Vertical Floor-standing Heating Expansion Vessel With Pressure Gauge

The floor standing expansion vessel absorbs the thermal expansion of water in closed heating systems, keeping system pressure within its working range, in volumes from 100 L to 5000 L at a maximum operating pressure of 10 bar. It conforms to EN 13831, has a replaceable EPDM membrane, is shipped pre-charged with nitrogen and fitted with a pressure gauge, and stands on its own legs.

The floor standing expansion vessel from the Eternal line takes up the extra water volume created as a closed heating circuit warms up, so that system pressure stays within its working range and the safety valve is not called on in normal operation. It is available in nominal volumes from 100 L to 5000 L, finished in red, and conforms to EN 13831 with a maximum operating pressure of 10 bar. Inside the vessel, an EPDM membrane of Italian origin separates the system water from the gas cushion. The membrane is replaceable, so it can be renewed during servicing without changing the whole vessel. The vessel is shipped pre-charged with nitrogen, and a pressure gauge is fitted, so pre-charge and system pressure can be checked on site without extra instruments. This size of vessel is chosen for larger heating systems: boiler rooms in apartment blocks and commercial or public buildings, district heating substations, and heat pump or biomass installations where buffer tanks increase the water volume. Where one vessel is not enough, several can be connected to the same system. The vessel stands upright on its own legs, so no wall bracket or separate mounting frame is needed. It is normally connected on the return, close to the suction side of the circulating pump, with space left for reading the gauge and servicing the membrane. Besides the standard connection, the vessel can be supplied with other connection sizes on request. Before filling, a qualified installer sets the pre-charge to the system design.