Solar Expansion Vessel

Do i need an expansion vessel in my solar system.

Solar expansion vessel.

An expansion vessel must ensure the solar system can work safely particularly during periods when hot water is not being drawn off. Altecnic s range of solar expansion vessels are specifically designed for renewables applications where high temperatures can normally be reached and where depending on the kind of system glycol can be present. An expansion vessel consists of a trapped volume of pressurised air gas inside a steel vessel which contains a rubber bag or diaphragm. Our solar expansion vessels are rated for a system operation temperature up to 120oc.

The solar expansion tanks has a rubber membrane which separates the solar liquid loop and the other side is filled with pressurized air. As the liquid heats up and expands the pressure of the system increase to an amount greater than the air pressure inside the expansion vessel and causes the membrane to take up more liquid to the air side. The expansion vessel in a solar hot water system has to be able to operate at higher temperatures than those a standard heating vessel are subjected to. Eco expansion vessel for solar heating systems.

Solar expansion vessels need to be sized correctly for your system. Expansion vessels are an important part and safety device of your solar hot water system. Most commonly expansion vessels are 18l or 25l in volume but we have serviced and installed much larger vessels.