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HL 110 Expansion Vessel Training Panel
Education / GUNT Hamburg / Thermal Engineering and HVAC / Heating and Ventilation in Buildings /

Using this trainer the function of a normal expansion vessel is examined and a pressure-volume characteristic recorded. The expansion vessel is filled with water from a supply tank.

  The pressure is generated using a small compressor and adjusted using a pressure regulating valve. The amount of water taken up by the expansion vessel is read on a scale on the supply tank.

Learning Objectives / Experiments

- Function and operation of a diaphragm expansion

- Displacement volume of an expansion vessel as a

  function of the pressure


[1] Trainer on heating systems and plumbing
[2] Small compressor for pressure generation

[3] Measuring tank with scale
[4] Expansion vessel
[5] Manometer 
[6] Ball valve in connecting pipe between measuring tank and expansion vessel
[7] Adjustable safety valve
[8] Pressure controller for air with overpressure protection

[9] Cutaway model of an expansion vessel


Technical Data

Expansion vessel

- volume: 2L

- filling pressure: 0.5bar
Measuring tank

- volume: 3.75L

- max. pressure: 2.5bar

- power consumption: 65W

- max. flow rate: 11.5L/min

- max. pressure: 2bar

- final vacuum: 240mbar
Pressure controller for air, adjustable: 0.06...2bar


Measuring range

- pressure: 0...2.5bar


Dimensions and Weight
l x w x h: 1650 x 280 x 1100 mm (panel)
Weight: approx. 50 kg (panel)
Required for Operation
230V, 50Hz, 1 phase
Scope of Delivery

1 trainer

1 cutaway model "expansion vessel"

1 manual

Order Details

065.11000  HL 110  Expansion Vessel Training Panel