U-trough screw conveyor for mineral wool

U-trough screw conveyor for transporting mineral wool. The screw conveyor is manufactured for a heavy-duty environment. The screw conveyor has a high inclination. In this case BEMA has manufactured tube shaped lids for the screw conveyor, which means that it has the same functionality compared to a tubular conveyor. The screw rotor is supplied with wear flight segments. Due to the length the U-trough is manufactured with a double formed flange. See another example of a U-throgh screw conveyor

What is the function of wear screw flights used in a U-trough screw conveyor?

1. Read about wear screw flights here
2. The screw rotor always transport material on the outer diameter
3. Above to the upper statement, the wear will always take place on the wear flight
4. When the wear flight is warn out, the wear screw flights can be changed to new ones
5. The wear screw flights are tag welded to the base screw flight for easy installation

A U-trough screw conveyor is very suitable for transporting bulk heavy duty material such as:

1. Mineral waste
2. Stone
3. Ash and slags
4. Gravel in all different sizes
5. Wood chips and wood pellets

What filling degree can you have in U-trough conveyor?

• In BEMA we recommend a standard filling degree of not more than 30%
• For light flowing materials you can increase the filling degree up to 45%
• If the material is abrasive  like ash and slags the filling degree shall be as low as 10%

In BEMA we have our own design department with engineers and technicians who can assist in defining the correct size for your U-trough screw conveyor.

FAQ – U‑trough Screw Conveyor for Mineral Wool Waste

1. What is a U‑trough screw conveyor used for in heavy‑duty applications

A U‑trough screw conveyor is designed for transporting bulk materials such as mineral wool waste, stone, ash, slags, gravel and wood‑based products. It is built for demanding environments and can operate at high inclinations, making it suitable for installations where space or layout requires steep conveying angles.

2. Why are wear screw flights important in a U‑trough conveyor

Wear screw flights protect the base flight from abrasion. Since material always moves along the outer diameter of the screw, wear occurs on the replaceable wear segments. These segments are tag‑welded for easy installation and can be replaced when worn, extending the lifetime of the screw rotor and reducing maintenance costs.

3. What filling degree is recommended for U‑trough conveyors

BEMA recommends a standard filling degree of up to 30%. For light‑flowing materials, it can be increased to 45%, while highly abrasive materials such as ash and slags should be kept as low as 10% to minimize wear and maintain stable operation.

4. How does BEMA ensure correct sizing of a U‑trough screw conveyor

BEMA’s in‑house engineering team assists with defining the correct conveyor size based on material characteristics, capacity requirements and installation conditions. This ensures optimal performance, long service life and reliable operation in heavy‑duty environments.