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OFFICIAL SONFLOW DISTRIBUTOR FOR GREECE, CYPRUS AND ROMANIA
SonFlow Gasketed Plate Heat Exchangers
Selection and supply for new installations, replacement projects and spare parts
You do not need to know the exact model in advance. Send us the operating data or information about the existing heat exchanger. KONTECH will identify the appropriate SonFlow series, size, materials, connection type and configuration.
Manufactured in Kolding, Denmark
Plate options in AISI 304, AISI 316 or titanium
Gaskets and connections selected for the specified configuration
A new heat exchanger, a replacement or spare parts?
Choose the option that matches your requirement and send the information you have. If further details are needed to prepare the quotation, we will contact you to confirm them.
New heat exchanger
Do you need a heat exchanger for a new installation or to increase the capacity of an existing system?
Send details of the fluids on both sides, flow rates, inlet and required outlet temperatures, operating pressure and allowable pressure drop, if specified. We will use this information to identify a suitable SonFlow series and configuration.
Replacement of an existing heat exchanger
Do you need to replace an existing heat exchanger?
Send a photo of the nameplate and the unit, together with any available operating data, overall dimensions and connection details. We will assess whether a SonFlow model can replace the existing unit and what is required for installation in the existing system.
Plates and gaskets
Do you need individual plates, gaskets or a complete plate pack for an existing gasketed plate heat exchanger?
Send the available details, including the model, serial number, number of plates and photos of the nameplate or plate. We will help you to select the correct gasket material. Compatibility will be checked before specific parts are offered.
SonFlow series by application and system scale
The groups below provide initial guidance. The model, plate material, number of plates and connection type are selected according to the fluids, flow rates, temperatures, pressure, allowable pressure drop and installation conditions.
Compact installations
SF30, SF50 and SF55
A starting point for systems with connections up to DN50 / 2" and limited installation space.
SF30 is the smallest SonFlow gasketed series by overall dimensions. KONTECH often recommends the SF51 model from the SF50 series where a balance between investment cost and application requirements is required. SF55 is our best-selling gasketed series.
Typical applications: heating and cooling circuits, small district heating substations and heat pump systems.
HVAC, heating and cooling
SF60 and SF100
The SF60 series includes four models with DN65 flanged connections. This makes it suitable for systems built around this pipe connection size.
The SF100 series includes five models with DN100 connections. This provides a wider choice where the piping system or operating conditions require a different configuration. In both series, the gasketed construction provides access to the plates for maintenance.
Typical applications: district heating substations, central heating and cooling systems, and water circuits serving heat pumps and chillers.
Food and beverage processing
SF70 and SF80
SF70 and SF80 are designed for hygienic applications in food and beverage production. In these processes, the plates and gaskets are in contact with the product, while cleaning forms part of the operating cycle. Plate material, gasket type and connections are therefore selected according to the product, temperatures and cleaning method used for the process line.
Typical applications: heating and cooling food products, beverage production and dairy processes.
Heat transfer with a temperature approach of 0.5°C
SF100HE, introduced in 2026
SF100HE is designed for applications requiring precise temperature control. According to SonFlow, the High Efficiency (HE) plates enable a temperature approach of 0.5°C. The achievable value for a specific project is determined during thermal sizing.
Typical applications: heat recovery and industrial processes requiring a close temperature approach.
Industrial processes
SF100, SF150 and SF200
These series are used to cool and heat process fluids and to recover waste heat in industrial installations. SF100 includes five models with different frame sizes and connection options. This allows selection according to flow rate and installation conditions. SF150 and SF200 extend the range with larger connection sizes for higher-flow systems.
Typical applications: process water, cooling machinery and equipment, and waste heat recovery.
Large flow rates and heat duties
SF250, SF300, SF350, SF400 and SF500
These series are intended for large industrial, energy and infrastructure installations, with connection sizes up to DN500. SF500 is the largest SonFlow gasketed series by overall dimensions.
For these projects, transport, installation and future maintenance requirements are also assessed.
Typical applications: high-flow industrial duties, energy systems and district heating and cooling.
Which SonFlow configuration is suitable for your project?
Send the available operating data and installation requirements. KONTECH will assess the relevant options and prepare a quotation.
SonFlow SF series and models
The SonFlow SF range covers gasketed plate heat exchangers from the compact SF30 to the largest SF500. The models differ in overall dimensions and connection options.
The listed series provide initial guidance. The model, number and material of plates, gasket type and connections are selected according to the operating data and installation conditions.
the most compact series in the SF gasketed range
Models: SF31 and SF33
SF30 is the smallest SonFlow gasketed series by overall dimensions. It is an option for new installations and replacement projects where installation space is limited.
broad application range at a competitive price
Models: SF51 and SF51D
KONTECH recommends the SF50 series when price is a key selection factor. It covers a wide range of heating, cooling and process applications.
a bestseller in the gasketed PHE category
Models: SF55, SF56 and SF57
SF55 models are used for heating and cooling in HVAC and industrial installations. Selection is based on the operating data and available space.
DN65 flanged connections
Models: SF61, SF62, SF63 and SF64
The SF60 series includes single-pass gasketed plate heat exchangers for heating, cooling and industrial installations.
configurations for food processing
Models: SF71
SF71 is designed for heat transfer in food processing. The port design and plate pattern are engineered for the gentle treatment of sensitive products.
DN80 connections for food processing
Models: SF81
SF81 is available with DN80 connections, while SF71 uses DN50 connections. The final configuration is determined during sizing according to the operating data.
wide range of configurations
Models: SF101, SF101D, SF102, SF103 and SF104
The series is available with DN100 flanged connections and DN80 or DN100 connection options for food processing. Typical applications include district heating substations, process circuits and heat recovery systems.
for precise temperature control
Models: SF106HE and SF107HE
Introduced in 2026, the SF100HE series is designed for precise temperature control. The High Efficiency (HE) plates enable a temperature approach of 0.5°C with suitable sizing and operating conditions.
DN150 flanged connections
Models: SF151, SF151D, SF152, SF152D, SF154 and SF156
The SF150 series is available with DN150 flanged connections for HVAC and industrial installations. The SF151D and SF152D variants use a deeper plate pattern that reduces the risk of clogging.
DN200 flanged connections
Models: SF201, SF202, SF203 and SF204
SF200 is a series of plate heat exchangers for industrial and HVAC systems with high flow rates. The gasketed construction allows cleaning and replacement of plates and gaskets.
DN250 flanged connections
Models: SF251, SF252 and SF253
The SF250 series includes single-pass heat exchangers for HVAC and industrial installations. The model and number of plates are selected according to the flow rate, temperatures and allowable pressure drop.
DN300 flanged connections
Models: SF301, SF302 and SF304
The SF300 series includes single-pass heat exchangers for HVAC and industrial installations. Plates are available in AISI 304, AISI 316 or titanium. The material is selected according to the fluids and operating conditions.
DN350 flanged connections
Models: SF352, SF353 and SF354
The SF350 series is intended for industrial, utility and energy installations. The model and number of plates are selected according to the flow rate, temperatures and allowable pressure drop.
DN400 flanged connections
Models: SF401 and SF402
The SF400 series is intended for large industrial and HVAC installations. The model is selected according to the operating data, available installation space and required service clearance.
the largest series by overall dimensions
Models: SF502
The SF500 series is available with DN500 flanged connections. The operating data, transport requirements, installation space and required service clearance are assessed during selection.
Configuration based on the fluids and operating conditions
SonFlow SF gasketed plate heat exchangers are configured for the specific installation. Selection takes account of the fluids, flow rates, temperatures, pressure and allowable pressure drop.
Plate material
AISI 304, AISI 316 or titanium
The plate material is selected according to the composition of the fluids and the operating conditions:
- AISI 304: for water and other media where their composition is compatible with this material
- AISI 316: where higher corrosion resistance is required
- Titanium: for selected media with elevated salt and chloride concentrations, including certain pool water, mineral water and seawater applications
The material is selected after the fluid composition and operating conditions have been confirmed.
Plate thickness
According to the operating conditions
Plate thickness is selected according to the plate design, pressure and temperatures in the system. A thicker plate is not automatically the better choice. The required thickness is determined for the specific operating conditions.
The aim is to achieve an appropriate balance between:
- efficient heat transfer
- mechanical strength
- resistance under the specified operating conditions
- expected service life
Gaskets
EPDM or NBR
The gasket is in direct contact with the operating medium. It must be compatible with the fluid, operating temperature and cleaning agents used.
- EPDM is commonly used in water applications and heating or cooling systems
- NBR is often suitable for oils, fats and selected industrial fluids
Plate configuration
Number and type of plates
The number and configuration of the plates are determined according to the flow rates, temperatures, required heat duty and allowable pressure drop. These parameters define the required heat transfer area.
Connections
Type and size according to the model
The connection type is selected according to the model, piping system and installation conditions. When replacing an existing unit, the connection layout and available space are also checked.
For compact heating and cooling systems with clean fluids where access to the plate pack is not required, see the SonFlow brazed plate heat exchangers.
For viscous, dirty or particle-laden fluids that require an unobstructed flow channel between the plates, see the Free Flow plate heat exchangers.
Gasketed plate heat exchanger for swimming pool heating
KONTECH supplies SonFlow SF heat exchangers for swimming pool heating, including configurations with titanium plates where increased corrosion resistance is required. The gasketed construction provides access to the plates for maintenance, cleaning and replacement.
Titanium plates for pool water conditions
Pool water may be mineral-rich or treated with chlorine-based chemicals or salt electrolysis. Titanium plates provide increased corrosion resistance where salt and chloride levels are elevated. Plate and gasket materials are selected according to the water composition, treatment method and operating temperature.
Access for cleaning and plate replacement
Deposits may build up on the heat transfer surfaces. The gasketed construction allows the plate pack to be opened for inspection and cleaning. Damaged plates and worn gaskets can be replaced. Additional plates can be added if a higher heat duty is required.
Send details of the pool water and treatment method, together with the flow rates and temperatures. KONTECH will prepare a quotation for the specific installation.
Frequently asked questions
Yes. The gasketed construction allows the heat exchanger to be opened for maintenance and for deposits to be removed from the plates. Where higher corrosion resistance is required, KONTECH can offer configurations with titanium plates selected according to the composition and treatment of the pool water.
The replacement option is assessed according to the operating data, overall dimensions and connections of the existing unit. Send a photo of the nameplate and the available technical information. KONTECH will identify a suitable configuration and confirm any changes required to the installation.
Yes. KONTECH supplies gaskets, individual plates and complete plate packs with gaskets. We recommend replacing the gaskets whenever the heat exchanger is opened for maintenance. Individual plates can also be replaced if damage is identified.
Send the model, serial number and a photo of the nameplate so that we can identify the required parts.
Yes. KONTECH can offer a SonFlow heat exchanger to replace an existing unit from another manufacturer. Where compatibility with the existing frame is confirmed, a SonFlow plate pack with gaskets may also be offered as an alternative to the original spare parts.
Send the make, model and serial number, a photo of the nameplate, front and side photographs, and the technical documentation if available.
The price depends on the selected model, number and material of the plates, gasket type and connections. The final price is stated in the quotation after technical selection based on the operating data.
The indicative delivery time is approximately four weeks. The delivery time for the selected configuration is confirmed in the quotation.
Request a Quotation
Describe what you need and send the information you have. If further details are required to prepare the quotation, we will contact you to confirm them.
The selected model, configuration, price, availability and delivery time are confirmed in the quotation.
Contacts
🏠 Service point address: Sofia 1700, Bulgaria