Expansion Vessels is specifically designed for Unvented Systems when used as part of an additional piece of technology. The purpose of these vessels is to accommodate the increased liquid volume which occurs during system heating in an Unvented Circuit. A pressurised membrane allows ingress/egress of the liquid only during periods of heating / cooling.
The correct size of vessel must be considered prior to installation and installed by appropriately trained engineers.
The Expansion Vessel may be fitted to a very wide range of devices, thanks to the huge range of shapes, capacities and connection types available. Several potable vessels are also available within the range. The orientation of the expansion vessels water connection should be considered at the design stage as different options are available on request for connection size, location and type.
