Plate heat exchangers - Meeting your requirements

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Our SONDEX® standard plate heat exchangers are the ideal choice for a wide range of applications across numerous market segments. Innovative technologies and smart design make our standard plate heat exchangers a stellar investment and the go-to choice for standard duties. With higher heat transfer efficiency and optimisation, these heat exchangers offer the most efficient thermal performance.

We have one of the largest plate portfolios in the world and we customise each heat exchanger to meet your exact requirements. The versatile design and high thermal efficiency make them the perfect solution for a wide range of applications, including the transfer of heat across a diverse temperature difference.

Features and benefits

Experience the benefit of an individually customised solution that perfectly matches your requirements and lowers your energy consumption, thus improving energy efficiency. Our heat transfer solutions ensure that there are no stagnant zones and create high flow turbulence for optimal results.

High performance for a low pressure drop eliminates unnecessary burdens on your system and optimises overall system performance.

We design single-pass solutions when possible, as they are the preferred choice for almost all duties. With all connections on the head you do not need to disconnect the heat exchanger from the piping to perform inspection, cleaning, or service.

Gasketed plate heat exchangers are uniquely designed with specific plate features, including frame and pressure plates. These special features ensure the entire heat transfer surface is utilised, thereby enhancing the heat exchanger performance. thus improving energy efficiency. Our heat transfer solutions ensure that there are no stagnant zones and create high flow turbulence for optimal results. The design results in a compact solution with a small footprint, simple installation, and easy access for maintenance.

Discover how the SONDEX® gasketed plate heat exchanger operates.

From design and construction to working principles, we take you through the key features behind these high-efficiency heat transfer solutions.


  • HVAC industry - e.g. district cooling solutions using seawater and groundwater as cooling source - e.g. district heating solutions using, for example, solar and geothermal energy as heating source

  • Marine/offshore industry - e.g. central and lubrication oil cooling

  • Dairy/food/beverage industry - e.g. pasteurisation, heat recoveries, and duties that require gentle treatment

  • Sugar industry

  • Biogas industry

  • Pulp and paper industry

  • Heavy industry

  • Mining industry

  • Petrochemical industry

  • Chemical industry - e.g. waste heat recovery from condenser water

Technical specifications

  • Connections from DN25 to DN600 (1" to 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, Viton*

  • Plate lengths up to 5.5 m (18 ft)

  • Flow rates up to 7,200 m3/h (31,700 gpm)

  • Working pressure up to 35 bar (500 psi)

  • Working temperatures from -20 °C to 180 °C (-4 °F to 356 °F)

*Other materials are available upon request.

D-plate technology

D-plate technology

Our Danfoss engineers have enhanced the way heat exchanger plates are designed with the introduction of the new D-plate series. With various pressing depths and corrugated plates, the media flow in an opposite direction in alternate channels between the plates. This results in transferring heat effectively. Drawing on years of experience within heat transfer technology and deep application knowledge, we have made significant upgrades to the traditional Fishbone plates to truly redefine the way we think of heat exchanger plates.

SONDEX® Fishbone plates

SONDEX® Fishbone plates

SONDEX® Fishbone plate pattern technology is used for the vast majority of our plate heat exchangers. The pattern is designed for high thermal performance while using the allowed pressure drop in the most efficient manner. Available with different pressing depths, pattern pitch and angles – each plate has a pattern that is optimised for a certain duty. These heat sensitive plates provide optimal performance and guarantee efficient heat transfer area across a full range of applications.

Our product range includes small to large heat exchangers suitable for all types of industries. For instance, heat transfer solutions like our SONDEX® condensers and evaporators are designed for advanced duties. They accommodate high flow rates and work under diverse system pressures and temperatures.

At Danfoss, we believe that every heating or cooling challenge can be met with innovative heat exchanger solutions. Whether it's hot water production in domestic hot water systems or handling aggressive, corrosive fluids in the chemical industry, we have a solution in our vast product range.

Delving Deeper into our Heat Transfer Solutions

At Danfoss, we ensure that every product in our range delivers maximum efficiency and optimal performance. Our plate heat exchangers and gasketed plate heat exchangers are robust, reliable, and built to last, reflecting our commitment to quality and customer satisfaction.

Our heat exchangers, known for transferring heat efficiently across the entire heat transfer surface, are designed with the specific plate features that optimize heat transfer area. This results in a smaller footprint and increased energy efficiency, making our solutions a top choice across various industries.

Explore our product range and discover how we can enhance your system's performance, reduce energy consumption, and ensure the efficient transfer of heat. Get in touch with us today for more information on how our plate heat exchangers can make a difference in your operations.


Type Name Language Valid for Updated Download File type
Brochure A world of heat exchangers Romanian, Moldavian, Moldovan Romania 16 Nov, 2022 4.1 MB .pdf
Brochure A world of heat exchangers English Multiple 25 Jan, 2023 6.9 MB .pdf
Brochure A world of heat exchangers Hungarian Hungary 15 Feb, 2023 1.8 MB .pdf
Brochure A world of heat exchangers Italian Italy 03 May, 2022 4.8 MB .pdf
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 Anatomia e Conhecimento dos Trocadores de Calor a Placas SONDEX® Portuguese Multiple 26 Jun, 2019 7.2 MB .pdf
Brochure D-plate technology - Experience D-power English Multiple 30 Jan, 2023 6.0 MB .pdf
Brochure Danfoss Design Code (DDC) French France 29 Nov, 2021 302.6 KB .pdf
Brochure Danfoss Design Code (DDC) English Multiple 06 Sept, 2021 497.0 KB .pdf
Brochure Eine Welt der Plattenwärmetauscher German Multiple 06 Jul, 2021 14.8 MB .pdf
Operating guide Gasketed and semi-welded Plate type heat exchangers English Multiple 13 Sept, 2023 9.6 MB .pdf
Operating guide Gasketed and semi-welded Plate type heat exchangers English Multiple 20 Sept, 2022 9.7 MB .pdf
Operating guide Gasketed and semi-welded Plate type heat exchangers English Multiple 01 Sept, 2023 13.0 MB .pdf
Operating guide Gasketed and semi-welded Plate type heat exchangers English Multiple 01 Sept, 2023 9.6 MB .pdf
Operating guide Gasketed and semi-welded Plate type heat exchangers Polish Multiple 13 Sept, 2023 9.2 MB .pdf
Operating guide Gasketed and semi-welded Plate type heat exchangers Hungarian Multiple 13 Sept, 2023 9.1 MB .pdf
Operating guide Gasketed and semi-welded Plate type heat exchangers Danish Multiple 15 Sept, 2023 9.1 MB .pdf
Data sheet Gasketed Plate Heat Exchangers DN 100 Lithuanian Multiple 27 Jan, 2021 3.0 MB .pdf
Brochure Heat exchangers for the power industry English Multiple 24 Mar, 2021 4.7 MB .pdf
Brochure Heat Transfer Solutions Brochure German Multiple 16 Nov, 2018 6.0 MB .pdf
Data sheet S1-S4A-S6A-S8A_DN 32/1.25”_GPHE English Multiple 23 Sept, 2019 2.2 MB .pdf
Data sheet S140-S201-S300_DN 500/20"_GPHE English Multiple 18 Nov, 2019 2.0 MB .pdf
Data sheet S21-S22-S36-S37-S45SE-S47-S55SE-S64_DN 100/4"_GPHE English Multiple 19 Jun, 2019 3.0 MB .pdf
Data sheet S41-S42-S62-S63-S79-S86-S87-S110_DN 150/6"_GPHE English Multiple 03 Jul, 2019 3.2 MB .pdf
Data sheet S43-S65-S100-S130-S131-S152-S221-S229_DN 200/8"_GPHE English Multiple 03 Jul, 2019 3.4 MB .pdf
Data sheet S67-S113-S155_DN 250/10"_GPHE English Multiple 23 Jul, 2019 2.4 MB .pdf
Data sheet S7A-S14A-S20A_DN 50/2"_GPHE English Multiple 19 Jun, 2019 2.3 MB .pdf
Data sheet S81-S121-S188-S251_DN 300/12"_GPHE English Multiple 23 Jul, 2019 2.4 MB .pdf
Data sheet S9A-S19A-S31A-S44A_DN 65/2.5"_GPHE English Multiple 03 Jul, 2019 2.5 MB .pdf
Brochure SONDEX Płytowe wymienniki ciepła Polish Poland 15 Nov, 2019 7.4 MB .pdf
Brochure SONDEX® Free Flow sugar brochure English Multiple 22 Jun, 2020 7.7 MB .pdf
Brochure SONDEX® Scambiatori di calore a piastre tradizionali Italian Multiple 26 Jun, 2019 6.5 MB .pdf
Brochure SONDEX® Traditional Plate Heat Exchangers English Multiple 16 Aug, 2021 9.5 MB .pdf
Brochure SONDEX® Traditionelle Plattenwärmetauscher German Multiple 26 Jun, 2019 9.5 MB .pdf
Brochure SONDEX® 可拆式板式换热器 (Sondex® Traditional plate heat exchangers) Chinese (CN) Multiple 26 Jun, 2019 6.8 MB .pdf
Brochure Wymienniki ciepła Sondex Polish Poland 19 Jul, 2019 1.5 MB .pdf
Brochure Брошура_Вдосконалені рішення теплообміну Ukrainian Ukraine 01 Sept, 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.