Brazed plate heat exchangers
Model B
Brazed plate heat exchanger suitable for domestic hot water, evaporators, condensers and economizers. Available from 6 to 60 plates, compact and easy to install, with 1” connections.
→ Specifications
Compact, up to 60 plates.
Model B is a brazed plate heat exchanger made of corrugated stainless steel plates, vacuum-brazed with copper into a single sealed block. Compact and easy to install, with 1” connections, from domestic hot water to ground-source heat pump evaporators.
Tech specs
| Parameter | Value |
|---|---|
| Max. number of plates | 60 |
| Volume per channel | 0.055 litres |
| Max. flow rate | 6.1 m³/h |
| Operating temperature | −196 / +200 °C |
| Chevron angles | H |
| Heat exchange area | (n−2) × 0.030 m² |
Operating pressures and applications
| Series | Application | Pressure |
|---|---|---|
| DM1 | Water-water (DHW) | 16 bar |
| DM2 | Water-water (DHW) | 31 bar |
| DS2 | Steam-water | 31 bar |
| DBE2 | Evaporator (Chillers | Ground Source HP) | 31 bar |
| DBC2 | Condenser (Economizer) | 31 bar |
| DBE3 | Evaporator (Chillers | Ground Source HP) | 45 / 49 bar |
| DBC3 | Condenser (Economizer) | 45 / 49 bar |
Materials and construction
| Feature | Detail |
|---|---|
| Plates | Stainless steel AISI 316L / 304, corrugated |
| Brazing | Copper (Cu 99.9%), vacuum furnace |
| Sealing | Gasket-free, hermetically sealed block |
| Connection size | 22 mm (1”) |
| Connection types | Threaded (standard), soldered, inner threaded, welded, Victaulic® |
| Accessories | Brackets, stud bolts, adapters, polyurethane insulation shells (on request) |
| Evaporator distributor | Flexible distribution system, customisable to the application |
| Production | Polidoro Group, Schio (Italy) |
→ Plate geometry
High chevron angle, high heat transfer.
Model B is built with H-type plates. The high chevron angle creates more turbulence and a higher heat transfer coefficient: the right choice when the required approach is tight (<3 K).
The trade-off is a higher pressure drop than low-angle plates, which is why every heat exchanger is configured on your operating point.
Chevron H
High heat transfer
→ Dimensions
Sizes and weights.
| Ref. | Dimension | Value |
|---|---|---|
| A | Height | 325 mm |
| B | Width | 90 mm |
| C | Height hole distance | 279 mm |
| D | Width hole distance | 43 mm |
| E | Depth | 9.33 + 2.14·n mm (DM1 | DM2 | DBE2 | DBC2) 13.88 + 2.23·n mm (DBE3 | DBC3) |
| F | Connectors | 22 mm |
| — | Weight | 1.167 + 0.088·n kg (DM1 | DM2 | DBE2 | DBC2) 2.159 + 0.097·n kg (DBE3 | DBC3) |
| — | Heat exchange area | (n−2) × 0.030 m² |
→ Applications
Where Model B works.
The applications this heat exchanger is used in. Each one has its own page, with design data, functions and applicable series.
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HVAC
Evaporators, condensers and economizers for chillers, heat pumps and boilers.
-
Industrial Cooling
Hydraulic oils, cutting emulsions, process circuits and steam.
→ Why Davhex
Thermal expertise, made in Italy.
Davhex is the heat exchanger division of Polidoro Group, a supplier of thermal components to OEM manufacturers.
of experience in thermal components within Polidoro Group.
In-house test rooms, CFD/FEM simulation and co-development with OEM customers.
A dedicated line for prototypes and small batches, without slowing series production.
Produced in Schio (Vicenza), Italy, with vacuum brazing furnaces and leak-test stations.
→ FAQ
Frequently asked questions.
Quick answers on Model B, from construction and connections to sizing and sampling.
What is a brazed plate heat exchanger?
A compact heat exchanger made of corrugated stainless steel plates (AISI 316L / 304) brazed together with copper (Cu 99.9%) in a vacuum furnace. The result is a single hermetically sealed block, with no gaskets.
How many plates does Model B have, and how do I choose?
Model B is available from 6 to 60 plates. The right number depends on the power, temperatures and allowable pressure drop of your application: send us your operating data and our technical team will size the heat exchanger.
What is the difference between the series?
DM is for water-water duties (domestic hot water); DBE is the evaporator version and DBC the condenser version; DS is the steam-water version. The number indicates the pressure class: 1 = 16 bar, 2 = 31 bar, 3 = 45 bar at 135 °C / 49 bar at 110 °C.
What is Model B used for?
Domestic hot water, chiller and ground-source heat pump evaporators, condensers, economizers and suction gas heat exchangers, and steam duties.
What are the operating limits?
Operating temperature from −196 to +200 °C. Maximum pressure from 16 bar (DM1) to 45 bar at 135 °C / 49 bar at 110 °C (DBE3 and DBC3), depending on the series.
Can I request a sample?
Yes. Polidoro runs a dedicated line for samples and small batches, so prototypes can be supplied without waiting for series production. Use the contact form below.
Which connection types and accessories are available?
Connections are threaded as standard; soldered, inner threaded, welded and Victaulic® versions are also available. On request we supply brackets, stud bolts, adapters and polyurethane insulation shells.
How do I size the heat exchanger?
Use the Davhex selection software, available on davhex.com after licence activation: it gives the optimal sizing for your project. For dedicated versions or custom distributors, our technical team can run specific tests.
→ Related models
Compare the range.
Other Davhex brazed plate heat exchangers for similar duties.
Contact us for more information
If you are looking for more information about our products, please fill the contact form below and send us your request.