... .6420×1250 QVC conveying system consist of material container, pipeline, vacuum con-veyor, control system and so on. ... process equipment and systems, include Tube Chain Conveyor ,Container Unloading System, Pneumatic Conveying System, Mechanical Coveying System, ... screw conveyor, drum dumper, bag packer, belt conveyor, container discharger, dosing and weighting system, Batch system, pneumatic conveying ...