The general working principle of silence muffler xy-15 for adsorption air dryers is simple. Moist air flows over hygroscopic material (typical materials used are silica gel, molecular sieves, and activated alumina) and becomes dry. When water vapor changes from moist compressed air into hygroscopic material or "desiccant," the desiccant becomes gradually saturated with adsorbed water.

Therefore, it's important to regenerate the desiccant regularly to regain its drying capacity. Silence muffler xy-15 for adsorption air dryers are typically built with two drying vessels for that purpose. The first vessel will dry the incoming compressed air while the second one regenerates (Similar to the workings of a nitrogen generator). Each vessel ("tower") switches tasks when the other tower is completely regenerated.

The typical pressure dew point (PDP) these dryers achieve is -40 °C, making them suitable for providing very dry air. There are 4 different ways to regenerate the desiccant, and the method used determines the type of silence muffler xy-15 for adsorption air dryer. More energy-efficient types are usually more complex and, consequently, more expensive to purchase.