Bellows Bonnets

Type 808 bellows bonnets are leak-tight and used to ensure leaks are totally eliminated on steam, vacuum, light gases, high purity gases, VOCs, toxic or explosive gases or liquids.


Bellow-sealed bonnets are available with bellows in stainless steel or monel for 40 or 100 bar. In case of failure of the bellows, all the bonnets are fitted with PTFE  or PTFE/Kalrez backup seals and a purge port between the bellows and the backup seal can be added for instant detection of a leak.  Typical applications include vacuum, control of corrosive liquids and hazardous gases like Fluorine or Chlorine and light gases like Hydrogen or Helium.


Bellows Datasheet