Pressure expansion vessels 400 l

Membrane Pressure expansion vessel for heatin systems.

Volume 400 l

Size: Diameter 630mm x H 1450mm

connection 3/4

Pre-charge 2,5 BAR

Max. pressure 6 BAR

long service life

no contact of water with the steel body

CE Certificate

reduced heat loss from a hot-water tank

saving water

safe and reliable heating system thanks to overpressure compensation

100% quality tested

pre-charge instructions on a cardboard

side outlet for compressor (as ventil from car pneu) it is for air bleeding or pumping the pressure up, it can pressure it by standard air pump or for bigger volumes use compressor Pressure expansion vessels are used to compensate fluctuations in fluid volume caused by temperature fluctuations and to keep the system pressure within the working limits. They are used in heating systems, solar systems and circuits of potable water used with storage water heaters. The vessels are made of welded high-quality deep-drawing steel and finished with anticorrosion surface treatment in color corresponding to the vessel type.
A diaphragm divides the steel vessel into two sections, one containing gas and the other heat-transfer fluid. When the fluid is cold, almost the entire volume of the expansion vessel is filled with gas. As the fluid temperature rises, its volume grows and the fluid enters the expansion vessel and compresses the gas in the other section. When the heat-transfer fluid cools down, the gas presses it out of the expansion vessel again.