The Powerscreen^® Chieftain 2100X is available with a 2 deck version of the Bivitec screen for applications where feed materials that clog the screen openings of conventional machines. The Chieftain 2100X BIVITEC has 3 movements taking place providing the powerful screening actions required for these difficult materials. The entire screenbox moves in the same circular motion as other Powerscreen® incline screens whilst each of the 2 individual screen decks resonate causing the flexible polyurethane screen mats to continually tension and un-tension to eliminate material binding.