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HVAC: expansion

  • Selection of compensators HVAC, for thermal expansion at medium temperature under 100°C
  • General:
  • In the buiding industry many pipelines with varying medium temperatures are being used.
  • Temperature ranges 90-70 or 6-12 or 50-30 are known values. And the installation temperature
  • during winter can go as low as 5°C. This way a temperature difference in the metal of the pipeline
  • in HVAC installations can easily go up to 90°C.
  • Because of the temperature differences the pipe will elongate and shrink giving length variations.
  • One of the possibilities to compensate for these changes is to install compensators
  • also called expansion joints.
  • One will find these expansion joints in pipelines in shafts, walkways, corridors and basements.
  • Solution with axial compensators:
  • During the design of the installation as well as during the mounting of pipelines, brackets and sliding and
  • fixed points, forces due to pressure thrust and springrates come into play.
  • Especially when using axial expansion joints considerable forces will act on fixed points and
  • bracketry when the pipeline is put on pressure.
  • Solution with lateral / angular compensators:
  • To reduce the influence of pressure thrust tied lateral or angular compensators can be used,
  • however pipeline configuration is to be examined closely. Consult us for advise!
  • Selection axial compensators:
  • - DN 20 - DN 50 with threaded ends
    : Kledil® rubber quality CCKledil CC
  • - DN 32 - DN 450 with flanges
    : Dilatoflex® series T rubber quality CCDilatoflex T CC

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