Tomal metering systems are widely used for reliable emptying and metering of solid components in many kinds of mixing processes. They are designed for high accuracy volumentric discharge of solids with differing characteristics and when combined with an appropriate weighing system can be used for continuous or batch processes.
Each Tomal unit incorporates a pair of variable-pitch metering screws which are horizontally opposed to provide forced emptying and high delivery accuracy and whose self-cleaning action ensures reliable silo emptying. A filling detector in the rear part of the screw indicates the presence of arches in the feed material. To prevent archbuilding problems and to restrict the size of the discharge screws, arch-breaking devices are incorporated.
An advantage of the Tomal multi-screw design is a linear discharge characteristic. For materials with constant density, the discharge accuracy is better than 1%, making the unit suitable for both continuous and batch processes.
Bran + Luebbe
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Further information cpp-229
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