Chemraz® (FFKM)– (Green Tweed’s trademark name) Chemraz® is the Green Tweed version of Kalrez® (a Dupont trademark), Simriz® (a Simrit trademark), Markez® (a Marco Rubber trademark) or FFKM. It is also a member of the perfluoroelastomer polymer family—polymers of three or more monomers in which all hydrogen positions have been replaced with fluorine. This complete state of fluorination results in outstanding resistance to heat and most chemicals and solvents.
You can find additional technical information related to this and other materials regarding chemical compatibility, resistance to abrasion, suitability for dynamic or static applications, temperature operating ranges, longevity, and other factors on our Technical Information pages.
Chemraz® Compounds & Physical Properties
|Green Tweeds Chemraz® Products||504||505||510||514/517||526||555|
|Features||Extremely broad range of chemical resistance||Broadest range of chemical resistance||Shore A hardness of 90-Broad range of chemical resistance||White for applications where contamination from carbon black must be prevented||Resistance to rapid gas decompressions||Wider operational band & superior compression set resistance|
|Green Tweeds Chemraz® Products||562||564/566||600||605||
|Features||Excellent compression set resistance, steam & chemical resistance||Exceptional chemical resistance||Extremely broad chemical resistance range from a high-density base polymer||
High temp. compound, comparable to Chemraz® 505. Great for steam and water
|Can handle continuous operating temps up to 615°||Combines resilience and sealing force with an elastomer with chemical resistance & low extractable similar to PTFE|