Due to the characteristics of the materials of which they are made, these rollers are used in the transport of light and medium-heavy packages, in food, corrosive and humid environments.
In the PVC roller series (551.0 – 552.0 – 553.0) the tube is of special PVC, colour RAL 7011, made by extrusion of pure polyvinyl resin.The PVC tube is practically non-flammable, self-extinguishing and has excellent qualities of resistance to acids, bases, abrasion and impact.Upon request, the PVC tube can be supplied completely non-toxic for the food sector.In the PVC-Steel roller series (562.0 – 563.0) the tube is of steel, obtained from hot-rolled strip with natural or pickled surface, seamed externally.The steel types are Fe 370 and, on request, AISI 304.All tubes used by TECNORULLI have:
- reduced tolerances on the outer diameter and thickness;
- good rotundity;
- high level of straightness.