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

Items 1-18 of 19

Set Descending Direction
per page
Page
View as Grid List
  1. Vertical Pressure Tank
  2. Horizontal Pressure Tank
  3. Zilmet 5 LV Vertical Expansion
  4. Zilmet 18 LV Vertical Expansion Tank
  5. Zilmet 24 LV Horizontal Expansion Tanks
  6. Zilmet 50 LH Horizontal Expansion
  7. Zilmet 24 LH
  8. Zilmet 60 LV
  9. Zilmet 60 LH Horizontal Expansion Tank
  10. Zilmet 100 LV Vertical Expansion
  11. Zilmet 80 LV
  12. Zilmet 80 LH Horizontal Expansion Tank
  13. Zilmet 100 LH
  14. Zilmet 200 LV Vertical Expansion Tanks
  15. Zilmet 200 LH
  16. Zilmet 300 LH Horizontal Expansion Tanks
  17. Zilmet 300 LV
  18. Zilmet 500 LV

Items 1-18 of 19

Set Descending Direction
per page
Page
View as Grid List