Particle Sizing and Separation Solutions

Process dry materials to exceptional fineness and uniformity over an extensive array of feed variations.

Prater offers a wide range of sizing and separation solutions based on customers’ needs. We focus on vibratory (deck) screeners, rotary (centrifugal) sifters, and air classifiers.

Prater Particle Sizing & Separation Products

Rotary Sifter

Rotary Sifters

High capacity sifting and scalping at rates many times greater than conventional sifters with a similar screen area. The unique centrifugal force imparted by adjustable paddles, in combination with flexible mesh fabrics, greatly reduces binding problems when handling materials containing high fats/oils. A three-bearing design ensures smooth, vibration-free operation and long life.

Mini Sifter

Mini Sifter

Our mini-sifter is an easily assembled and disassembled rotary sifter that is completely versatile and vibration-free. It’s high throughput, safety interlocked features and heavy-duty design make the mini-sifter flexible enough for lab applications and rugged enough to meet small production requirements.

vibrating screen

Vibratory Screens

The Prater Vibratory Screener is a heavy-duty, mechanical machine that separates particles into multiple size fractions, removes oversized particles or foreign material, removes fines from a process stream,  or segregates excess liquid from finished products.


Mac Air Classifier

The MAC forced vortex units process dry materials to an unmatched fineness and uniformity over a wide range of feed variations, either in closed-circuit with a conventional milling system or as independent “stand-alone” systems that incorporate feeder, fan and product collection equipment.

mini split air classifier

Minisplit Air Classifier

The Mini-split Air Classifiers were primarily developed for research “semi-tech” and small-scale production applications. An ideal choice for small workspaces, its low-noise capabilities reduce distractions while its compact size ensures efficient portability.

Prater Sizing & Separation Case Studies

Need Help Finding Your Solution?

Learn More About Particle Sizing & Separation Products from Prater Industries

For applications that require sifting, scalping, screening, and/or classifying, explore Prater’s rotary sifters, vibratory screeners and air classifiers to find the ideal product customized to your exact specifications. Our MAC Air Classifier is highly efficient and equipped with an external fines collector. Renowned for its high capacity abilities, low power consumption, and self-cleaning capabilities make this an ideal air classifier for sticky products. These units process dry materials to exceptional fineness and uniformity over an extensive array of feed variations, either in closed-circuit with a conventional milling system or as an independent, “stand-alone” system incorporating feeder, fan and product collection equipment in one unit.

Prater’s rotary sifters are available in several models, including centrifugal sifters and mini-sifters. Offering more throughput capacity per screen area than conventional screening equipment, our rotary sifters’ maintenance-friendly design allows for easy access to the sieve chamber and other internal working parts. Changing or replacing screens takes only minutes and no tools are required for screen-frame assembly changes.

No matter what your particle sizing and separation needs may be, over 6,000 customers around the world have trusted Prater’s powder and bulk material processing equipment, including our air classifiers, rotary (centrifugal) sifters and more, to efficiently meet their operational goals.

Read Less...