Why is it necessary for compressed air to go through a drier?

The purpose of a drier in a compressed air system is to decrease the humidity of the air by lowering the dew point. Compressed air naturally contains moisture, which can lead to various issues when the air is used in applications such as pneumatic tools, painting, or any process where moisture can cause damage or affect performance. By reducing the humidity, the drier ensures that the compressed air is free of excess moisture, protecting tools and machinery from rust and corrosion and ensuring optimal performance.

Lowering the dew point is crucial because it determines the temperature at which moisture will condense from the air. The drier helps achieve a level of dryness that is suitable for reliable operation and minimizes the risk of water-related problems downstream in the air system.