(1) Preparation before installation
Installation method of pneumatic ball valve The front and rear pipelines of pneumatic ball valve shall be prepared. The front and rear pipes shall be coaxial, and the sealing surfaces of the two flanges shall be parallel. The pipeline shall be able to bear the weight of pneumatic ball valve, otherwise the pipeline r must be equipped with proper support.
② Purge the pipelines before and after the valve to remove oil, welding slag and all other impurities in the pipeline.
③ Check the mark of the pneumatic ball valve and make sure that the ball valve is intact. Open and close the valve barrier several times to verify its normal operation.
④ Remove the protective part on the connecting flange at one end of the left pneumatic ball valve.
⑤ Check the valve hole, remove the possible dirt, and then clean the hole. Even if there are only small particles between the valve seat and the ball, the sealing surface of the valve may be damaged.

Troubleshooting of leakage at both ends of pneumatic butterfly valve
1. Sealing gaskets on both sides fail
2. The tightening force of pipe flange is uneven or not compacted
3. The upper and lower sealing gaskets of the sealing ring are invalid