O-Rings and Seals Properties
* Copyright for photograph
seals and o-rings are so resistant to chemicals and so stable at extreme temperatures, they last longer and seal more
effectively than parts made from other elastomers. They are cost effective because of the extended time between replacements.
Kalrez seals can remain elastic and recover from exposure to long-term high temperatures
(up to 327°) better than parts made from other elastomers designed for high temperatures. The main cause of failure in a high temperature application is embrittlement and hardening. Kalrez maintains its integrity far longer than other elastomers.
In high-vacuum applications,
Kalrez has almost no outgassing over a wide range of
temperatures. This helps reduce pump-down times, an important factor
in semiconductor manufacturing and other applications where it is critical to have a contamination-free
parts have virtually universal chemical resistance. They withstand
attack by more than 1,800 chemicals including solvents, amines
and plasmas. These parts are superior to and last longer than parts made from other elastomers
designed to resist chemicals.
force retention to keep parts tight
proven in ISO 334 tests, Kalrez outperforms other elastomers
when it comes to sealing force retention, a measure of how long the parts will last.
Even under harsh and aggressive conditions, it will retain
its sealing force longer in both short and long-term serivces.
And thanks to its true-rubber resiliency, it also prevents
leaks caused by creep, a major problem with PTFE and other plastic
O-Ring Compression Set at 204ºC (400ºF)
shown above, Kalrez parts exhibit low compression set, maintaining
their elastic recovery which means seals remain tight for a longer time.
Since these parts recover better while under compression than
other perfluoroelastomers, they also hold their shape better under
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Photograph: © Can Stock Photo Inc. | Lammeyer