Since 1879
Hygiene Ventile von Rieger

Safety valve SH – hygienic


The RIEGER Safety valve Type SH prevents excessive pressure in steam and gaseous media in plant components and tanks. The set pressure is generally higher than the operating pressure of the system. 
Already at 10% overpressure valve opens with full stroke.

The pharmaceutical and chemical industries as well as the biotechnology, like the cosmetics, food and beverage industry, are the ideal applications for the RIEGER safety valve.

For certificate CLICK here.

operating variants
  • pneumatically liftable
  • liftable with lever
  • pneumatically liftable with additional lever

DN 10 - DN 50

  • TÜV approval for steam and gases
  • no dead spaces, no swamp, no dome
  • one-piece solid valve housing
  • inlet is always smaller than outlet
  • seal replacement without special tools


  • Right angle type L


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)


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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Gebr. Rieger GmbH & Co. KG
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