It is a variation of the plate heat exchanger with removable gaskets. This is made up of a number of corrugated metal plates heat-welded together at a temperature above 900 ° C.
Copper solder.
The advantage of this type of exchangers is that in addition to being significantly smaller than the joint exchangers (which facilitates installation work and reduces the space required), there is no possibility of water leaking through the plates, with which considerably reduces maintenance costs.
DISADVANTAGES
Costly and difficult repair. You cannot change the number of plates as needed. Much shorter service life than removable plate heat exchangers, worse sanitation.
| Nº plates | Power | Primary | Secundary | Weight |
| 5 | 2 kw | 1.173 | 54 | 27 kg |
| 11 | 10 kw | 865 | 271 | 29 kg |
| 21 | 26 kw | 2.250 | 705 | 32 kg |
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