High Efficiency Classifier
Like a classifier. Unlike any classifier.
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The SHR is the latest generation of our High Efficiency Dynamic Classifier. Our new SHR is used to classify a large range of particles (d98 from 5 to 1000 microns) at a high level of efficiency.

This Classifier which is fed by gravity discharge is particularly suited to high throughput rates up to several hundred tons per hour.

The SHR is fitted with our patented air seal SEALMAX which allows a very sharp top cut even for very high fineness. The SHR is able to reach high fineness up to D98 5 microns depending on the product. It has been designed to be coupled with every type of mill.

In order to improve the yield of this type of separator, POITTEMILL has designed an original system of air purge that extends the time the product remains in the selection zone.

With this solution, the recycling becomes external and the recycling of the installation is now meazurable and visible. We can optimize all the classification process: flowrates optimization, vibration optimization, grading curve optimization and even specific consumption (kWh / T of production).

Thoughput up to
tons per hour.
Cut off down to
Accept input product up to
Vield up to


The product to be treated is fed into the top part of the separator and distributed onto a spreader plate that is fitted onto the rotor. The product falls into the selection zone where each particle is subjected to the combined actions of centrifugal force, circulation and gravity. The fine particles pass over the rotor blades whilst the slower over-sized particles are rejected through an air-tight rotary valve. The finished product (fine fraction) is collected in a duct at the base of the rotor and evacuated to a collecting system by pneumatic transport.

Advantages and benefits
Why to invest on our High Efficiency Classifier ?
Oversized load control
The waste product is now measurable and analyzable because it gets out of the classifier.
High fineness capacity
Down to 98% < 5µm
Easy control of finished product particle size
Compact Equipment
The combination of guiding vanes with a dynamic radial turbine
Easy to use and to maintain
Easy to operate
Performance improvement of associated grinding line
Up to 30% only by adding the classifier.