Screw conveyors for screenings are used to transport waste from the screens and sieves. The screw conveyor transports the waste to the transport platform, container or conveyor system that takes the waste to storage or reprocessing. The screw spiral conveyor consists of a rotary spiral installed in a tube or channel. The spiral units are available with a central shaft or without one.

The capacity of the unit depends on the diameter of the spiral and the adjusted rotational speed. Conveyors are available in different lengths. Several screw spiral conveyors can be installed in series or in parallel in the same conveyor system.