Rotary Air Locks, Hammermills, Sifters, Grinders, Air Classifiers, Ingredient Weighing Systems

Prater-Sterling classifier mills provide the best of both worlds of grinding and classifying particles with uniform distribution and simple maintenance.

Providing a uniform particle grind, Prater-Sterling’s durable hammermills can operate 24 hours a day and require very little maintenance.

Our fine grinders have the high capacity to reduce heat sensitive particles to 200 mesh and provide better dust control.

Prater-Sterling lump breakers reduce larger materials into smaller granules economically and simply. Ideal for cookies, detergents, sugar, minerals, fertilizer, etc.

In need of transforming scrap into reusable product? Our compactors reduce waste and compact particles to reduce density and volume.

Our airlocks can handle a range of high temperatures and pressure differentials to ensure the appropriate metering of your materials.

Prater-Sterling adjustable air classifiers are made in a variety of sizes and materials to service your dust-free material separation needs.

Our versatile sifters eliminate dust problems, self-clean and require no maintenance. Centrifugal sifters are ideal for sifting, scalping and classifying.

With one, two or three decks, our durable vibrating screens provide exact particles sizing and distribution smoothly, quietly and cost-effectively.

We offer diverse solutions for batching systems, weighing systems and process controls for dry & liquid materials (mechanical, pneumatic, grinding).

Our weighing systems provide efficient, accurate batching and weighing controls for hundreds of inventoried materials & thousands of stored formulas.

Our Human-Machine-Interface Control (HMI), Programmable Logic Controller (PLC) & Motor Control Centers (MCC) provide custom system integrations.