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The UP-S and UP-EL profiles are available as standard in straight lengths of 3 and 6 meters (straight) or in rolls of 30 or 60 meters. The UP-HD profiles are standard and available in straight lengths of 3 or 6 meters.

Due to the many meters of belt, the varying product load and temperature variation, every spiral tower is equipped with a facility to compensate for belt length differences. This is often done by means of one or more tension loops where the belt can lengthen and shorten.

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