Working principle of pneumatic butterfly valve:?
The pneumatic butterfly valve uses a round butterfly plate rotating with the valve head for opening and closing, so as to realize the starting action. The pneumatic valve is mainly used as a block valve, and can also be designed to have the function of regulating or section valve and regulating. At present, butterfly valves are increasingly used in low-pressure large and medium diameter pipelines.???

3、 Inspection of pneumatic ball valve after installation
After installation, start the ball valve to open and close several times, which should be flexible, evenly stressed, and work normally.
According to the pipeline pressure design requirements, the sealing performance of the joint surface between the ball valve and the pipeline flange shall be tested after the pressure is applied.