Shaftless screw conveying
Shaftless screw transport
Spiral conveyors or shaftless screw conveyors
Spiral conveyors are developed and designed for efficient and effective transportation of a variety of materials such as wet, stringy or sticky materials. The main advantage of installing spiral conveyors is having maximum reliability and minimal maintenance.
Spirals have no shaft and this prevents material built up. Our fully sealed lids minimize odour nuisance. Rotations of the spiral are kept to a maximum of 30 rpm which results in low wear and abrasion due to the rotational speed.
The shaftless spiral is directly connected to the gearbox. This gives great advantages because the spiral is the only moving part which is in contact with the material.
Horizontal and inclined conveying
Dutch Spiral builds horizontal and inclined shaftless screw conveyors. Our inclined conveyors have a maximum inclination of 30 degrees. The design of transportation can be either pushing or pulling depending on the situation and the type of material.
Vertical shaftless screw conveying is also within our program. Our vertical conveyors have a special design and are specially made for inclinations of 30 to 90 degree.
The spirals weight is carried by a lining which covers the inside of the troughs. Depending on the type of transported material Dutch Spiral has range of different types of liners. This range has more than 15 different types from Ultra High Molecular Polyethylene with wear indication to high performance wear resistant steel. Our experts can help you chose the right material for the job.
Sizing and materials
We have over 800 different standard spirals changing the diameter and pitch to suit the application. This helps us to be flexible in making custom solutions, but also in replacing existing spare parts. Our standard spirals are made of a special hard wearing steel, but are also available in Stainless steel 304 and 316 variations.
Our troughs can be made out of Stainless steel 304 and 316, Carbon steel or Hot-Dipped Galvanized.
The benefits of Dutch Spiral's Shaftless Screw Conveyors
- Simple and robust design
- Fully sealed lids to minimize odour
- Space saving
- Shaftless spiral prevents material build-up
- Transports wet, stringy, sticky materials
- Low operating costs due to direct Drive with low power consumption
- Low wear and tear due to low rotational speed