The air from the compressor has to go through small holes in the valves before it gets to the thing that makes it work. If dirt or water get into compressed air, it can cause problems when it flows through machines. To keep the control system safe, a filter is used to remove dirty things from the compressed air before it goes in.
If you don't clean the compressed air, dirt and rust can get sucked into it and cause problems with valves that need to move smoothly. Also, the air that goes into the machine gets squeezed and made stronger, then comes out through a cooler and a tank to keep it stored. When it gets colder, the air can't hold as much water and the excess water falls as rain or snow. When air is compressed, it can become wet. Machines have a part called the after-cooler that removes most of the wetness. However, some parts of the machine still get wet and can rust and corrode. This can also remove the protective oil coating. Compressed air has bad oil mist in it which can stick to parts that move and mix with dirt. This makes a mucky buildup that stops the unit from working well.
Filters clean the air we use in machines to make sure they work properly. This helps the machines stay reliable. Usually in circuits that have valves and moving parts, there are filters that clean the fluid. These filters have two ways of cleaning: by spinning the fluid and catching particles. If you want to get rid of oil mist entirely, you should use an oil mist filter. To stop pollution, we need to use a special filter that removes oil mist caused by pollution from big engines. We can use a filter to remove bacteria and bad smells in medicine, food, and other special occasions.