Fine particle separation below 75 microns with high throughput and optimal yield.

Air Classifier System

Air Classification Services

Do you need a tighter particle size distribution? Or remove Coarse or Fine particles?

The AVEKA Centrigual Air Classifier is designed to separate fine particles in the less than 75 micron range.

This is achieved by utilizing the opposing centrifugal force and aerodynamic drag to sort the particles by mass, resulting in coarse and fine particle fractions.

The Classifier is able to achieve a precise, predictable, and extremely sharp separation at a high solids loading.


AVEKA’s Classifier uses the space between the outer edge of the blades and the periphery of the rotor as the classification zone.

The coarse particle fraction is rejected outward by the centrifugal blades and is conveyed out of the Classifer through the coarse outlet and captured in a cyclone. The cyclone overflow is returned to the Classifier through the recycle port.

The fine particle fraction leaves the Classifier with the primary air flow through the central fines outlet.

A typical system includes the Classifier assembly, flow source, coarse and fine fraction collectors, feed system, and controls. Component selection and design are application-specific to meet your requirements.

AVEKA has laboratory, pilot, and production scale equipment facilities for testing, equipment evaluation, and custom processing.

Give us a call to help you decide whether an air classifier is the right tool for your product.

Contact Us

  • Max. file size: 100 MB.
Capabilities and Equipment Specs

Air Classification Tolling/Test Equipment installed at AVEKA:

  • Three Model 250 High-Efficiency Centrifugal Air Classifiers
  • One Model 100 High-Efficiency Centrifugal Air Classifier
    • Lab-scale machine for running small quantity feasibility tests for jet milling and/or air classification

Tolling/Test Run Guidelines:

Model No. 100 250
Minimum run quantity* 200 g 10 kg
Preferred run quantity* 500 – 5000 g 225 – 450+ kg
Typical throughput** 100 – 400 g/hr. 45 – 180 kg/hr.


* For test runs on equipment installed at AVEKA
** Rates are dependent on materials and conditions

Wear resistant coatings

  • Classifier rotor plasma-coated with tungsten carbide
  • Stator ring lined with tungsten carbide
Factors to Consider
  • What is the particle size of the feed material?
  • What is the target particle size?
  • Is the material a combustible powder?
  • Is the material abrasive?