Pressure & Expansion Vessels

Pressure & Expansion Vessels

Pumps UK LTD can provide WRAS Approved high quality steel expansion tanks and pressure vessels across a range of sizes and manufactures. The vessels are designed for heating and chilled water expansion and as draw down vessels on cold water systems.

Our range includes:

Pressure vessel is a closed container made to hold liquids at a pressure different from that of normal ambient pressure. For use in pressure boosting and boiler systems. The vessels have a membrane or diaphragm that is pressurised by an air charge. The water expands against this void. Normally the vessels air charge is equal to the fill pressure of the system before the boiler is turned on. The vessel will start to take expansion when the water starts to heat up.  If vessel sizing or air charge is is incorrect the system will over expand and lift the safety valve in the system. On booster pump systems the vessel charge should be .2 Bar below the cut in pressure of the pump. If the pressure is not correct the pumps will hunt and cause fluctuation in the system.

For more information on any of the expansion tanks we have to offer please contact the office or fill out our online quotation form.


  • Reflex Vessels

    Reflex Vessels

  • Zilmet Vessels

    Zilmet Vessels

  • Varem Vessels

    Varem Vessels

  • Cimm Vessels

    Cimm Vessels

  • Lowara Vessels

    Lowara Vessels

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  1. Cimm AFE CE 1500 Litre Vertical
  2. Cimm AFE CE 50 Litre Vertical
  3. Cimm ACS CE 24 Litre Vertical
  4. Cimm ACS CE 18 Litre Vertical
  5. Cimm ACS CE 8 Litre Vertical
  6. Cimm ACS CE 3 Litre Vertical
  7. Cimm AFE CE 60 Litre Vertical
  8. Cimm pressure vessel
  9. Cimm pressure vessel
  10. Cimm AFE CE 2000 Litre Vertical
  11. Cimm AFE CE 1000 Litre Vertical
  12. Cimm AFE CE 750 Litre Vertical
  13. Cimm AFE CE 500 Litre Vertical
  14. Cimm AFE CE 300 Litre Vertical
  15. Cimm AFE CE 200 Litre Vertical
  16. Cimm AFE CE 150 Litre Vertical
  17. Cimm AFE CE 100 Litre Vertical
  18. Cimm AFE CE 80 Litre Vertical

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