SondBlock plate heat exchangers

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Our SONDEX® SondBlock heat exchangers (SB/SBL) are compact and durable solutions for challenging applications that involve aggressive media, extreme temperatures, and/or high pressure. As SondBlock heat exchangers have no exposed gaskets, they can replace shell and tube heat exchangers and cover the same duties, yet offer numerous advantages in terms of cost, size, and performance.

SondBlock heat exchangers are much less prone to fouling and clogging and only require occasional inspection and cleaning.

Maintenance and cleaning is less time consuming and space demanding as all the panels on the heat exchanger can easily be removed. The entire plate pack is accessible from all sides with no additional space required.

Block heat exchangers in general mark the beginning of a new era of efficient heat transfer, even for the most challenging applications.

Features and benefits

Perfect as condensers that can be configured to handle duties with or without condensate sub-cooling. SondBlock heat exchangers are also good choices as steam heaters or reboilers for non-cyclic duties, and a smooth and stable steam control system.

A very durable heat exchanger that excels at handling aggressive and fouling media. Able to handle aggressive media on both sides, it is a perfect solution for crude oil refineries and petrochemical plants. A top choice for the most challenging duties.

Increased production output due to the extended uptime of the heat exchanger. Very low maintenance and service requirements. Removable side panels provide fast and easy access to the plate pack for inspection or cleaning.


  • HVAC industry
  • Pulp and paper industry
  • Heavy industry
  • Mining industry
  • Petrochemical industry
  • Chemical industry
  • Oil and gas production
  • Steam heaters and reboilers
  • Partial condensers without condensate sub-cooling
  • Partial condensers with condensate sub-cooling

Technical specifications

  • Connections from DN50 to DN1000 (2" to 40")
  • Frames designed according to FEA and PED 2014/68/EU (EN13445) and ASME sec VIII, Div. 1 construction standards
  • Plates made from AISI 304/316, titanium*
  • Shell materials: Carbon steel, stainless steel
  • Working pressure up to 25 bar (363psi)**
  • Working temperature -20 °C up to 300 °C (-40 °F to 572 °F)***

*other materials available upon request
**Higher pressure levels available upon request
***Lower temperatures available upon request


Type Name Language Valid for Updated Download File type
Brochure A world of heat exchangers English United States 08 Jul, 2021 19.0 MB .pdf
Brochure A world of heat exchangers Latvian Latvia 28 May, 2020 7.1 MB .pdf
Brochure A world of heat exchangers Hungarian Hungary 15 Feb, 2023 1.8 MB .pdf
Brochure A world of heat exchangers English Multiple 25 Jan, 2023 6.9 MB .pdf
Brochure A world of heat exchangers Italian Italy 03 May, 2022 4.8 MB .pdf
Brochure A world of heat exchangers Romanian, Moldavian, Moldovan Romania 16 Nov, 2022 4.1 MB .pdf
Brochure Eine Welt der Plattenwärmetauscher German Multiple 06 Jul, 2021 14.8 MB .pdf
Brochure Wymienniki ciepła Sondex Polish Poland 19 Jul, 2019 1.5 MB .pdf
Brochure Брошура_Вдосконалені рішення теплообміну Ukrainian Ukraine 01 Sep, 2022 3.2 MB .pdf

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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.