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Conveying process often requires also cooling or heating of the treated mate­rials at the same time. PURATEK-exchange® unit is a conveyor with jacket, shaft and spiral cooling or heating. Espe­cially desi­gned for heavy-duty applications.

The performance-optimized cooled or heated screw unit, convinces with a high heat transfer coef­fi­cient, at simul­ta­ne­ously large conveying rate. These proper­ties are achieved by opti­miz­a­tion of conveyor screw unit geometry, maxi­mi­zing avail­able thermal exchange surface.

The cooling/heating medium is guided in precisely defined and flow-optimized chan­nels. The cooling or heating medium flows through the conveyor/mixer jacket, screw shaft and screw blades. A wide variety of cooling and heating media can be used: water, steam, thermo-oil, Glysantin® mixture, etc.

When designing PURATEK-exchange® unit, the most advanced calcu­la­tion methods are employed. This is advan­tage, espe­cially when the cooling or heating screw must operate in narrow range limits, such as a small tempe­ra­ture diffe­rence between the cooled and heated medium.

For corro­sive, chemi­cally aggres­sive and extre­mely abra­sive mate­rials to be conveyed and cooled or heated at the same time, special construc­tion mate­rials are used. PURATEK-exchange® unit is thereof mostly manu­fac­tured from high-quality stain­less steel up to Duplex steel.