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Grundfos Heating Expansion Vessels

Grundfos GT expansion vessels ensure long, maintenance-free, reliable and controlled operation, tanks can be integrated in many different systems with a wide variety of pumps. The large number of tank sizes and types available makes it possible to select the pressure tank that best suits the application and system in question.

Typical applications:

  • domestic-heating and chilled-water systems
  • commercial-building heating and chilled-water systems
  • industrial-heating and chilled-water systems.

The GT-HR expansion vessels are available in sizes ranging from 8 to 1000 litres and are suitable for vertical installation.
The tanks have a non-replaceable diaphragm that is pre-charged with nitrogen (1.5 bar).
The tanks have a non-toxic butyl rubber diaphragm, dividing the tank chamber into two compartments.
The upper compartment contains compressed nitrogen. The lower compartment has a liner of polypropylene (PP) and is filled with water from the pump.


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