SEAL- ORING – JOANG

DuPont™ Kalrez® is a perfluoroelastomer compound that provides long-term, reliable sealing in extreme chemical and temperature environments.
The use of DuPont™ Kalrez® elastomers reduces maintenance costs, thereby improving the productivity and uptime of critical manufacturing processes.
DuPont™ Kalrez® has near-inert chemical resistance allowing it to operate in the harshest environments while featuring the reliable sealing of an O-ring.
DuPont™ Kalrez® offers more stability, more resistance, more effective sealing
The use of DuPont™ Kalrez® creates a higher level of safety and reduces runaway emissions.
Compounds can be manufactured to resist degradation in harsh chemicals thereby improving process purity.
DuPont™ Kalrez® will handle extreme temperatures exceeding standard fluorocarbon materials such as Viton® while maintaining excellent chemical resistance.
Typical applications of DuPont™ Kalrez® would include chemical, petroleum and pharmaceutical processing where product purity is essential. This same purity goes into wafer processing in the semi-sub-world to improve sealing reliability in processes using high temperatures, with aggressive chemicals and plasmas.

Reference link:  https://www.dupont.com/products/kalrez.html