Screw and spiral shaftless conveyors are mainly used to reduce the dustiness of the working environment for loose materials and bulk materials. The material is transported horizontally or obliquely upwards.

The most common types are tubular or U-profile screw conveyors that may or may not be covered from the top, and this is always a custom piece production. VVV MOST spol. s r.o. also carries out repairs and renovations of various types of screw conveyors.

The most commonly used material is the stainless steel, the HARDOX (abrasion-resistant) material is welded to the inside frame. It is also used with special ceramic lagging or protective coatings. Another alternative to screw conveyors with a solid axis is the non-axial spiral conveyors that allow curvature and bending when transporting the material.

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