What is the function of an expansion tank and where is it installed?

An expansion tank is a device used to maintain stable water pressure in heating systems. It can buffer changes in water pressure, thereby protecting pipes and other equipment from excessive or low water pressure. The expansion tank is usually connected to the heating system via pipes. When water is heated in a system, it expands and increases the water pressure. At this point, the air in the expansion tank is compressed, increasing the pressure inside the tank. As the water temperature drops and the water contracts, the pressure in the expansion tank decreases, allowing air to be released into the system thereby maintaining stable water pressure. Installing an expansion tank within a heat exchange unit is a common practice. It is best to install the expansion tank at the highest point of the heating circulation piping system in order to better mitigate changes in water pressure. This ensures that all parts of the system are protected by the expansion tank. .

Expansion tank……It seems that the correct term for it is accumulator; I’m not sure if that’s correct, but this is just for reference. If it is for energy storage and the water tank is at constant pressure, it should be placed above the water-using equipment, taking advantage of its higher position to meet urgent needs. If the tank is a pressure vessel with a pressure higher than atmospheric pressure, then there are no specific requirements regarding its installation height; it only needs to be able to supply pressurized water when needed. For reference.

An expansion tank is a device used to maintain stable water pressure in heating systems. It can buffer changes in water pressure, thereby protecting pipes and other equipment from excessive or low water pressure. The expansion tank is usually connected to the heating system via pipes. When water is heated in a system, it expands and increases the water pressure. At this point, the air in the expansion tank is compressed, increasing the pressure inside the tank. As the water temperature drops and the water contracts, the pressure in the expansion tank decreases, allowing air to be released into the system thereby maintaining stable water pressure. Installing an expansion tank within a heat exchange unit is a common practice. It is best to install the expansion tank at the highest point of the heating circulation piping system in order to better mitigate changes in water pressure. This ensures that all parts of the system are protected by the expansion tank.

This post was last edited by wanlirn on 2023-6-20 at 15:29. Expansion tank: You’re referring to the expansion vessel, which is installed at the outlet of the make-up water pump

Yes, but our company’s unified name is expansion tank

Some air conditioning systems also have expansion tanks; otherwise, there will be confusion. Expansion tanks or pressure tanks are both conventional terms

The open system, which operates without pressure, is placed at the highest point of the entire system, while the closed system, which operates under pressure, is located near the return water inlet of the water pump. Open systems are quite rare nowadays