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particle size reduction, feeding & separation

Prater builds a wide range of equipment for particle size reduction, feeding and separation,  designed to provide years of low-maintenance, reliable service.

Apart from equipment such as lump breakers, hammer mills, fine grinders, air classifying mills, rotary sifters, air classifiers, rotary airlock valve feeders, Prater also offers highly skilled and experienced technical services on-site for start-up, troubleshooting, and preventative maintenance.

Bakery Products
Pet Food
Wood Processing
  • Texas
  • Louisiana
  • Oklahoma
  • S. Mississippi

Expertly designed powder & bulk solids processing systems.

Prater’s incredibly versatile equipment & systems are used across many industries. With such a diverse selection of solutions, major companies such as Keebler, Kraft, as well as Abbott and Pfizer, trust their customized Prater systems and depend on them.

With over 6,000 customers around the world, Prater offers only the most carefully designed and manufactured material processing equipment and systems customizable for any company’s requirement.



Highly precise method for separating and classifying particles to the desired size and density.

Rotary Valves

Designed to provide improved performance to bulk material processing and production operations.

Lump Breakers

Lump breakers (flake breakers) are required particle size reduction equipment for most material handling systems.

Rotary Sifters

Sift, scalp and classifying of a wide variety of particles and products, including agglomerated materials.


More capacity, better dust control, simple maintenance, and precise control of particle size and distribution.


BLUE STREAK, Vintage 1930's, Hammer Mill Sales Manual, Prater Pulverizer Co.Founded in 1925 by Ralph Prater, Prater Industries (then known as the Prater Pulverizing Company) began by designing and manufacturing hammermills for the growing feed industry. The company continued as a family-run business for decades.

As new opportunities presented themselves, Prater’s entrepreneurial spirit kicked in to produce a wide variety of novel product and application solutions, including lump/cake/flake breakers, hammermills, fine grinders, air classifying mills, deck screeners, rotary sifters, and air classifiers as well as a full line of rotary airlock valves.

Today, Prater Industries operates under the IMI Holding Corporation umbrella and continues to thrive by providing ingenious and creative solutions for a wide variety of industrial applications. They develop and provide innovative, tailored material size reduction, separation, and process solutions.

View of the ‘Blue Streak’ Hammer Mill – Alexander’s Grist Mill’s first electric powered machinery added in the early 1930s, used to pulverize oats, alfalfa, and corn.

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