Search within pages and documents

Request contact from Alfa Laval

Please select your country.

Contherm Scraped Surface Heat Exchangers

The Contherm scraped-surface heat exchangers are designed for heating and cooling operations in the continuous and semi-continuous processing of many food, health and beauty aid products.


Many prepared food products would quickly foul normal types of heat exchangers, because they’re viscous or sticky, contain particles or alter state when heated.

The new generation of Contherm scraped-surface heat exchangers from Alfa Laval is updated with four new performance enhancements that extend the capabilities of the Contherm range. This means enhanced food safety initiatives, even more gentle treatment of the product and improved resistance to wear and chemical corrosion. An upgrading service named, ConthermFlex, is also available. This gives customers with old scraped surface technology an opportunity to upgrade their equipment.
Finally, there’s a newly developed, larger Contherm 6 x 11 with 15 % more surface area and up to 25 per cent more capacity than traditional sizes.

  • new blade materials with improved physical properties compared to traditional blades. These include a unique detectable polymer that enhances food safety and food security initiatives.
  • a new three-inch tangential head, designed specifically for sanitary and food-processing applications, improves product quality by treating it more gently. It is available as an option for new Contherm heat exchangers or as a retrofit.
  • the new Alfaloy cylinder coating is a thin diamond-impregnated material that offers improved resistance to wear and chemical corrosion. Alfaloy is a cost-effective, FDA-compliant material that extends the service life of the Contherm’s other components.

Convap evaporation module

The Contherm SSHE can be modified to form the Convap evaporator, which is particularly suited to concentrating viscous products. The system normally operates under vacuum. The entrainment separator connected to the SSHE by means of a specially designed vapor head allows the
separation of the concentrate from the vapor phase.

How it works

How the Contherm scraped surface heat exchagner works

The Contherm SSHE range is able to deal with the kinds of products where other types of heat exchangers are known to clog or foul.

See how it works in below animation, showing some of the unique features you will obtain by using a Contherm.



In scraped-surface heat exchangers, the product enters the cylinder at the bottom and flows upwards. The heating or cooling medium travels in a counter-current flow through a narrow annular channel.

Rotating blades continuously remove product from the cylinder wall to ensure uniform heat transfer to the product. The product enters the cylinder in a corkscrew pattern in the same direction as the rotating part. This preserves product quality by providing a larger flow area, gentler product handling and reduced pressure drop across the inlet.The food product finally leaves the cylinder at the top.

Both product flow and rotor speed can be varied to suit the particular properties of the product in the cylinder.

Rental units are also available. For reasons of confidentiality, if you prefer to carry out processing trials using Contherm in your own plant and with your own personnel, we can offer you a Contherm test unit on a rental basis along with qualified Contherm personnel during start-up.


How the Convap scraped surface evaporator / concentrator works



For further information, please contact Alfa Laval at e-mail address: or your nearest Alfa Laval sales office.

How the Convap scraped surface evaporator / concentrator works

Request information

Request information for Contherm Scraped Surface Heat Exchangers