TÜV/CE safety valves for heating and cooling
Series 852bHL

Rueckruf EN

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Safety valves with bellows made of gunmetal, angle type with flange connections

Where highest material and quality standards are important, then safety valves made of gunmetal with flange connections can be an option. Also, this type of safety valve made of corrosion- and seawater-resistant gunmetal for the protection of large heating plants in the shipbuilding industry as well as in building technology applications represents a necessary addition to the comprehensive range of Goetze products.

  • Examples of use
  • Approvals
  • Downloads

For the protection of:

  • thermostatically protected closed-circuit water heating systems with flow temperatures of up to 120°C for all static heights or rated output above  350 kW according to TRD 721, DIN 4751 and  DIN EN 12828.

Should the thermostatic limiting and control unit fail, the safety valve has to blow-off the total heating output of the boiler as hot water and steam.
As these valves are completely made of metal they can also be installed at high environmental or radiation temperatures.

  • heating systems for building technology and industrial applications
  • co-generation plants (CHP)
  • biogas plants
  • district heating transfer stations, building sub-stations

Safety valves are set and sealed at the factory.


TÜV Type test approval 2007

EC type examination

TR ZU 032/2013 - TR ZU 010/2011

TRD 721
TRD 421
DIN 4751 Part 2
DIN 4757 Part 1 and Part 2
DIN EN 12828
DIN EN ISO 4126-1
PED 2014/68/EU

Suitable for
DN 40 and DN 50
- 10°C to + 120°C
0,5 - 25 bar
Data sheet/Capacity table