What is a expansion vessel on a heating system ? скачать в хорошем качестве

What is a expansion vessel on a heating system ?

What is an Expansion Vessel? Despite the fact that you may not have heard of an expansion vessel before, it’s a crucial part of your heating system that allows it to maintain a constant pressure. If you have a closed-water heating system in your home, such as a combi boiler, you will have an expansion vessel. Put simply, it acts as a kind of shock absorber, handling the expansion and contraction of water in your central heating system as it heats and cools. How does an expansion vessel work? The vessel, which will look a little something like the one pictured above, contains both air and water. Water from the central heating system fills one side and gas, usually nitrogen, fills the other. It’s a requirement in many closed-water heating systems because water expands as it heats up. If the extra volume of water didn’t have anywhere to go, the pressure in the system could rise to high levels, at which point the pressure relief valve would open to compensate. The expansion vessel gives the additional hot water a sort of overflow tank, that can help to bring the pressure in the system back to a normal level. Acting like a spring, the air that is present in the vessel compresses. In this way, it absorbs the extra pressure, helping to keep the system stable. There are different expansion tank designs, but the majority of newer boiler systems feature bladder type vessels. In these systems, the central heating water and compressed air are separated by a flexible membrane - or diaphragm. The vessel has a Schrader valve on the air side that allows for more air to be pumped in when necessary to maintain a suitable resistance to the expansion of the water. Email us here enquiries@trustboilers.com