Inclined tubular screw conveyors for premix

Inlcined tubular screw conveyors for premix manufactured for transporting building material in a concrete factory.

What are the design parameters for inclined screw conveyors above 45°

1. Housing in general be tubular to reduce the backflow of material
2. The pitch of the screw flight must be reduced compared to a horizontal screw conveyor
3. The power of the gear box shall be increased to compensate for the vertical transport

In this case, the customer asked for long life screw conveyors with a minimum of maintenance. See another example of inclined tubular conveyors

What design features have BEMA included to increase the life time?

1. Self carried inner tube of the screw rotors
2. Thickness of  the screw flights have been increased
3. Pack boxes with braided packings in drive and following end
4. High quality bearing in drive- and following end of the screw conveyors
5. High quality gear boxes applied for all tubular screw conveyors

All screw conveyors have been delivered with clamps for easy access points for carrying steel structure on-site. BEMA always offer our customer steel elements to reduce the installation of screw conveyors on-site.

How do BEMA treat screw conveyor projects?

1. We calculate the capacity of all screw conveyors with our own developed calculation program
2. We always offer the customer to include steel elements for easy installation on-site to reduce this cost element
3. We make a machine drawing for each tubular screw conveyor including a part list with all relevant measurements
4. We deliver a complete documentation package to make later spare part ordering easy

In BEMA we treat screw conveyor project as complete delivery consiting of the following elements:

• Design taken all requirements into consideration
  • ATEX demands
  • Hygienic demands
  • Abrasive material
  • Other relevant requirements for the screw conveyors
• Manufacturing of the screw conveyors
• Complete test-run of all manufactured tubular screw conveyors
• Shipping of the screw conveyor project
• Delivering of a documenation package for future maintenance of the screw conveyors

FAQ: Inclined Tubular Screw Conveyors for Premix

1. What are inclined tubular screw conveyors used for?

They are designed for transporting premix building materials in concrete production. Their tubular housing minimizes backflow and ensures efficient vertical or steep‑angle conveying.

2. What are the key design parameters for conveyors above 45°?

For inclinations over 45°, the screw pitch must be reduced, the gearbox power increased, and a tubular housing is essential to maintain flow and prevent material fallback.

3. How does BEMA increase the lifetime of these conveyors?

BEMA uses self‑carried inner tubes, thicker screw flights, high‑quality bearings, braided packings in pack boxes, and premium gearboxes to ensure long service life with minimal maintenance.

4. What installation advantages do these conveyors offer?

All conveyors are delivered with clamps for easy mounting of steel structures on‑site. BEMA also offers steel elements to reduce installation time and overall project cost.

5. How does BEMA handle screw conveyor projects?

BEMA manages the full process: capacity calculations, machine drawings, documentation packages, ATEX and hygiene considerations, manufacturing, full test‑runs, shipping, and support for future maintenance.