there are water and some corrosive impurities like carbon-hydrogen, tiny dust and solid particles, and so on in the air. Passing through the filter on the compressor, those mixed air will input into air compressor to be compressed, which will reduce the quality of the compressor' lubricating oil and evaporate part of the oil to go into the air pipe. During the air compressing, with high temperature and oxidation, the mixed compressed air will be acidic with high corrosive capacity. If this mixture is input into the air pipe, it will rust the pipe and pneumatic component seriously to stop the production and reduce the finish bottle quality, raise the maintenance cost. In order ot avoid those, you need a high quality air filter to clear up those impurities out of the compressed air.
