CA - Trough Screw Conveyors

Project Description

Description - The modular CA Trough Screw Conveyor system is highly versatile offering numerous solutions for conveying powdery or granular materials. CA Screw Conveyors are manufactured from carbon steel with a suitable surface finishing. They are made up from a U or V-shape trough that is equipped with at least one outlet spout, an end plate at each trough end, helicoid screw flighting welded on a centre pipe with a coupling bush at each end, two end bearing assemblies complete with shaft sealing unit, a certain number of intermediate hanger bearings depending on the overall length of the screw conveyor, and bolted trough cover sections. Furthermore, CA Trough Screw Conveyors are equipped with a gear motor that suits the application. Depending on the material to be handled CA Trough Screw Conveyors come in a light, medium-heavy, or extra-heavy-duty design. All types are available with ATEX, zone 22 certification.

Function - The light-duty version, CA L, is mainly used to convey powders or granular materials in the production of pet-food, in the plastics industry, and in soap, washing powder and detergentprocessing. The medium-heavy-duty version, CA P, is mainly used in animal feed milling, in wood processing, in the chemical industry and in environmental technology for both municipal and industrial applications. The extra-heavy-duty version, CA E is mainly used in the cement / lime / gypsum, as well as in the mining industry. According to the application various types of screws, inlet and outlet spout models are available.

Performance & Technical Features - Benefits

  • Powder-coated
  • Helicoid flightings welded on centre pipe
  • Trough in modular flanged sections in standard lengths
  • Flanged end bearing assemblies protected against material infiltration by shaft sealing units
  • Robust cast iron body flanged end bearing assemblies with externally positioned bearing units and manually adjustable packed gland seals
  • Square or rectangular outlet spouts with integrated drilled flanges according to standards.
  • Drive units mounted at inlet or outlet end:
    • Bare shaft
    • Direct compact gear motor drive
    • Direct gear motor drive with semi-elastic coupling
    • Offset gear motor drive with chain transmission
    • Offset drive with belt transmission

For light-duty version:

  • Splined shaft couplings (bolted couplings for special applications)
  • Intermediate cast or fabricated hanger bearings with greased or self-lubricating slide bushes

For medium-heavy-duty version:

  • Splined shaft couplings (bolted couplings for special applications)
  • Intermediate cast hanger bearings with greased or self-lubricating slide bushes

For extra-heavy-duty version:

  • Flanged shaft couplings
  • Intermediate steel or cast hanger bearings with slide bushes
  • Offset drive with belt transmission and with semi-elastic coupling

Options & Accessories

For medium-heavy and extra-heavy-duty version only:

  • Bolted trough cover modules (end module with integrated inlet spout)
  • Square, rectangular or circular substitute/additional inlet/outlet spouts with or without connecting flange
  • Trough feet
  • Overflow hatches
  • Screws in various configurations (ribbon flight, paddles, others)
  • Special shaft seals (gas or air-purged, grease chamber, others)
  • Different drive configurations
  • Screws made from special wear-resistant materials


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