Therefore, the following three operations are required before maintenance:
1. Before repairing, remove the pipeline pressure and make the valve open; 　　
2. Disconnect the power or air source before repairing; 　　
3. Before repair, the tissue shall be separated from the support. The pneumatic ball valve is rusted during use. Through metallographic structure analysis, dyeing test face, heat treatment test face, SEM and other experimental analysis, it is found that the key factor of material corrosion is due to the fact that the carbide along the grain boundary separates to form valves, gate valves, stop valves and ball valves in the chromium poor area. 　　
After the completion of the pneumatic ball valve equipment, start the pneumatic pipeline ball valve to open and close several times, which should be sensitive and evenly stressed, and the pneumatic pipeline ball valve should operate normally; According to the pipeline pressure planning requirements, the sealing function of the joint surface between the pneumatic pipeline ball valve and the pipeline flange shall be tested after the pressure is applied.

For the use of electric ball valve, it is the advantage of this point, which makes its own adaptability improved. Because when many convenient valves are used, their own installation space should also be limited. At this time, if it is other products, it can't be used, but because it is small in its own size, naturally, at this time, It will enable it to achieve the maximum advantage when using the product, so this is its own advantage.