EXPANSION VESSELS
ALTECNIC HEAD OF OEM SALES AND ROI MARK MOGEY EXPLORES THE ROLE OF A FLOW THROUGH EXPANSION VESSEL IN PREVENTING HARMFUL BACTERIA BUILD UP IN POTABLE WATER SYSTEMS…
Flow through expansion vessel.
FLOWJET
All you need to know about flow through expansion vessels
Any increase in volume, created by an increase in temperature, has to be accommodated by an expansion vessel.
T-PIECE
HOW DO FLOW THROUGH VESSELS WORK? In a closed hot water circuit, the water cannot be compressed so any increase in volume, created by an increase in temperature, has to be accommodated by an expansion vessel. When water is cold, the pre-charge pressure forces the bladder to collapse until the pump is started when the bladder starts to inflate. As the temperature in the system increases, with the associated increase in pressure and volume, the expanded water enters the bladder creating additional volume and lowering the pressure. When the temperature decreases, the pre-charge
HOW DO FLOW THROUGH VESSELS HELP TO PREVENT LEGIONELLA & PSEUDOMONAS? When fitted with the PVACC Flowjet valve, the vessel is anti-Legionella, which further assists in the constant movement of water in the vessel to prevent stagnation. The PVACC Flowjet valve is supplied as an optional component with an Altecnic Reflex flow through vessel. WHERE ARE FLOW THROUGH EXPANSION VESSELS INSTALLED? Flow through expansion vessels are typically installed in potable hot water systems where there is a legal or practical requirement to minimise the risk of waterborne bacteria. Unlike standard
Whilst a flow through vessel can be used effectively on any potable water system, they are particularly useful in healthcare, education, hotel, hospitality and other public use settings. WHAT IS A FLOW THROUGH EXPANSION VESSEL? Flow through expansion vessels are designed to keep potable water moving
through a system in order to prevent any stagnation or contamination. The innovative design
encourages flushing through the vessel,
greatly reducing the opportunity for clusters to form.
pressure forces the water from the bladder and back into the main water circuit.
Mark Mogey, Head of OEM Sales UK and ROI, Altecnic.
“Flow through expansion vessels are designed to keep potable water moving through a system in order to prevent any stagnation.”
86 | PLUMBING & HEATING MAGAZINE
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