Van Tongeren Harnesses Gravitational, Inertial, Centrifugal and Aerodynamic Forces

SOURCE: Van Tongeren | April 30, 2019

Lebanon, PA, USA: Process equipment manufacturer Van Tongeren America, Lebanon, Pa. has unveiled a Dual Classification System that automatically separates dry materials at two cut points. A clever upgrade from classifiers limited to a single cut point, the Dual Classification System enables processors to separate feed materials into three different product streams instead of just two product streams to meet gradation specifications for multiple products and help convert material discarded as waste into saleable product. Devised for classifying cement, limestone, asphalt sand, filter sand and other aggregates, the Dual Classification System integrates the company’s Gravitational-Inertial Classifier (GIC) with its Centrifugal Classifier (CC) to separate the feed material at any cut point from 300 μm to 63 μm (50 to 230 mesh) during the initial pass then at any cut point between 100 μm to 15 μm (950 to 150 mesh), all with a uniform distribution.

The pneumatic classification system features a proprietary design that harnesses gravitational, inertial, aerodynamic and centrifugal forces to automatically separate the dry particles without using water and without any moving parts. The classifier forms the feed material into a falling curtain and directs it into the GIC. Particles that meet the first gradation specification are removed and the rest enter the CC. Materials that meet the second gradation specification are removed and the rest directed onto a conveyor or into a cyclone as appropriate for the process.

The Dual Classification System is custom-designed and manufactured for each installation to meet target production goals and material specifications. The system is proven to perform continuously in unattended, 24/7 operation.

For a free brochure or more information, contact Van Tongeren America, LLC, 518 South 8th St., Lebanon, PA 17042; 717-450-3835,

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The original company was formed in 1971 as Van Tongeren (UK) Limited, a subsidiary of Van Tongeren Holland to provide direct Van Tongeren technology to the United Kingdom.

Van Tongeren first started in Holland in 1927 introducing a greatly improved type of cyclone far superior in efficiency to the generally available designs at that time. Over the years, Van Tongeren technology became acknowledged throughout the industrial world as a leading authority on cyclone design and many current designs are freely based on the original Van Tongeren concept.

Due to changes in the structure of Bureau Van Tongeren in Holland in the early 1970’s Van Tongeren (UK) Limited became deeply involved in the international market worldwide and was responsible for the further development and exploitation of Van Tongeren technology including the updating of original data. In 1983 the name of Van Tongeren (UK) Limited was changed to Van Tongeren International Limited to acknowledge the truly international trading of the British company.

Further changes in the Bureau Van Tongeren organization at the end of 1986 resulted in the acquisition of 75 percent of the shareholding by British shareholders and directors early in 1987 and the following year 1988 the remainder of the shares were acquired by the British shareholders.

Since 1988 Van Tongeren International has been a wholly owned British company and a natural successor to the original Bureau Van Tongeren maintaining and developing cyclone technology and the application of cyclones in industry to very high standards required for current processes.

More recently (April 2016), Van Tongeren International Limited purchased NextGen Cyclones LLC to form +Van Tongeren America LLC.  The new company will market, design and subcontract fabrication of FCC cyclones and classifiers to the USA and Canada. The Van Tongeren America company has a combined experience of over 100 years in FCC cyclone design and supply with one of Van Tongeren International’s former licensees. Their experience encompasses all major licensors and oil companies in both the US and abroad.  The classifier, industrial cyclone, and bag filter product lines will be available worldwide through the Van Tongeren