Expansionstank
Expansionstank is a term used to describe a pressure vessel designed to absorb the volume change of a liquid in a closed system due to temperature variation. In hydronic heating and cooling networks, liquids expand as they heat, and without an expansionstank the resulting pressure rise can stress pipes, valves, and safety devices. The expansionstank provides a compressible cushion to maintain safe, stable system pressure.
Construction and operation: Most expansionstanks consist of a steel shell divided by a bladder or diaphragm.
Variants and sizing: Bladder-type and diaphragm-type tanks are the most common forms. Some systems use a simple
Installation and maintenance: Expansionstanks are typically located on the supply or return line of the system.
See also: expansion vessel, pressure vessel. Expansionstanks are widely used in building services and industrial processes