For over 90 years, Prater has provided reliable particle processing solutions to businesses of all sizes. Our extensive array of equipment and systems serve your dry processing, powder, and bulk solids applications easily and efficiently. We offer many expertly designed systems and lines of industrial processing equipment to ensure that you receive the best possible results of your process time and time again. Each high-quality product that we develop is intended to serve each industry differently and uniquely to provide the desired outcome of each processing application.

Air Classifiers

Air classifiers use centrifugal force and an adjustable vortex to achieve finer separations and narrower size distributions, including options like the “Mini-Split” for small-scale applications.

Air Classifying Mills

Prater’s air classifying mills combine two-stage grinding with internal air classification, offering superior ultra-fine micronization and handling challenging products with ultra-narrow particle distributions.

Fine Grinders

Ideal for grinding dry, free-flowing, or heat-sensitive materials to 325 mesh, it features precise blade-to-screen tolerance for narrow particle distribution, with a cantilevered rotor and outboard spindle that improve reliability and reduce maintenance.

Hammer Mills

The Full-Screen Hammer Mill is perfect for high-capacity grinding to 35 mesh, while the rugged, dust-tight Mega Mill suits pneumatic systems.

Lump Breakers

A compact and economical machine, it gently pulverizes agglomerated or densified material with lumps up to 8 inches, improving flow characteristics and enhancing downstream blending and drying processes.

Rotary Airlock Valves

Our rotary airlocks feature standard 8-blade rotors with precision machining to reduce air loss, oversized inlet throats, and rotor pockets for maximum displacement. Optional features include air-purged seals, replaceable rotor tips, and various wear coatings.

Rotary Sifters

This machine delivers high-capacity sifting and scalping well above conventional sifters of similar size. Adjustable paddles and flexible mesh reduce binding in high-fat/oil materials, while a three-bearing design ensures smooth, vibration-free operation and durability.

Rotormill

The IPEC Rotormill uses a “Long Gap Mill” concept with a lengthy annular gap path, where grinding occurs through particle-on-particle collisions driven by extreme turbulence.

Rotordryer^®