Potable Water Expansion Vessels

Potable Water Expansion Vessels in range of sizes

Key features:
  • Expansion Vessels designed for Potable Water
  • Operates between -10°C and +100°C
  • Removes requirements of continuous pump
  • Keeps water contaminant free
From €30.00
Delivery in
2-3 Days
SKU
EV2LP-x
Brand
My Building Supplies

These Potable Expansion Vessels are built from different materials than our Red Heating Expansion Vessels to ensure that the water is contaminant free and safe for human consumption.

The most common use for an expansion vessel in a potable application would be in an Unvented Water Heater or a Pumped System.

Expansion Vessels operate on the basis that the internal chamber is separated by a rubber membrane, inside this membrane sits the water and surrounding this sits a pocket of air.

As the water inside the sealed system is pressurised, as water is non compressible, the air inside the air chamber of the Expansion Vessel will become compressed thus leaving the system safe from over pressurisation.

Expansion Vessels are commonly used on pumped systems to remove the requirements of a continuous pump.

This works as the user will set a low and high pressure on the pump settings, when the water pressure reaches the lowest setting the pump will engage and fill the Expansion Vessel to the high pressure point and stop.

Once this cycle has been completed the Expansion Vessel puts the stored water under pressure ensuring higher pressure water.

This will continue until the Expansion Vessels pressure drops to the lower point and the pump starts its cycle again.

  • Specifically for potable water
  • Operates between -10°C and +100°C
  • Keeps water contaminant free
  • Removes requirements of continuous pump
  • Max working pressure of 10 bar
  • You can see the Product Data sheet here

The expansion vessels are manufactured to meet the requirements of PED 97/23/EC Directive and BS EN 13831:2007 ‘Closed expansion vessels with built in bladder for installation in water’.

Design

Manufactured in carbon steel with a two or three part weld construction.

Pre-pressurised air chamber with synthetic rubber compound bladder.

Sizes 60 to 1000 litres (except 140 litres) have a replaceable bladder.

The internal surfaces of the vessel in contact with the water are coated against corrosion.

External surfaces have a blue durable powder coated finish.

Suitable for temperatures up to 70˚C, resistant to ethylene or propylene glycol mixtures and has low gas permeability.

Altecnic expansion vessels are all tested according to the Pressure Systems Directive.