In pneumatic systems, compressors draw in ambient air that forever contains some quantity of water vapor. The process of compressing air to around 100 psi raises the air’s temperature, but also dew tip and water-holding capacity. Any succeeding cooling downstream will probably cause some water vapor to condense, Liquid water in pneumatic systems creates problems such as decay and bacteria growth, which, in turn, leads to lethargic controls or component breakdowns. Therefore, Air Dryer is often needed to mitigate water issues.
In a typical system, air flows from the compressor to an aftercooler that lowers the temperature, causes compression, and get rid of the majority of the water. Sometimes coalescing filters are installed to get rid of additional water. But if a circuit requires further treatment, Air Dryer is a must. They remove most or all of the water in compressed air sooner than it reaches critical components or processes.