Today, most industrial users of compressed air require of their air generating plant not only economic operation but also the reliable delivery of air to a specific standard of quality. To satisfy this demand, Kaeser have developed an air treatment system that can meet individual requirements of quality economically, consistently and with minimum maintenance effort.
A system for economic air treatment must include precleaning of the air drawn into the compressor package and for this function Kaeser screw compressors are equipped as standard with air filters and cooling air filter mats. This precleaning not only relieves the loading on downstream treatment devices, it also improves the reliability and service life of the compressors. The compressors themselves contribute to air cleaning as their cooling fluid tends to wash contaminants out of the air as it is compressed. Moreover, up to 90 percent of the moisture content of the inlet air is removed by the aftercoolers of these compressors. For the majority of compressed air applications moisture removal down to a pressure dewpoint of about +3° is sufficient, so refrigeration dryers are a standard component of treatment systems. In comparison with other dryers however, the KAESER refrigeration dryers of the SECOTEC series require less energy for the performance of this task. Their design creates a pressure drop of only 0.2 bar and the features of thermal mass and an on/off control system result in energy savings of up to 70 percent of the dryer's capacity at times when it is not needed. In cases where very low dewpoints of around -20° are demanded, considerable cost savings are possible by the application of modern drier systems. The Kaeser series DC heatless regenerated desiccant dryer, for instance, features a special controller that reduces the amount of purge air needed for regeneration to an absolute minimum, resulting in substantial energy savings and lowering of compressed air costs. For applications in which large volumes of very dry air are needed, Kaeser have developed the series DTL/DTW combined dryer system, which is an integrated combination of refrigeration dryer and heat regenerated desiccant dryer. The economical advantage of this is enormous, with savings of 50 percent or more of the power costs of a corresponding normal desiccant dryer. Kaeser membrane dryers are intended for treating fairly low volumes of air where a constant pressure dewpoint is not demanded or for further local drying of air supplied by a central refrigeration dryer. Their advantage lies in that they have no valves or moving parts and require no additional air for purging. They provide a reliable means of air drying without the need for an external energy source. The higher classes of air quality cannot be reached by drying alone and the comprehensive range of filters offered by Kaeser allows selection to exactly match any requirement even as demanding as 0.001 ppm remaining particle and oil content. A new addition to the range is the E-class filters fitted with an intelligent monitoring device that indicates not only the pressure drop and time in operation but also balances operating parameters to determine the economically optimum moment to change the filter element. They also feature the ECO-DRAIN to automatically remove collected condensate. The range of activated carbon adsorbers to remove hydrocarbons has been redesigned to double their previous capacity. | 
