1. To supply clean high pressured air for breathing apparatus cylinders.
2. Submerged Surface Divers can be supplied with clean moderate pressure air.
3. Pneumatic Tools use them to receive large amounts of moderate pressure air.
4. Pneumatic Tyres use compressors to fill them with air.
5. Industrial process uses like macroscopic (oxidation for petroleum coking) these require moderate pressure in large volumes.
Company Resource: Pneumatic component AC series Air treatment units, LAC series air treatment units
Read more: http://www.lidaqd.com/news/