How can there be water in the cylinder of pneumatic control valve driven by instrument wind?

There are several possibilities. When the compressed air from 1 air compressor passes through the cold dryer, the water is not completely separated and brought into the pipeline. 2. The filtration pressure reducing valve of the pipeline is too poor to filter water, generally 40μm is enough. If there is too much water, consider using 5 μ m; 3. The filter element of the filter pressure reducing valve is damaged. Replace the filter element. These are basically the reasons. You can check it. There is something wrong with the cold dryer, too. In this case, it is necessary to replace the cold dryer, and then see if the filter in the cold dryer is broken.