HEIN, LEHMANN US is proud to offer you the ultimate in screening technology, the LIWELL® Screening Machine. With more than 3500 machines in operation worldwide, the LIWELL® operates on the "Flip-Flow" principle, under which elastic polyurethane screen mats are alternately tensioned and relaxed, resulting in acceleration forces on the screen mats of up to 50 G’s, with minimal force on the support structure. The screen deck operates free from pegging and blinding, the end result is the effective screening of sticky, moist, and abrasive materials, at cut points as low as 50 mesh.