Danfoss SONDEX®

Heat Exchangers

plate evaporators

Our SONDEX® plate evaporators are designed to handle advanced evaporation duties. Using semi-welded plate cassettes, the media are guaranteed to never mix. The plate cassettes are designed to ensure the optimal level of turbulence on both sides while providing an even distribution of the media for superior performance and product quality.

Our standard, semi-welded, and brazed SONDEX® plate heat exchangers are outstanding choices for standard evaporation duties.

However, certain applications prove unsuitable for regular heat exchanger types. To help you obtain unsurpassed product quality, we have created exclusive evaporator plates tailored to meet the challenges presented by advanced evaporation applications.


Features and benefits

  • Special plate design featuring an extra-large inlet connection for steam. Steam consumption can be reduced when operating with multi-stage evaporators, as the product vapor will serve as the heating media.
  • Flexible design that makes it easy to increase capacity by adding additional cassettes or decrease it to save energy. Low residence time leads to perfect evaporation conditions and superior product quality.
  • High performance, even with low temperature differences between the media, which is especially great for mechanical vapor recompression (MVR) and thermal vapor recompression (TVR).

Technical specifications

  • Connections up to DN600 (24")
  • (Frames designed according to FEA and PED 2014/68/EU (EN13445) and ASME sec VIII, Div. 1 construction standards)
  • Plate materials: AISI 304/316, titanium, SMO, Hastelloy*
  • Gasket materials: EPDM-HT, NBR-HT*
  • Plate heights up to 1.7 m (5.6 ft)
  • Flow rates up to 800 m3/h (3,522 gpm)
  • Working pressure up to 16 bar (145 psi)
  • Working temperatures from -20 °C to 180 °C (-4 °F to 356 °F)

*other materials available upon request



  • Dairy/food/beverage industry
  • Sugar industry
  • Biogas industry
  • Pulp and paper industry
  • Mining industry
  • Chemical industry

How does a SONDEX® plate heat exchanger work?


What kind of heat exchanger is right for me?

The choice of heat exchanger depends on many factors. Our skilled sales engineers design the heat exchanger with the appropriate dimensions and correct specifications based on your input and requirements, to ensure that you receive a quality solution that performs optimally.

Which certificates are available for the heat exchangers?

Our heat exchangers are approved and certified according to industry standards and requirements. For specific details, please reach out to your local SONDEX® brand sales representative.

Where can I get a price list?

Please contact your local SONDEX® brand sales responsible.

How can I get a quotation?

Please contact your local SONDEX® brand sales office. For the most accurate quotation, please prepare the following data:

• Duty,
• Type of media,
• Pressure drop,
• Flow rate,
• Working pressure,
• Thermodynamic properties, Temperature,
• Working temperature.


What would you like to know more about? We offer a wide range of informative content relating to our products. You can find general information about our products in brochures, technical specifications on data sheets, and various instructions in operating and maintenance guides.

Want to know more?

Please get in touch with your local contact person for more information and learn how Danfoss can help improve your business. Additionally, please feel free to send us a mail.

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