Brazed plate heat exchangers
Model D
Brazed plate heat exchanger suitable for domestic hot water, data centers, heat pumps, evaporators, economizers, condensers and desuperheaters. Available from 10 to 200 plates, with 1” ¼ connections.
→ Specifications
Compact, up to 200 plates.
Model D is a brazed plate heat exchanger made of corrugated stainless steel plates, vacuum-brazed with copper into a single sealed block. With 10 to 200 plates and 1” ¼ connections, it covers domestic hot water, data centers, heat pumps, chillers and desuperheating.
Tech specs
| Parameter | Value |
|---|---|
| Max. number of plates | 200 |
| Volume per channel | 0.082 litres |
| Max. flow rate | 15 m³/h |
| Operating temperature | −196 / +200 °C |
| Max. allowable pressure at 200 °C | 31 bar |
| Chevron angles | L – M – H |
| Heat exchange area | (n−2) × 0.044 m² |
Operating pressures and applications
| Series | Application | Pressure |
|---|---|---|
| DM1 | Water-water (DHW | District Heating | Data Center) | 16 bar |
| DM2 | Water-water (DHW | District Heating | Data Center) | 31 bar |
| DS2 | Steam-water | 31 bar |
| DBE2 | Evaporator (Chillers | Ground Source HP) | 31 bar |
| DBC2 | Condenser (Economizer | Desuperheater) | 31 bar |
| DBE3 | Evaporator (Chillers | Ground Source HP) | 45 / 49 bar |
| DBC3 | Condenser (Economizer | Desuperheater) | 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 | 27 mm (1” ¼) |
| 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
Chevron angles, tuned to your duty.
Model D is available with L, M, H plates. L: low chevron angle, the lowest pressure drop, for high flow rates or limited pump head. M: mixed geometry, a balance between heat transfer and pressure drop. H: high chevron angle, more turbulence and the highest heat transfer coefficient, for tight approach temperatures (<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 L
Low pressure drop
Chevron M
Balanced performance
Chevron H
High heat transfer
→ Dimensions
Sizes and weights.
| Ref. | Dimension | Value |
|---|---|---|
| A | Height | 380 mm |
| B | Width | 123 mm |
| C | Height hole distance | 320 mm |
| D | Width hole distance | 64 mm |
| E | Depth | 12.32 + 2.17·n mm (DM1 | DM2 | DBE2 | DBC2) 16.61 + 2.19·n mm (DBE3 | DBC3) |
| F | Connectors | 27 mm |
| — | Weight | 2.154 + 0.136·n kg (DM1 | DM2 | DBE2 | DBC2) 3.706 + 0.155·n kg (DBE3 | DBC3) |
| — | Heat exchange area | (n−2) × 0.044 m² |
→ Applications
Where Model D works.
The applications this heat exchanger is used in. Each one has its own page, with design data, functions and applicable series.
-
Data Center
Brazed plate heat exchangers for CDUs, liquid cooling and heat recovery.
-
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 D, 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 D have, and how do I choose?
Model D is available from 10 to 200 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, district heating, data centers); DBE is the evaporator version and DBC the condenser version (also used as desuperheater); 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.
Is Model D suitable for data centers?
Yes. Model D is listed for data center CDUs, as well as domestic hot water, district heating substations, chillers, heat pumps, economizers, desuperheaters, steam and oil cooling.
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.