attached around the butterfly plate.
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