Expansion Vessels / Pressure Vessels

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  1. Potable Water Expansion / Pressure Vessels

    Closed heating and hot water systems, unlike ol ...

  2. Heating & Cooling Expansion Vessels

    At Pump Sales Direct we stock a range of expans ...

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  1. Wilo XT500V 500 Litre Verticle Vessel
    £644.28 £536.90
    Free Delivery
    In stock
  2. Reflex DE Pressure Vessel - 60Ltr

    RE-7306400

    Reflex DE Pressure Vessel - 60Ltr

    Reflex DE 60L 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.

    £144.00 £120.00
    Free Delivery
    In stock
  3. Reflex DE Pressure Vessel - 80Ltr

    PV80W

    Reflex DE Pressure Vessel - 80Ltr

    Reflex DE 80L 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.

    £180.00 £150.00
    Free Delivery
    In stock
  4. Reflex DE Pressure Vessel - 100Ltr

    RE-7306600

    Reflex DE Pressure Vessel - 100Ltr

    Reflex DE 100L 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.

    £216.00 £180.00
    Free Delivery
    In stock
  5. Reflex DE Pressure Vessel - 200Ltr

    RE-7306700

    Reflex DE Pressure Vessel - 200Ltr

    Reflex DE 200L 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.

    £330.00 £275.00
    Free Delivery
    In stock
  6. Reflex DE Pressure Vessel - 300Ltr

    RE-7306800

    Reflex DE Pressure Vessel - 300Ltr

    Reflex DE 300L 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.

    £408.00 £340.00
    Free Delivery
    In stock
  7. Reflex DE Pressure Vessel - 500Ltr

    RE-7306900

    Reflex DE Pressure Vessel - 500Ltr

    Reflex DE 500L 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.

    £662.00 RRP £528.00 £440.00
    Free Delivery
    In stock
  8. Reflex NG Closed Heating & Cooling System Pressure Vessel - 80Ltr

    RE-7001200

    Reflex NG Closed Heating & Cooling System Pressure Vessel - 80Ltr

    Reflex NG 80L Vessel for heating and chilled water applications. This vessel has threaded connections and has a Max. working pressure of 6 bar with a Max. operating temperature of 70c. It comes pre-pressurised at 1.5 bar.

    £126.00 £105.00
    Free Delivery
    In stock
  9. Reflex NG Closed Heating & Cooling System Pressure Vessel - 100Ltr

    REFLEX-8001411

    Reflex NG Closed Heating & Cooling System Pressure Vessel - 100Ltr

    Reflex N 100L Vessel for heating and chilled water applications. This vessel has threaded connections and has a Max. working pressure of 6 bar with a Max. operating temperature of 70c. It comes pre-pressurised at 1.5 bar.

    £166.80 £139.00
    Free Delivery
    In stock
  10. Reflex NG Closed Heating & Cooling System Pressure Vessel - 140Ltr

    RE-7001600

    Reflex NG Closed Heating & Cooling System Pressure Vessel - 140Ltr

    Reflex NG 140L Vessel for heating and chilled water applications. This vessel has threaded connections and has a Max. working pressure of 6 bar with a Max. operating temperature of 70c. It comes pre-pressurised at 1.5 bar.

    £216.00 £180.00
    Free Delivery
    In stock
  11. Reflex N Closed Heating & Cooling System Pressure Vessel - 200Ltr

    REFLEX-8213300

    Reflex N Closed Heating & Cooling System Pressure Vessel - 200Ltr

    Reflex NG 200L Vessel for heating and chilled water applications. This vessel has threaded connections and has a Max. working pressure of 6 bar with a Max. operating temperature of 70c. It comes pre-pressurised at 1.5 bar.

    £318.00 £265.00
    Free Delivery
    In stock
  12. Reflex N Closed Heating & Cooling System Pressure Vessel - 250Ltr

    RE-7214300

    Reflex N Closed Heating & Cooling System Pressure Vessel - 250Ltr

    Reflex NG 250L Vessel for heating and chilled water applications. This vessel has threaded connections and has a Max. working pressure of 6 bar with a Max. operating temperature of 70c. It comes pre-pressurised at 1.5 bar.

    £342.00 £285.00
    Free Delivery
    In stock
  13. Reflex N Closed Heating & Cooling System Pressure Vessel - 300Ltr

    RE-7215300

    Reflex N Closed Heating & Cooling System Pressure Vessel - 300Ltr

    Reflex NG 300L Vessel for heating and chilled water applications. This vessel has threaded connections and has a Max. working pressure of 6 bar with a Max. operating temperature of 70c. It comes pre-pressurised at 1.5 bar.

    £408.00 £340.00
    Free Delivery
    In stock
  14. Reflex N Closed Heating & Cooling System Pressure Vessel - 400Ltr

    RE-7218000

    Reflex N Closed Heating & Cooling System Pressure Vessel - 400Ltr

    Reflex NG 400L Vessel for heating and chilled water applications. This vessel has threaded connections and has a Max. working pressure of 6 bar with a Max. operating temperature of 70c. It comes pre-pressurised at 1.5 bar.

    £558.00 £465.00
    Free Delivery
    In stock
  15. Reflex N Closed Heating & Cooling System Pressure Vessel - 500Ltr

    RE-7218300

    Reflex N Closed Heating & Cooling System Pressure Vessel - 500Ltr

    Reflex NG 500L Vessel for heating and chilled water applications. This vessel has threaded connections and has a Max. working pressure of 6 bar with a Max. operating temperature of 70c. It comes pre-pressurised at 1.5 bar.

    £684.00 £570.00
    Free Delivery
    In stock
  16. Reflex N Closed Heating & Cooling System Pressure Vessel - 600Ltr

    RE-8218400

    Reflex N Closed Heating & Cooling System Pressure Vessel - 600Ltr

    Reflex NG 600L Vessel for heating and chilled water applications. This vessel has threaded connections and has a Max. working pressure of 6 bar with a Max. operating temperature of 70c. It comes pre-pressurised at 1.5 bar.

    £760.80 £634.00
    Free Delivery
    In stock
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An expansion vessel is used to protect closed central heating systems from becoming overloaded by excessive pressure. It is a small tank or container that is divided in to two.

It provides a cushion against any shocks caused by small influxes of air that lead to increased air pressure in the system. This can also occur when the water hammer absorbs too much pressure as a result of thermal expansion.

Expansion vessels are most commonly used to remove the need for a continuous pump in a pumped central heating system. The user can configure a low and high pressure level on the pump settings. When the water pressure reaches the lowest setting, the pump will engage and fill the vessel to the high pressure point. When it reaches this point the pump still stop.

Once this cycle has been completed, the expansion vessel will maintain the stored water at high pressure levels, ensuring a better and more consistent water flow. If the pressure in the vessel drops to the lower point, the pump will kick in and the cycle begins again.

An expansion or pressure vessel can be used in the home for the supply of drinking water. When used with a boiler, an expansion vessel can help maintain water pressure to ensure showers reach full power on demand.

All tanks and containers supplied by Pump Sales Direct are manufactured to comply with UK water regulations when used in this application. Pump Sales Direct supply expansion vessels for Europe’s leading manufacturers, including Airfix, Flexcon, Gitral, Grundfos, Heatwave, PressureWave, Reflex, Varem and ZILMET.