The pneumatic wafer type butterfly valve has a novel structure. The valve body structure is a short distance wafer type structure formed to meet the narrow pipeline space, with zero external leakage and internal leakage in line with national standards.

Troubleshooting of leakage on sealing surface of pneumatic butterfly valve
1. There are sundries on the butterfly plate and sealing surface
2. The closed positions of butterfly plate and sealing surface are not aligned
3. The stress on the bolts of the flange installed at the outlet side is uneven