Type test approved safety valves angle-type
for industrial applicationsSeries 652

Rueckruf EN

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Safety valves made of gunmetal, angle-type with threaded connections 

This safety valve made of gunmetal is an economical alternative to high-performance safety valves, in cases where only small blow-off capacities are required.
The version 652mf for neutral liquids is ideal for the protection of pumps and pressure vessel systems, in cases where boiling point is never reached or if no evaporation of the media can occur. A diaphragm protects the moving parts and compression spring against the medium. The version without diaphragm, type 652G is ideal for protecting small compressed air systems. Depending on the sealing material, this valve can be used for neutral, non-toxic compressible media with varying temperatures.
Fitted with an EPDM seal, this can be used for steam boilers with a volume of less than 10 liters up to a set pressure of 3 bar. 

  • Examples of use
  • Approvals
  • Downloads

For the protection of:

  • pressure tanks and systems for water and neutral liquids
  • pressure tanks and systems for air, neutral gases and vapours
  • steam boiler Cat.I < 10 liter up to 3 bar

Please observe plant-specific regulations and use of appropriate valve version and sealing material.

  • pump protection
  • pressure booster plants water-/air-side   
  • cooling-/chilling-systems
  • mini steam generators

Safety valves are set and sealed at the factory.


TÜV-Type test approval 293, 312
F , D/G

EU type examination
L, S/G


TR ZU 032/2013 - TR ZU 010/2011
F (L) , D/G (S/G)



AD 2000 Data sheet A2
TRD 421
DIN EN ISO 4126-1
PED 2014/68/EU
KGS AA 319

Suitable for
Air, gases and vapoursneutral
1/2"- 2" 
-50°C to + 200°C
(depending on version)
1,0 - 16 bar 
Data sheet/Capacity table