The combination of these components creates an o ring that is virtually chemically inert and compression set resistant for use in harsh sealing environments.
Ptfe encapsulated o rings.
Kalrez costs an arm and a leg and ptfe while it may be chemically compatible very limited capability to recover after it has been compressed.
Standard or imperial sizes come in fractions of an inch.
Select from the various core options to satisfy your application.
When it comes to chemical service applications viton has it s limitations.
Encapsulated o rings not all o rings are created equally.
Ptfe encapsulated o rings comprise of an encapsulated core which has been seamlessly encapsulated in a jacket of ptfe.
Ptfe encapsulated o rings are o rings consisting of a seamless and uniform ptfe fep pfa encapsulation jacket which completely encloses a core material viton fluoroelastomer also available in silicone.
Fep ptfe encapsulated o rings combine ultimate chemical resistance of fep ptfe with the compressability of rubber or steel spring core.
Lubrication is less critical and can sometimes be omitted.
It can be used at temperatures up to 500 f 260 c.
The encapsulated o ring is intended to close off potential leak paths between mating surfaces in both static and dynamic applications.
It has the lowest coefficient of friction of any solid material.