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SonFlow SFB50 brazed plate heat exchanger
KONTECH Ltd. is the official distributor of SonFlow A/S and supplies SonFlow SFB50 brazed plate heat exchangers for HVAC, refrigeration, heat pump and industrial applications in Greece, Romania, Cyprus and other EU markets. The series includes model SFB51 with 2” connections and configuration according to operating parameters.
Brazed plate heat exchanger for HVAC, cooling and industrial systems
The SonFlow SFB50 series is part of the SonFlow product range of brazed plate heat exchangers and includes model SFB51. The model is intended for professional HVAC, refrigeration, heat pump, heating, cooling and industrial applications where compact construction, 2” connection and operation at specified parameters are important.
SFB50 is available in design pressure versions of 16 bar, 25 bar and 40 bar, with plate corrugation options TL, TM or TK according to the application. The specific configuration is determined according to temperatures, flow rates, allowable pressure drop and heat transfer requirements.
The construction is copper-brazed and without replaceable gaskets. The heat exchanger is built from corrugated stainless steel AISI 316 plates, vacuum-brazed with copper. The resulting plate pack provides a compact construction with a large heat transfer surface in relation to the overall dimensions of the unit.
Heat exchangers from the SFB50 series can be used both in new installations and for replacement of existing units. They are available with 2” pipe thread ISO 7-R, Ø42.2 pipe for brazing and NPT threads on request. The series includes different configurations depending on the number of plates, design pressure and plate corrugation options TL, TM or TK.
SonFlow SFB51 is a practical choice for replacing an existing brazed plate heat exchanger with 2” connections when the connection dimensions, overall dimensions and operating parameters of the system are compatible. Certain SFB51 configurations are available for fast delivery. Send an inquiry for confirmation of available configuration or delivery time.
SFB50 is part of the SonFlow range of brazed plate heat exchangers.
Why B2B clients choose the SonFlow SFB50 brazed plate heat exchanger
SonFlow SFB50 is selected by B2B clients, engineers and contractors for applications where compact size, 2” connections and the possibility to choose a configuration according to the operating parameters are important. Model SFB51 is a practical choice both for new systems and for replacement of existing heat exchangers when the technical parameters, overall dimensions and connections are compatible.
- SFB50 series with one main model: SFB51
- Copper-brazed construction without replaceable gaskets
- Stainless steel AISI 316 plates
- Brazing material: copper
- Design pressure 16, 25 or 40 bar
- Temperature range from -100°C to 185°C
- Plate corrugation options TL, TM or TK according to the application
- 2” pipe thread ISO 7-R
- Ø42.2 pipe for brazing
- NPT threads on request
For applications requiring a gasketed and serviceable construction, consider gasketed plate heat exchangers.
Typical applications of the SFB50 brazed plate heat exchanger
SonFlow SFB50 is used in systems where a compact brazed plate heat exchanger is required for heat transfer between clean fluids in HVAC, refrigeration, industrial and energy applications.
- District heating and cooling
- HVAC systems
- Refrigeration systems
- Industrial processes
- Marine systems
- Data centres
- Heat pumps
- Solar heating
- Oil cooling
- Replacement of an existing brazed plate heat exchanger
For fluids with solids, fibres, high viscosity or increased risk of clogging, it may be more suitable to consider Free Flow plate heat exchangers or another type of heat exchanger according to the application.
Do you have a project or a replacement case?
Send the operating parameters so we can prepare a proposal for a suitable configuration.
Main technical characteristics of SonFlow SFB50
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Copper-brazed plate heat exchanger
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Model in the series: SFB51
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Stainless steel AISI 316 plates
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Brazing material: copper
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Design pressure: 16, 25 or 40 bar
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Temperature range: from -100°C to 185°C
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Plate corrugation options TL, TM or TK according to the application
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2” pipe thread ISO 7-R
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Ø42.2 pipe for brazing
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NPT threads on request
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Compact construction without replaceable gaskets
The stated characteristics provide a basic technical framework for selecting an SFB51 configuration. The final technical selection depends on the fluids, flow rates, inlet and outlet temperatures, design pressure and allowable pressure drop for the specific application.
Quotation for SFB50 brazed plate heat exchanger
To prepare a proposal for a suitable SonFlow SFB50 brazed plate heat exchanger configuration, please send the main operating parameters of the application.
- Fluid on side 1 and side 2
- Flow rate on side 1 and side 2
- Inlet and outlet temperatures
- Heat duty, if known
- Working pressure
- Design pressure, if specified
- Allowable pressure drop, if specified
- Required connection type
- Information whether it is a new system or a replacement case
For replacement of an existing heat exchanger, it is useful to send a photo of the unit nameplate and information about the connection dimensions.
Technical drawing and main dimensions of SonFlow SFB51
Technical data for SFB51
| Parameter | Data |
| Heat exchanger type |
Brazed plate heat exchanger |
| Series |
SonFlow SFB50 |
| Model |
SFB51 |
| Construction |
Copper-brazed, gasket-free |
| Plate material |
Stainless steel AISI 316 |
| Brazing material |
Copper |
| Design pressure |
16 bar 25 bar 40 bar |
| Operating temperature range |
from -100°C to +185°C |
| Standards |
EN 13445, PED 2014/68/EU ASME Section VIII, Div. 1 |
| Connection options |
2” pipe thread ISO 7-R |
| Number of plates |
11, 15, 21, 31, 41, 51, 61, 71, 81, 91, 101, 111, 121, 131, 141, 151 |
| Dimension L1 |
L1 = number of plates x 2.5 + 11 mm |
| Main dimensions |
A: 618 mm (A = height) B: 191 mm (B = width) C: 519 mm (C = vertical centre-to-centre distance) D: 92 mm (D = horizontal centre-to-centre distance) E: 30 mm (E = connection length) |
| Accessories |
Insulation jackets Foundation feet |
The stated dimensions are according to the SFB51 technical drawing.
The technical data are based on SonFlow A/S product information last updated in November 2025. The manufacturer reserves the right to change the specifications without prior notice.
Certain SFB51 configurations are available from stock for fast shipment. Other variants are supplied on request. The specific configuration and delivery time are confirmed according to the technical parameters of the application.
Related SonFlow SFB models
Q&A: Frequently asked questions about SonFlow SFB50
What is SonFlow SFB50?
SonFlow SFB50 is a series of copper-brazed plate heat exchangers. The series includes model SFB51.
What is SFB50 used for?
SFB50 is used in HVAC, heating, cooling, refrigeration systems, heat pumps, industrial processes, data centres, marine systems and oil cooling.
What is the design pressure of SFB50?
SFB51 is available with design pressure of 16, 25 or 40 bar, depending on the specific configuration.
What is the temperature range?
The temperature range is from -100°C to 185°C.
What connections are available for SFB50?
The SFB50 series is available with 2” pipe thread ISO 7-R and Ø42.2 pipe for brazing, depending on the required connection type and system layout. NPT threads can be supplied on request when needed for the specific project or replacement case.
What plate corrugation options are available for SFB50?
SFB50 can be supplied with TL, TM or TK plate corrugations according to the application. The specific corrugation option is selected according to temperatures, flow rates, allowable pressure drop and heat transfer requirements.
How much does SonFlow SFB51 cost?
The price of the SonFlow SFB51 starts at EUR 591 excluding VAT. This indicative B2B price does not constitute a binding offer. The final price depends on the configuration and is confirmed after technical clarification.
Can SFB51 be sized by kW only?
No. Heat duty is an important parameter, but it is not sufficient for selecting a suitable configuration. Correct sizing also requires fluids, flow rates, inlet and outlet temperatures, working pressure, allowable pressure drop and connection type.
Is SFB50 suitable for dirty fluids?
SFB50 is not recommended for heavily contaminated fluids, solids or fibres. For such applications, a Free Flow plate heat exchanger or another type of heat exchanger may be more suitable according to the specific conditions.
Is SFB50 suitable for replacing another heat exchanger?
Yes, SFB50 may be suitable for replacement when the connections, dimensions and operating parameters are compatible. For verification, it is useful to send a photo of the unit nameplate and information about the connection dimensions.
What data are needed for a quotation?
Required data include fluids, flow rates, inlet and outlet temperatures, heat duty, working pressure, allowable pressure drop, connection type and application information.
Is SFB51 available for fast delivery?
Certain SFB51 configurations are available for fast delivery. Availability and delivery time are clarified according to the specific configuration.
Request a Quotation
Send the main technical parameters of your project to receive a quotation for SonFlow SFB51 brazed plate heat exchanger. Fill in the required details in the form below and click “Send”.
About SonFlow and KONTECH
KONTECH Ltd. is the official distributor of SonFlow A/S for plate heat exchangers.
SonFlow SFB50 is part of the product range of copper-brazed plate heat exchangers intended for professional HVAC, refrigeration, heat pump, heating, cooling and industrial applications.
KONTECH works with B2B clients in Bulgaria, Greece, Cyprus and Romania and provides quotations according to the submitted technical parameters. The specific configuration, availability and delivery time are clarified with the inquiry.
Heat exchange solutions from SonFlow A/S
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