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HL 109 Safety Devices Training Panel
Education / GUNT Hamburg / Thermal Engineering and HVAC / Heating and Ventilation in Buildings /

An electrically heated pressure vessel is mounted on the panel of the trainer. The vessel can be filled via different pipe sections. One pipe section is equipped with a system of safety devices for protecting a sealed water heater. The pressure vessel is also equipped with a thermal discharge safety device that discharges to a blow-off pipe.

  When the pressure or temperature level set is exceeded, the safety devices are tripped. Pressure and temperature in the system are displayed. 

Learning Objectives / Experiments
- Function of safety valves
- Function and layout of a system of safety devices
- Function of a thermal discharge safety device
[1] Trainer on heating systems and plumbing
[2] Pressure vessel 
[3] Threaded heater element with switch cabinet
[4] 2 spring tube manometers 
[5] 1 bimetallic dial thermometer 
[6] Thermal discharge safety device 
[7] 1 system of safety devices with pressure reducing valve, shut-off valve, test connections and backflow preventer, manometer connection and safety valve
[8] 2 blow-off lines, 1 filler pipe, 1 drain
Technical Data

Pressure vessel made of steel (1.4541)
- volume: approx. 5L
- max. operating pressure: 7.8bar
Threaded heater element

- power: 3kW

- protective system: IP 65
Thermal discharge safety device: actuated at 95°C
Setting range of pressure reducing valve: 1.5...6bar

Measuring ranges
- pressure: 0...10bar
- temperature: 0...120°C


Dimensions and Weight
l x w x h: 1660 x 250 x 1100 mm (panel)
Weight: approx. 50 kg (panel)
Required for Operation
230V, 50Hz, 1 phase
Water connection, drain
Scope of Delivery

1 trainer

1 set of hoses

1 manual

Order Details
065.10900  HL 109  Safety Devices Training Panel