If production processes require exact temperature control, the Ultracool chillers of Donaldson come into operation. They ensure that the necessary cool or process water always holds a constant temperature. Because the Ultracool range does not divert the heat in the process water over ventilators, but does so over a second water circulation, the operation is perfectly independent from the ambient temperature. With a convenient, easy to operate set-up program, the maximum and minimum values of the desired process water temperature can be entered; a large display respectively provides information on each relevant operating parameter.
Up to now the Ultracool range was available in eighteen different sizes ranging from a nominal cooling capacity of 1 to just under 200 kW. The program is now supplemented by the "Maxi" range, which is suitable for a cooling capacity of 300 to 500 kW.
The Ultracool Maxi chillers have two, respectively three cooling circuits and an integrated storage tank with 800 respectively 1000 l water capacity which serves as process tank. A pressure control device compensates for pressure fluctuations. The units are designed in such a way that the chillers operate within the energy-saving low pressure range.
Besides the accurate temperature control, water-cooled chillers are also characterised by the feature that they require less space for installation than air-cooled units. Furthermore they require less energy and operate with less noise than chillers with ventilator cooling. Since they do not require additional air and exhaust air ducts, they are also considerably easier to install.
Examples of application areas for the Ultracool range are amongst others digital printing machines, plastics machines, microprocessor manufacturing and - an obvious example - the production of ice-cream. The "Maxi" units with their high cooling performance are amongst others used for process cooling in the chemical industry.
Donaldson Company, Inc., headquartered in Minneapolis, is a leading worldwide provider of filtration systems and replacement parts. Founded in 1915, Donaldson is a technology-driven company committed to satisfying customer needs for filtration solutions through innovative research and development in high efficiency products and a distinct After Sales Service. Donaldson serves customers in the producing industrial markets, foodstuffs and pharmaceutical industries as well as automotive engineering and plant engineering and construction. Our 9,000 employees contribute to the company's success at over 30 manufacturing locations around the world. In fiscal year 2002/2003, Donaldson reported sales of more than $1.2 billion and achieved its 14th consecutive year of double-digit earnings growth. Donaldson is a member of the S&P MidCap 400 Index and Donaldson shares are traded on the New York Stock Exchange under the symbol DCI. Additional company information is available at www.donaldson.com.
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