Compressed air is involved in our life for many ways. compressed air is also used in everything.
What is compressed air used for?
In the industry, compressed air is used in two ways: as energy and as part of a process. These two types are referred to as Energy Air and Active Air respectively.
First of all, Energy Air is used for storing and transmitting energy in order to do mechanical work. More specifically, it is used to power pneumatic production equipment, air operated lathe chucks, pressure clean parts and to convey or cool components during production.
Active air, on the other hand, is required as an active and integral part of a certain process. In this case, the air comes in contact with the product therefore the air quality is very important. The clean, dry air quality, or CDA quality for short, can be enhanced by utilizing oil-free compressors and by treating the air using one of the many quality air tools available. This type of compressed air is used in the following industries:
Chemicals
Pharmaceuticals 
Food & Beverage 
Semiconductor & Electronics 
Medical Breathing Air