Modern solar heating systems can reach temperatures of up to 385°F during inactivity.
The result is the vaporization of the solar liquid and extreme temperatures in the
solar circuit, up to the solar station. This damages parts of the system, including pumps,
connection joints and the diaphragm in the expansion tank. Furthermore, in the event of
prolonged heat absorption, for example in the summer, when on vacation or if the electricity
is out, the pressure of the solar systen can increase to the point of activating the safety
relief valve. In order to support the highest possible inactivity temperatures, the special
heat-resistant diaphragm in the SolarPlus expansion tank can withstand temperatures up to 210°F.
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