As one of the world’s leading manufacturers of compressed air purification equipment, Donaldson has built a comprehensive engineering, manufacturing, and customer support network to meet the most demanding applications. With over 30 years of expertise in compressed air filtration and separation technologies, Donaldson manufactures a complete line of drying and filtration equipment using innovative designs that focus on energy efficient operation and reliable performance. Our refrigerated dryer offering is split into two distinct ranges: Donaldson offers a cycling and a non-cycling range of refrigerated dryers to meet all application requirements.