Brazed Plate Heat Exchangers | SonFlow

Name: Brazed Plate Heat Exchangers | SonFlow
Brand: SonFlow
SKU: Brazed Plate Heat Exchangers | SonFlow

SonFlow SFB Brazed Plate Heat Exchangers

SonFlow SFB units are permanently sealed plate heat exchangers without gaskets. The assembly consists of corrugated AISI 316 plates and copper foil, fused through vacuum brazing to form a unified heat exchange body.

Technical Specifications

Plate Material: AISI 316
Brazing Material: Copper
Design Pressure: 25 or 40 bar, depending on version
Temperature Range: -100 to 185 °C
Connections: from ¾” to DN100
Construction Standard: EN 13445 / PED 2014/68/EU in selected series

Series and Size Selection

The series includes SFB21, SFB22, SFB31, SFB32, SFB51, SFB61, SFB81, and SFB101. Selection is based on thermal load, flow rates, allowable pressure drop, temperature approach, number of plates, and connection type. Smaller series use ISO7-R threads or brazing pipes, while SFB81 and SFB101 are available with flanged connections DN80/DN100.

Applications

Suitable for water, water/glycol circuits, and refrigeration applications where a compact exchanger is required without periodic disassembly:

HVAC, heat pumps, and solar heating
Refrigeration and industrial cooling
Data centers and process cooling
Marine cooling and general process heating/cooling

Operation and Maintenance

Gasket-free construction reduces potential external leakage points but does not allow unit opening for mechanical cleaning. For fluids with particles, salts, or high fouling, filters, proper flow velocity, and provision for CIP or chemical cleaning are required.

Temperature Control

The exchanger does not include an actuator. Control is achieved via an external control valve, three-way valve, pump inverter, or PLC/BMS, with temperature sensors on supply and return.

FAQ

When to choose SFB over gasketed exchangers?
When a compact, sealed construction is needed without frequent opening for cleaning.

What should be checked before selection?
Copper compatibility with fluid, chlorides, pH, temperatures, pressure, fouling, and available pressure drop.

Datasheet and documents

Description

Permanently Sealed

Brazed Heat Exchangers

SonFlow’s new efficient brazed heat exchangers (SFB) are permanently sealed heat exchangers suitable for a wide variety of applications across numerous market segments.

For the brazed heat exchanger series, the key focus lies in reliability and high performance. Our talented team with more than 40 years of experience in heat exchangers has developed and thoroughly tested the efficient brazed heat exchangers, handling advanced heat transfer technology.

Features

Every detail is carefully designed to ensure optimal performance, reduce maintenance costs, and decrease downtime.

One of our focus areas is sustainability and therefore it is important that the units are energy-efficient and environmentally friendly.

Construction

The Brazed heat exchanger is constructed by a package of thin corrugated metal plates, surrounded by two thicker stabilizing plates. A thin copper foil placed between each of the thin metal plates melts and seals the brazed plate heat exchanger during a vacuum brazing process.

We calculate each solution based on the customer’s requirements to ensure an ideal pressure drop and flow rate. And at the same time, the unit becomes energy-efficient and environmentally friendly. Based on the individual task, we also determine the number of plates and the size of the brazed heat exchangers.

Plates

The design of the corrugated plates optimizes heat transfer by providing a large but compact total surface area whereby the heat can be drawn from one liquid or gas to another.

The plates are optimised to meet specific temperature demands and capacities.

Designed to meet your needs

Our extensive range ensures that we can offer the best solution at the best price and, if required, combine several different types of heat exchangers to ensure that you get the best possible solution.