Safety valves and fittings for cryogenic applications
Series 2580

Rueckruf EN

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Overflow valve made of gunmetal, angle-type with threaded connections

The overflow valve is characterised by the fact that it ensures a continuous and quiet pressure reduction when used on tanks for the storage of cryogenic liquefied technical gases such as argon, oxygen, nitrogen or carbon dioxide. 

The overflow valve is adjusted to a pressure below the set pressure of the safety valves and thus prevents the safety valves of the tank from reacting. When the safety valves are fully opened, loud outflow noises are generated, which in most cases also significantly exceed the Immission guide value of TA Lärm (technical instructions for protection against noise) and deprive the neighbourhood from sleep. Thus, the response of the safety valves is often interpreted as a malfunction of the storage system and leads to the activation of the emergency plan including fire brigade, police and rescue services.

Using the overflow valve type 2580 can prevent this scenario.

  • Examples of use
  • Approvals
  • Downloads

Overflow valve for the protection of:

  • Containers and pipelines for the storage and transport of cryogenic liquified gases such as LIN, LOX, LAr, CO2, LNG.
  • Tunnel freezer plants
  • Dry ice blasting plants
  • Cryogenic plant construction
  • Liquid nitrogen dosing
  • Cryogenic milling process
  • Cryogenic machining
  • Ground freezing plants
  • Gases used in medical equipment
  • Plants for cryogenic gases which come into contact with foodstuffs

Overflow valves of this type are oil- and grease-free as standard.


TR ZU 010/2011

AD 2000 Data sheet A2
PED 2014/68/EU

Suitable for
1/4" - 1/2" 
-200°C to + 200°C 
0,2 - 70 bar 
Data sheet/Capacity table