Brazed plate heat exchangers
Model AB
The plug & play heat exchanger: dimensions interchangeable with the most used heat exchangers on the market, for heating interface units, substations, domestic hot water and small heat pumps.
→ Main features
Plug & play, drop-in ready.
Engineered for immediate integration: dimensions interchangeable with the most used heat exchangers on the market. Modular range from 6 to 60 plates, for water/water and water/refrigerant duties.
Designed for seamless integration
Drop-in replacement: dimensions interchangeable with the most used heat exchangers on the market.
Optimized asymmetric plate geometry
Symmetrical and asymmetrical channels for single-phase or two-phase applications, with high thermal efficiency and optimized pressure drop.
Exclusive, flexible distribution system
Adaptable to different refrigerants and heat fluxes. Surface treatments, distribution system and materials are under development.
→ Specifications
Compact, up to 60 plates.
Brazed plate heat exchanger with 6 to 60 plates, for heating interface units, domestic hot water and small heat pumps.
Tech specs
| Parameter | Value |
|---|---|
| Max. number of plates | 60 |
| Volume per channel | 0.021 – 0.04 litres |
| Operating temperature | −196 / +150 °C |
| Chevron angles | Asymmetric, High or Asymmetric/High |
| Heat exchange area | (n−2) × 0.029 m² |
| Max. allowable pressure at 110 °C | 49 bar |
Series and applications
| Series | Application | Note |
|---|---|---|
| DM1 | DM2 | DS2 | Water-water (DHW | heating interface units | substations) | See max pressure |
| DBE2 | DBE3 | Evaporator (small heat pumps < 8 kW) | See max pressure |
| DBC2 | DBC3 | Condenser (small heat pumps < 8 kW) | See max pressure |
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 | 20 mm |
| 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) |
→ Dimensions
Sizes and weights.
| Ref. | Dimension | Value |
|---|---|---|
| A | Height | 315 – 318 mm |
| B | Width | 74 – 76 mm |
| C | Height hole distance | 278 mm |
| D | Width hole distance | 40 mm |
| E | Depth | DM1 | DM2 | DS2 — H: 9 + 2.24·(n−2) mm · AH: 9.2 + 2.1·(n−2) mm · A: 9.1 + 1.32·(n−2) mm DBE2 | DBC2 | DBE3 | DBC3 — H: 11 + 2.24·n mm · AH: 11.2 + 2.1·n mm · A: 11.1 + 1.32·n mm |
| F | Connectors | 20 mm |
| — | Weight | 0.5 + 0.059·(n−2) kg / 0.9 + 0.059·(n−2) kg |
| — | Heat exchange area | (n−2) × 0.029 m² |
→ Applications
Where Model AB 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.
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Refrigeration
Compact, lightweight heat exchangers for trucks, semi-trailers and containers.
→ 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 AB, 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.
What does plug & play mean for Model AB?
Model AB has a format designed to be dimensionally interchangeable with the most used heat exchangers for domestic hot water modules and economizers, so it can be installed without redesigning the system. Performance in your application should always be verified with our technical team.
How many plates does Model AB have, and how do I choose?
Model AB 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, heating interface units, substations); DBE is the evaporator version and DBC the condenser version for small heat pumps; 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 are the operating limits?
Operating temperature from −196 to +150 °C. Maximum pressure 49 bar at 110 °C (45 bar at 135 °C), 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.