SONDEX® Free Flow plates

  • Overview
  • FAQ

Our SONDEX® Free Flow pattern is designed to treat media that is unsuitable for regular heat exchangers due to high viscosity, fiber and particle contents, or considerable risk of fouling.

What does that mean for you?

The deep and wide channels provide ample room for the hard-to-treat media to flow effortlessly, ensuring gentle treatment of the output product and leading to sustainable quality improvements.

Since there is only line contact between the plates, even long and sticky particles will not get stuck and clog the heat exchanger.

The Free Flow plates are also well-suited for media that have a tendency to cause fouling, and are designed with the fouling factor in mind. The channels allow for an efficient flow and heat transfer, in spite of the accumulated fouling, deferring the cleaning downtime.

This enables a sugar producer, for example, to operate at full capacity throughout an entire campaign without losing valuable production time and product output.

Features and benefits

Ensures an unimpeded flow due to the deep channels and limited contact points between the plates. The large plate gap is designed to handle media that cause fouling and clog regular heat exchangers.

Extended operation time, with no cleaning needed, regardless of the media’s viscosity, fouling tendency, and particle contents.

Asymmetric patterns are available for applications with big flow rate differences. Taking the flow rate differences into account eliminates problems with air pockets, media maldistribution and low turbulence.


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.

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.

Please contact your local SONDEX® brand sales responsible.

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.