White cooling screw.

Cooling screw conveyors

Cooling Screws are used for either rapidly cooling or heating the conveyed material. The conveying screw and frame act as heat exchangers using a liquid (water or water-glycol solution) for heat transfer. The material is cooled via a coolant flow inside the conveying screw and in the frame of the conveyor.

Laitex designs and manufactures Cooling Screw conveyors for extreme conditions, both vertical and horizontal conveying. Through a comprehensive development work, we’ve designed a product that is both a cost-effective and long-lasting solution for conveying and cooling bulk material.

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Specifications for typical applications
InclinationUp to 9°
Width Up to 1000 mm
LengthUp to 10 m
Construction details
Construction materialsCarbon-, stainless, wear resistant, high temperature or heat resistant steels. Hard facings and other materials on request.
Conveying elementApplication specific screw flight design.
Drive unitGear motor with direct drive.
ComponentsService hatches for inspection and service. Standard pillow block bearing housings with radial roller bearings. Stuffing boxes for shaft sealing (Optionally boxes with air input). Sensors for rotation and blockage. Rotating coupling for cooling water feeding.
SafetyGuards and protective devices according to SFS-EN 618.
Other options are available on request
ATEX directive (2014/34/EU)
(Activated Carbon)
All Laitex devices can be equipped to fulfil the requirements of ATEX Equipment group II in categories 2 G, D and 3 G, D (suitable for ATEX zones 1, 2, 21 and 22).
All Laitex equipment conform to Machinery Directive 2006/42/EC, and are therefore acceptable for CE-marking.

Laitex's cooling Screws

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Characteristic Benefits

  • Cooling and heating.
  • Best cooling conveyor solution for short distances.
  • Tailored solutions for extreme conditions.
  • Material flow easily divided or combined.
  • Conveying horizontally and vertically.
  • Decades of service life.
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Bulk materials

  • Bottom Ash
  • Fly Ash
  • Sand
  • Reburned lime
  • Activated carbon
  • Other materials as requested

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