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.

Laitex's cooling Screws

Laitex_ikoniArtboard 6

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.
Laitex_ikoniArtboard 4

Bulk materials

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

Read more

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).
CE-Marking
All Laitex equipment conform to Machinery Directive 2006/42/EC, and are therefore acceptable for CE-marking.

Related solutions

3d model from bottom ash handling system.

Bottom Ash Handling & Sand Recycling

Bottom ash handling refers to the process of removing and processing ash, slag, sand, and non-combustible particles from the bottom of a boiler to containers or a bunker. Our well-planned solutions increase efficiency and production capabilities of the plant's operations.
Activated carbon plant model with activated carbon equipment by Laitex.

Activated carbon plants

The growing international demand for activated carbon drives the need for activated carbon plants. Laitex has designed equipment suitable for conveying and handling activated carbon efficiently.
Blue ash conveyors for recovery boiler.

Recovery boiler

The black liquor burned in the recovery boiler produces chemicals for white liquor, and steam. Laitex's ESP equipment and ash conveying solutions focus on the efficient handling, conveying, and recycling of ash and chemicals produced in a recovery boiler.

we work.

globally.