Are all carry and return rollers on conveyers solid rollers or slides rather than hollow tube rollers?
Hollow rollers have end caps that will allow moisture to get into the interior. Logic tells us that if it can get in, it can get out again and will contaminate the belt that it is rolling on. Photo 21 is telling, showing an example of the type of debris that can accumulate in a hollow roller and why it is important to require solid rollers or slides for belt returns. Conveyor belts should also be hygienically designed for greater assurance of cleanability. Many belting manufacturers have introduced innovative conveyor belts that have a basis in sanitary design. These types of spiral, turn curving or other belting (Photo 22a-c) feature open-module designs or double slotted links, which allow for maximum airflow and cleanability. An open design permits improved access to the rods to flush out soils and chemical residues. 10. Is the piping system free of deadlegs greater than two pipe diameters? These (Photo 23) can be deadly, pun intended. According to information published by Unilever,
