Pneumatic ventilation butterfly valve, characterized by a slit between the valve plate and valve seat, is suitable for use in the environment with poor air circulation.

Precautions for pneumatic butterfly valve device
1. When selecting, in order to facilitate the device, please select loose flange pneumatic butterfly valve at one end as far as possible.
2. When the electric welding operation is stopped at the construction site, the appearance of the pneumatic butterfly valve shall be maintained to prevent welding slag and arc striking from burning the pneumatic butterfly valve.
3. Pneumatic butterfly valve twisting device is strictly prohibited.
4. It shall not bend along the root of pneumatic butterfly valve, and there shall be no dead bend.
5. The medium shall not be corrosive to the bellows data, and the chloride ion content in the medium shall be ≤ 25PPM
6. Rigidity device is shown in the figure of correct installation mode.
7. Do not damage the flange sealing surface mechanically.