When installing the busbar, if there are redundant air holes in the solenoid valve oil, what should be used to plug them?

Generally speaking, the air leakage of the solenoid valve is caused by poor sealing. This is the flaw of the domestic solenoid valve. You can open the solenoid valve to replace the sealing ring, but there may not be a matching one.

It also depends on where the air leaks, but generally speaking, the air leakage of the solenoid valve is caused by poor sealing. This is a flaw of the domestic solenoid valve. You can open the solenoid valve and replace the sealing ring, but It is unlikely that there will be a matching.

Another possibility is that the air intake joint is not screwed properly, and many people will misjudge this. If you can confirm that the cylinder is ok, you can remove the P-port joint, put some raw material belt on it and try again. Try (the cylinder can also be removed for testing, if any one of the two ends goes in, if there is no air leakage in the air hole at the other end, it means that it is not the problem of the cylinder, and the air intake at both ends should be tested)