Radial fans provide the necessary negative pressure which is needed for creating the conveying current. The fans can either convey the aspired material directly (transport fans) or be positioned on the clean air side behind the separator systems (clean air fans). Injector systems are used for specific applications such as conveyance of trim and granules.
However production waste is often generated in sizes that do not permit reliable, economic extracting. Therefore the suctioning process is preceeded by a shredding system (shredding fans, cutters, cutting mills, single and multi-stage macerators, granulators).