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The high frequency, low amplitude motion produced by Derrick's complete line of vibrating motors produce a unique vertical-elliptical movement that quickly conveys oversize particles down the screen. This action produces a thin bed of particles, leading to increased capacity and efficiency. Single or multi-angle screen bed configurations are available, depending upon the separation goals and the amount of oversize and nearsize particles. If required, multiple cut points are easily obtained with various split hopper arrangements. Keep in mind that for high tonnage separations, it is usually more cost effective to use a combination of single and/or double deck Derrick screens than machines with three or more decks.
Derrick's worldwide dry screening success has also been driven by its continuing development of advanced, non-blinding, screen surface technology. For example, materials with high moisture content that would normally blind other types of equipment are successfully screened using Derrick's unique floating backing wire system.