Since 1879
Hygiene Ventile von Rieger

Overflow valve US – hygienic




RIEGER Overflow valves US open the set response and thus prevent unwanted pressures in pipelines .

They are available with weld ends and with dairy screwings or clamp ferrules.

One possible application is the protection of forced-feed pumpsperistaltic pumps.
The overflow valve US is suitable for all liquid media.

Overflow valves are no safety valves..

For this purpose we recommend the TÜV certified safety valve type SH.

DN 10 to DN 100
• one-piece solid valve housing
• no dead spaces, completely emptying
• no sump, no dome
• with lever for lifting operation by hand for cleaning and maintenance purposes
• suitable for liquids, vapors and gases 

  • Right angle type L
  • Double right angle type T
  • Cross type TT


Material product contact optional not product contact 1.4404/AISI316L
Seals  O-rings/gaskets EPDM
Temperatures maximum   EPDM
  operating temperature

sterilisation temperature
  130 °C*

150 °C* short-time (approx. 20 min)
Operating pressure closing pressure

control air pressure
max. 6 bar
min 6 bar -
max. 10 bar
Surfaces product contact

not product contact
Ra <= 0,8 µm
e-polished, other surfaces on request
Ra <=1,6 µm
Connections Standard- pipe classes DIN 11850-R2 (DIN 11866 A)
O.D.-Tube (DIN 11866 C)


the ATEX selection
chart in
PDF as download
… click here

Gebr. Rieger GmbH & Co. KG
Kochertalstraße 32
73431 Aalen - Germany

Tel.: +49 (0) 7361 - 5702-0
Fax: +49 (0) 7361 - 5702-51

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