The VXT-2 is a closed cylindrical expansion tank suitable for connection only to the closed circuit of the solar water heater. At the bottom it has a thread for connection to the tank of the solar water heater and at the top it has a place for installing a 1.5 bar safety valve
Modern solar thermal systems develop high temperatures causing their liquids to expand and evaporate. This creates an increase in pressure in both circuits of the device resulting in strain on the entire system.
In addition, the grid pressure together with the dynamic energy of the water cause hydraulic shocks to the device, which can cause temporary or permanent damage.
