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It is well known that water can not be compressed

Taking that as a princible, the volume of the system's water increases along with the temperature increase in the closed circuit heating & cooling systems. As the increasing water volume can not be compressed, the excess of the water has to be compansated into the closed curcuit system. For this reason, the most common way to compensate the excess of the water is to add an expansion tank to the system.

When comparing, Bestank heating series expansions vessels in use at closed circuit system to open circuit systems, the expansions vessels provide great advantages to the system:

• The outside going water has to be added back into the system each time in the open circuit systems.
• Corrosion is quite possible in open circuit systems because of the oxygen penetrating into the system.
• The installantion of the expansion vessels is much easier than the open circuit systems.
Tank Metal Body
  • Interchangable membrane due to screw connection flange cover at the bottom of the tank
  • Flange cover and water connector made of carbon steel material
  • Resistant up to 10/16/25 bars
  • Outer surface with epoxy powder paint
  • All tanks CE 97/23 Certified
  • High quality membranes according to European Standarts
  • Suitable for use -20°C/+100°C working temperature
  • Suitable for use with Ethylene-or Propylene-Glycolic mixtures
  • DIN 4807-3 certified
  • Option: Butly membranes available upon request
Orginal Colour : Red - RAL 3020 RAL 3020