Air classifying of dry powders

Due to their particle size distribution, some processed products still do not meet application requirements. Fine fractions or oversized particles interfere with further processing or make the final product unsuitable for the targeted application. 
Such products require additional "optimisation" to meet the desired particle size distribution necessary to improve the product's characteristics. Customarily products with a particle size range of >100 µm can be classified without difficulty using a screening machine, however, air classifiers are essential for finer particle size distributions that require a more controlled separation.

Typical applications for our fine classifiers are the separation of undesired coarse grains and the distinct reduction of fines (de-dusting).

Different machine designs are available, depending on the desired cut points or application. Machine sizes are available for nearly all ranges of capacity. We carry out the project planning, production and commissioning of individual machines as well as complete classifying plants.


CFS Ultra-Fine Classifier
CFS Ultra-Fine Classifier

When a screening machine cannot be used, due to its separation limitations:

With our „standard“ ultra-fine classifier, CFS, fine powders can be cleanly classified. High performance classification and efficient results are valid for both coarse material and the separation of fines.

Available for finenesses from 10 to 250 µm (d97).

Machine sizes available for gas volume from approximately 50 to 16.000 Nm³/h.

CFS/HD-S High-efficiency Fine Classifier
CFS/HD-S High-efficiency Fine Classifier

The requirements of many product applications such as improved separation sharpness and finer cut points, are no problem for the CFS/HD-S range of High-efficiency Fine Classifiers.

Thanks to the maximum predispersion of the product to be classified, the targeted cut point and sharpness of cut can be optimized distinctly.

Available for finenesses from 2.5 to 60 µm (d97).

Machine sizes available for gas volume from approximately 50 to 16.000 Nm³/h.

InlineStar High-performance Fine Classifier
InlineStar High-performance Fine Classifier

This newest fine classifier was conceived to combine with an upstream mill. The direct integration of the InlineStar classifier behind a mill creates a continuous grinding/classifying plant that reduces the number of required plant components.

Available for separation limits from 2.5 to 60 µm (d97).

Machine sizes available for gas volume from approximately 350 to 2.600 Nm³/h.


Laboratory Machines

CFS 5 and CFS 8 Fine Classifiers
CFS 5 and CFS 8 Fine Classifiers

Efficient separation of grain sizes and effective results for both coarse material and fine material separation.

For separation limits from 10 to 250 µm (d97).

Machine sizes with gas volume of approximately 25 to 145 Nm³/h.

CFS 5 HD-S and CFS 8 HD-S High-efficiency Fine Classifiers
CFS 5 HD-S and CFS 8 HD-S High-efficiency Fine Classifiers

The smallest for the finest – exact separation results for superfine powder through best possible product classification with the sharpest separation and maximum gains.

For separation limits from 2.5 to 60 µm (d97).

Machine sizes with gas volume of approximately 25 to 145 Nm³/h.