Revolutionary Concept & Design in Heat Exchanger Technology

Spirajoule is a heated, coreless screw manufactured to provide optimal thermal transfer to a variety of finely divided wet and dry products. Maximum efficiency is achieved through the product direct contact with the electrically heated screw. Exclusive and worldwide patented.



Spirajoule / MT / HT

Heating and conveying electrically heated up to 1652° F (900° C)

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Cooling or heating screw can use steam or chilled H2O for heat exchange media through screw or jacket

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Revolutionary concept & design in heat exchanger technology

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Dryers, coolers or roaster excellent for grains, seeds, etc.

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Spirajoule® NA Brochure

Innovative & Sustainable
Thermal Solutions For Industry

Spirajoule® NA PDF >>


Patented Spirajoule Processes

Industries Served
  • Chemical
  • Food Processing
  • Mining & Minerals
  • Petro-Chemical
  • Power Generation & Energy
  • Industrial Wastewater
  • Municipal Treatment
  • Pharmaceutical
  • Biomass/Sludge
  • Nutraceuticals


Typical Applications
  • Drying
  • Heating 
  • Cooking
  • Cooling
  • Toasting
  • Desorption
  • Calcining
  • Torrefaction
  • Pyrolysis (Biogreen)
  • Sterilization
Process Technology
  • Calcining
  • Cooking
  • Cooling
  • Crystallizing
  • Drying
  • Heating
  • Pyrolizing
  • Thermal Desorption
  • Torrefraction


Exclusive and Worldwide Patented
Electrical Heating Screw Conveyor

The Evolution

Etia (France) and Norris Thermal Technologies (Indiana) are pleased to announce the restructuring of their partnership in North America forming the affiliate Spirajoule NA.

The new Company will provide LOCAL presence and will have the ability to provide solutions to process problems involving drying, cooking, cooling, calcining desolventizing, torrefaction, pyrolysis, gasification, sterilization and other thermal operations.

Solutions involving environmental (green) approaches as well as other unique methods will be available. Applications in the Process markets such as Chemical, Petro, Food, Pharma, Mining and Minerals, Energy and Power, Pulp and Paper, as well as the waste water from such processes will be addressed with the goal of a sustainable future.