EASE OF USE Large, quick opening access doors allow for inspection and fast changing of screen assemblies. Disassembly and screen changes can be accomplished without the use of any tools. Totally enclosed Centrifugal Sifter eliminates dust problems. Unit operates quietly, with no motion or vibration to surrounding structures. Access doors provide easy access to sieve chamber and to all internal working parts. Discharge hopper can be designed to discharge into a number of process machines.