Extensive tanks are devices in the heating circuit that ensure compensation for excess water volume formed due to its temperature expansion. When the boiler is heated every 10 degrees, the volume of water increases by approximately 0, 3%. Since the water does not compress, the excess fluid must be drained. For draining excess water and an expansion tank serves.
The most popular type of expansion tank is a membrane tank. They are used in small heating systems, so they are very common in apartment heating. Thanks to the membrane, they can perform the functions of not only an expansion tank, but also maintain minimal pressure in the system. Tanks are made of high -quality steel. The outer surface of the tank is enameled. The inner side in contact with water is covered with epoxy moisture -resistant paint. In the starting position, the entire tank is filled with air.