tech info


Open expansion tanks are used as safety accessories in the heating systems
where, due to legal reason it is forbidden to install closed expansion tank
systems. In Italy, for the water fireplaces, they are still one of the most simple
and economic solutions. Expansion tank is composed by a cover unit where all
the security piping of outlet pipe for too full , supplying and systems charge ,
should arrive. Its rule is to merge the water in excess caused by temperature
increase. Expansion Tank should be placed on the highest point reached by the
water and should have an expanding volume not less than the expansion volume
developed by all the water contained in the system , whose value should be
declared in the project.

Expansion volume needed in the system is calculated by the following formula:
“Ve = C x e”
Where C is the water contained in the system and “e” is equal to the difference
between the expansion factor of the water at the minimum conceivable
temperature with sleeping system and the expansion factor of the water at
boiling temperature of atmospheric pressure. Considering the first water
temperature equal to 10°C and the boiling one at 100°C
“e” = 0.0431
It is possible to connect more than one tank together.

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