Flexcon premium 2 nz
Flexcon premium 1
Flexcon premium 3
Flexcon Premium diaphragm
Flexcon premium 2 nz
Flexcon premium 1
Flexcon premium 3
Flexcon Premium diaphragm
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For Heating & Cooling Installations (Types 8 - 35)

Sustainable expansion vessels for sealed heating installations and chilled water (cooling) installations.

  • Maximum working pressure: 3.0 bar
  • Suitable for systems with a maximum system temperature of 120 °C
  • Min./ max. temperature diaphragm: -10 / 70 °C
  • Suitable for addition of glycol-based anti-freeze up to 50%

Home Heating/CoolingPlumbing and HVAC

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View the complete range of premium expansion vessels on our product portal

  • Sustainable expansion vessels thanks to innovative technology.
  • The Flexcon Premium expansion vessels have a plastic membrane (12 - 35 litres) made of thermoplastic polyolefin (TPO). The new membrane has a high flexibility and low permeability. The environmental performance of the new membrane is much better and TPO can be burned cleaner or recycled into products more effectivly.
  • The plastic membrane is much lighter because it requires up to 50% less material. This saves raw materials, energy (production) and fuel (transport) and results in a large reduction of CO2 emissions.
  • The box is made from FSC certified cardboard and the version with the lowest available CO2 footprint has been selected. The manual is printed on FSC certified paper.
  • A long service life is guaranteed with a 15-year warranty and therefore also saves on maintenance.
  • Extremely low permeability of the diaphragm ensures that pre-charge pressure is maintained for longer.
  • The flexible diaphragms, with rolling action, are preformed and, in contrast to a bag type bladder, prevent stretching so that their properties are preserved over the long term.
  • The two halves of the vessel are coated prior to assembly, not afterwards. Therefore there is no risk of corrosion on the clamp ring and the diaphragm does not have a service life-reducing thermal shock during production.
  • The unique zinc plated steel clench ring construction clamps the diaphragm between the two deep drawn steel vessel halves. This not only ensures a perfect seal but also prevents mechanical damage of the diaphragm during use (load distribution over the entire clamping area and not at 1 central suspension point).
  • The gas side is filled with nitrogen, and not with air, so that corrosion is prevented and the pressure loss is even more limited.
  • The nitrogen air valve is countersunk on the vessel to protect it from damage, it is in turn further protected by a cover plate from recycled plastic.
  • The profile on the diaphragm prevents it from sticking to the inside wall of the vessel and ensures inflow of expansion water at the earliest increase in pressure.
  • The uncoated taper water connection thread ensures easy and water tight installation.
  • Finished with a gleaming epoxy-powder coating.
  • Each vessel is functionally tested before it leaves the factory.