Air dryers are vital components within the compressed air systems of medium and heavy-duty vehicles like trucks and buses. Their primary function is to eliminate moisture, oil, and other contaminants from the air, guaranteeing the reliability and safety of the air brake system. By removing these impurities, air dryers prevent potential damage to various components of the braking system, such as valves and cylinders, that could result from moisture or oil infiltration. This ensures consistent and efficient brake performance, reducing the risk of brake failure and maintaining the overall safety of the vehicle and its occupants.