Vessels

(196 products)

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  1. Wilo XT500V 500 Litre Verticle Vessel
    £644.28 £536.90
    Free Delivery
    In stock
  2. Reflex DE Pressure Vessel - 600Ltr

    REFLEX-7306950

    Reflex DE Pressure Vessel - 600Ltr

    Reflex DE 600Ltr Vessel for heating and chilled water applications. This vessel has threaded connections and has a Max. working pressure of 10 bar with a Max. operating temperature of 70c. It comes pre-pressurised at 4.0 bar.

    £2,010.00 RRP £1,476.00 £1,230.00
    Free Delivery
    In stock
  3. Reflex DE Pressure Vessel - 18Ltr

    AL-PV18W

    Reflex DE Pressure Vessel - 18Ltr

    Reflex DE 18L Vessel for heating and chilled water applications. This vessel has threaded connections and has a Max. working pressure of 10 bar with a Max. operating temperature of 70c. It comes pre-pressurised at 4.0 bar.

    £60.00 £50.00
    Free Delivery
    In stock
  4. Zilmet Membrane - 50Ltr

    260100021

    Zilmet Membrane - 50Ltr

    For use with 50Ltr Vessels.

    £87.60 £73.00
    Free Delivery
    In stock
  5. Reflex N Closed Heating & Cooling System Pressure Vessel - 800Ltr

    n800l

    Reflex N Closed Heating & Cooling System Pressure Vessel - 800Ltr

    Reflex N, diaphragm expansion vessel for closed heating and cooling systems, built acc. to EN 13831. Approval acc. to EU Pressure Equipment Directive 2014/68/EU

    £1,440.00 £1,200.00
    Free Delivery
    In stock
  6. Reflex HW Home Booster Expansion Vessel - 25Ltr

    7200310

    Reflex HW Home Booster Expansion Vessel - 25Ltr

    WRAS approved horizontal design diaphragm expansion vessel for mains water installations

    £91.20 £76.00
    Free Delivery
    In stock
  7. Reflex DE Pressure Vessel - 2Ltr
    £31.20 £26.00
    In stock
  8. Salamander Expansion Vessel - ACCPV1L

    SAL-ACCPV1L

    Salamander Expansion Vessel - ACCPV1L

    Salamander Expansion Vessel. Manufacturers code: ACCPV1L. The Salamander pressure vessel (ACCPV1L) is a genuine, brand new Salamander product, covered by a Salamander manufacturer's guarantee.

    £48.00 £40.00
    In stock
  9. Reflex NG Closed Heating & Cooling System Pressure Vessel - 50Ltr

    8001011

    Reflex NG Closed Heating & Cooling System Pressure Vessel - 50Ltr

    Reflex NG 50L Vessel for heating and chilled water applications.

    £102.00 £85.00
    Free Delivery
    In stock
  10. Reflex NG Closed Heating & Cooling System Pressure Vessel - 35Ltr
    £54.00 £45.00
    In stock
  11. Stuart Turner Monsoon Pressure Vessel - 0.6 Litre

    ST-27787

    Stuart Turner Monsoon Pressure Vessel - 0.6 Litre

    Manufacturer code 27787. Replacement pressure vessel, suitable for all Monsoon Universal pumps manufactured after 2008.

    £52.80 RRP £48.00 £40.00
    In stock
  12. Grundfos GT-D-200-V Vertical Double Diaphragm Tank - 10 Bar - 200Ltr

    GR-97792897

    Grundfos GT-D-200-V Vertical Double Diaphragm Tank - 10 Bar - 200Ltr

    The Grundfos GT pressure tanks are long-life tanks ideally suited for controlling the pressure in domestic as well as  industrial applications in cold-water (drinking-water) systems.

    £828.00 RRP £621.00 £517.50
    Free Delivery
    In stock
  13. Grundfos GT-D-100V Vertical Diaphragm Tank - 10 Bar - 100Ltr

    GR-97527968

    Grundfos GT-D-100V Vertical Diaphragm Tank - 10 Bar - 100Ltr

    The Grundfos GT pressure tanks are long-life tanks ideally suited for controlling the pressure in domestic as well as industrial applications in cold-water (drinking-water) systems.

    £448.80 RRP £336.60 £280.50
    Free Delivery
    In stock
  14. Grundfos GT-D-80-V Vertical Double Diaphragm Tank - 10 Bar - 80Ltr

    GR-96894291

    Grundfos GT-D-80-V Vertical Double Diaphragm Tank - 10 Bar - 80Ltr

    The Grundfos GT pressure tanks are long-life tanks ideally suited for controlling the pressure in domestic as well as  industrial applications in cold-water (drinking-water) systems.

    £378.00 RRP £283.50 £236.25
    Free Delivery
    In stock
  15. Grundfos GT-U-5000-V Vertical Cold Water Bladder Tank - 10 Bar - 5000Ltr

    GR-96603456

    Grundfos GT-U-5000-V Vertical Cold Water Bladder Tank - 10 Bar - 5000Ltr

    The Grundfos GT pressure tanks are long-life tanks ideally suited for controlling the pressure in domestic as well as  industrial applications in cold-water (drinking-water) systems.

    £35,241.60 RRP £26,431.20 £22,026.00
    Free Delivery
    In stock
  16. Grundfos GT-U-4000-V Vertical Cold Water Bladder Tank - 10 Bar - 4000Ltr

    GR-96603454

    Grundfos GT-U-4000-V Vertical Cold Water Bladder Tank - 10 Bar - 4000Ltr

    The Grundfos GT pressure tanks are long-life tanks ideally suited for controlling the pressure in domestic as well as  industrial applications in cold-water (drinking-water) systems.

    £27,372.00 RRP £20,529.00 £17,107.50
    Free Delivery
    In stock
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The role of pressure vessels and expansion vessels in a heating or cooling system is to act as a method of compensating for fluid volumes. With water systems, fluids flowing through the circuit will change in volume as the temperature changes. The fluids expand with higher temperatures and contract with lower temperatures. The pressure of the entire system, however, has to be maintained within strict upper and lower limits for optimal operation. Both expansion and pressure vessels are usually made of drawn and welded steel. The exterior surface is treated with an anti-corrosion compound, while a diaphragm is installed within the tank interior and effectively divides the interior space into two. Water on one side of the diaphragm is connected via pipework to the heating and cooling system. When the heating system is operational, the water within the system expands. Too great an expansion of water volumes could damage the system’s pipework, so excess volumes are directed to the tank. Water cannot be compressed, and older heating systems could double pressures within the pipework, causing some catastrophic failures. With an expansion tank, the water will accumulate by compressing the air present on the other side of the diaphragm. If a tap in the system withdraws the water, or the temperature falls and the water contracts, the air will push the water out of the tank to resume circulating around the heating or cooling system. Such vessels are a vital part of relieving excess pressures in domestic, commercial and industrial heating and cooling systems.