Donaldson Buran range of refrigeration-compressed air dryers

The Buran range of refrigeration-compressed air dryers is suitable for various industries including general manufacturing and processing, the food sector, pharmaceutical manufacturing and hospitals.

By refrigerating compressed air, the Buran dries the air to prevent condensation and corrosion damage. The dryers, in a robust metal housing, are equipped with electronic-level-controlled condensate drain and a dewpoint indicator.

An aluminium heat exchanger includes three functions in one: air-to-air heat exchanger, refrigerant-to-air heat exchanger, and water separator. Compressed air is fed into the dryer and is pre-cooled in the air-to-air heat exchanger where it is further cooled down to the required pressured dewpoint. Moisture in the compressed air condenses out and gathers and discharges automatically. The cold, discharged air is then reheated by the incoming compressed air. This saves energy and prevents any moisture forming beyond the dryer in the compressed air system. The cooling capacity of the refrigeration cycle is controlled by a hot gas bypass, which will assure secure functioning even during partial loading.

The heat exchanger concept means that pressure losses are reduced and the operating costs are kept low. The average pressure loss is 22% lower than with traditional dryer ranges.