FFKM O-rings EN9EX

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To provide even greater thermal stability and solvent resistance, tetrafluoroethylene (TFE) containing fluoroelastomer terpolymers were introduced in 1959. The latest FKM polymers have a much broader fluids resistance profile than standard fluoroelastomers, and are able to withstand strong bases and ketones as well as aromatic hydrocarbons, oils, acids, and steam. In 1975 a new fluoroelastomer family was introduced by Asahi Glass Co., FEPM, based on an alternating copolymer of TFE and propylene. It is marketed under the trade name AFLAS®.

The chemical resistance and high-temperature stability is due to the bulkiness of the fluorine atoms, shielding the polymer backbone and carbon-fluor bond from attack, and the high bonding energy of the carbon-fluor bond.

FFKM gives the indication for the types of improved properties for different applications.


Material: Fluorocarbon elastomers
Fluorocarbon rubber is an elastomer

Fluorocarbon elastomers are highly fluorinated carbon-based polymers that are used in applications that must withstand aggressive chemical and ozone attacks.

In general, with increasing fluorine content, the resistance to chemical attack is improved, while the low temperature properties decrease. However, there are special quality fluorocarbons that do have a high fluorine content at low temperature properties.

Good qualities:

  • Chemical compatibility
  • Good temperature resistance
  • Low compression setting
  • Resistant to minerals, oils and fats
  • Good gas tightness
  • Excellent resistance to non-polar media
  • Excellent weather and aging stability
  • Very good oxygen and ozone stability
  • Operating temperature range from -26 °C to +205/230 °C (-15 °F to +400/440 °F)
  • When used briefly, the material can tolerate even higher temperatures
  • Special compounds with improved chemical resistance are available
  • Brake fluids based on glycol
  • Low molecular weight organic acids

FFKM
FFKM are perfluoroelastomeric compounds that contain an even greater amount of fluorine than FKMO fluoroelastomers.

FFKM have an improved resistance to high temperatures and chemicals and are even resistant to environments where oxygen plasma is present for many hours. Certain grades have a maximum continuous service temperature of 327 °C / 621 °F. They are often used to make o-rings and gaskets that are used to make o-rings and gaskets that are used in applications where contact with hydrocarbons or highly corrosive liquids the case, or when a wide temperature range is encountered.

On this page we offer our range of N9EX certified O-Rings. Search for your specific O ring by using the filters on the left of the page or take your time and browse our wide range of our products. When you can not find the product you are looking for in our N9EX certified made from FFKM, please send us a Direct Enquiry. Together we can discuss the specifications and find the right product for you.

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 2,9x1,07 Kalrez-FFKM - 90 Shore A - Black - SES-642466 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 44,2x5,7 Kalrez-FFKM - 90 Shore A - Black - SES-646574 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 177x7 Kalrez-FFKM - 90 Shore A - Black - SES-650636 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 3x1,35 Kalrez-FFKM - 90 Shore A - Black - SES-765544 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 4x2,5 Kalrez-FFKM - 90 Shore A - Black - SES-642613 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 46,99x6,99 Kalrez-FFKM - 90 Shore A - Black - SES-646711 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 304,5x8,4 Kalrez-FFKM - 90 Shore A - Black - SES-652377 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 26,5x8 Kalrez-FFKM - 90 Shore A - Black - SES-766953 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 35x5,3 Kalrez-FFKM - 90 Shore A - Black - SES-645953 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 2,3x1,5 Kalrez-FFKM - 90 Shore A - Black - SES-642391 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 43,2x2 Kalrez-FFKM - 90 Shore A - Black - SES-646502 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 172,5x3,5 Kalrez-FFKM - 90 Shore A - Black - SES-650566 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 737x7 Kalrez-FFKM - 90 Shore A - Black - SES-654664 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 37,5x2 Kalrez-FFKM - 90 Shore A - Black - SES-646143 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 3x1,05 Kalrez-FFKM - 90 Shore A - Black - SES-642479 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 44,7x1,78 Kalrez-FFKM - 90 Shore A - Black - SES-646591 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 178x4,5 Kalrez-FFKM - 90 Shore A - Black - SES-650656 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 860x5,33 Kalrez-FFKM - 90 Shore A - Black - SES-654754 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 5,35x1,15 Kalrez-FFKM - 90 Shore A - Black - SES-642772 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 49,3x5,7 Kalrez-FFKM - 90 Shore A - Black - SES-646874 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 299x8 Kalrez-FFKM - 90 Shore A - Black - SES-652304 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 24,8x5,5 Kalrez-FFKM - 90 Shore A - Black - SES-766884 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 347x7 Kalrez-FFKM - 90 Shore A - Black - SES-770901 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 12x2,5 Kalrez-FFKM - 90 Shore A - Black - SES-643686 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 69,5x3 Kalrez-FFKM - 90 Shore A - Black - SES-647818 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 260x6 Kalrez-FFKM - 90 Shore A - Black - SES-651854 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 15,8x1,4 Kalrez-FFKM - 90 Shore A - Black - SES-766434 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 22,6x1,8 Kalrez-FFKM - 90 Shore A - Black - SES-644884 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 106x7 Kalrez-FFKM - 90 Shore A - Black - SES-649018 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 374,5x8,4 Kalrez-FFKM - 90 Shore A - Black - SES-653056 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 48x3,6 Kalrez-FFKM - 90 Shore A - Black - SES-767638 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 462x5,33 Kalrez-FFKM - 90 Shore A - Black - SES-771670 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 10,2x1 Kalrez-FFKM - 90 Shore A - Black - SES-643444 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 63,17x5,33 Kalrez-FFKM - 90 Shore A - Black - SES-647560 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 242,6x6 Kalrez-FFKM - 90 Shore A - Black - SES-651616 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 11,6x2,9 Kalrez-FFKM - 90 Shore A - Black - SES-766199 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 248x14 Kalrez-FFKM - 90 Shore A - Black - SES-770204 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 7x3 Kalrez-FFKM - 90 Shore A - Black - SES-642988 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 53,6x3,53 Kalrez-FFKM - 90 Shore A - Black - SES-647093 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon
O-Ring 4,5x2 Kalrez-FFKM - 90 Shore A - Black - SES-642664 O-ring schwarzNORSOK M710 – AEDFFKM90 Shore A0 icon