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.

19125 products
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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 2.9x1.07 Kalrez-FFKM - 90 Shore A - Black - SES-642466 O-ring Black2.9 x 1.07FFKM - FFPM90 Shore AJa50 icon
O-Ring 44.2x5.7 Kalrez-FFKM - 90 Shore A - Black - SES-646574 O-ring Black44.2 x 5.7FFKM - FFPM90 Shore AJa51 icon
O-Ring 177x7 Kalrez-FFKM - 90 Shore A - Black - SES-650636 O-ring Black177 x 7FFKM - FFPM90 Shore AJa56 icon
O-Ring 3x1.35 Kalrez-FFKM - 90 Shore A - Black - SES-765544 O-ring BlackPerlfluoro GummiFFKM - FFPMKalrez¬Æ 7090<br> anti explosive decompression AED<br> NORSOK M710<br> high temperature<br> chemical resistance Shore A9055 icon
O-Ring 4x2.5 Kalrez-FFKM - 90 Shore A - Black - SES-642613 O-ring Black4 x 2.5FFKM - FFPM90 Shore AJa60 icon
O-Ring 46.99x6.99 Kalrez-FFKM - 90 Shore A - Black - SES-646711 O-ring Black46.99 x 6.99FFKM - FFPM90 Shore AJa58 icon
O-Ring 304.5x8.4 Kalrez-FFKM - 90 Shore A - Black - SES-652377 O-ring Black304.5 x 8.4FFKM - FFPM90 Shore AJa57 icon
O-Ring 26.5x8 Kalrez-FFKM - 90 Shore A - Black - SES-766953 O-ring BlackPerlfluoro GummiFFKM - FFPMKalrez¬Æ 7090<br> anti explosive decompression AED<br> NORSOK M710<br> high temperature<br> chemical resistance Shore A9056 icon
O-Ring 35x5.3 Kalrez-FFKM - 90 Shore A - Black - SES-645953 O-ring Black35 x 5.3FFKM - FFPM90 Shore AJa58 icon
O-Ring 2.3x1.5 Kalrez-FFKM - 90 Shore A - Black - SES-642391 O-ring Black2.3 x 1.5FFKM - FFPM90 Shore AJa53 icon
O-Ring 43.2x2 Kalrez-FFKM - 90 Shore A - Black - SES-646502 O-ring Black43.2 x 2FFKM - FFPM90 Shore AJa54 icon
O-Ring 172.5x3.5 Kalrez-FFKM - 90 Shore A - Black - SES-650566 O-ring Black172.5 x 3.5FFKM - FFPM90 Shore AJa59 icon
O-Ring 737x7 Kalrez-FFKM - 90 Shore A - Black - SES-654664 O-ring Black737 x 7FFKM - FFPM90 Shore AJa55 icon
O-Ring 37.5x2 Kalrez-FFKM - 90 Shore A - Black - SES-646143 O-ring Black37.5 x 2FFKM - FFPM90 Shore AJa54 icon
O-Ring 3x1.05 Kalrez-FFKM - 90 Shore A - Black - SES-642479 O-ring Black3 x 1.05FFKM - FFPM90 Shore AJa60 icon
O-Ring 44.7x1.78 Kalrez-FFKM - 90 Shore A - Black - SES-646591 O-ring Black44.7 x 1.78FFKM - FFPM90 Shore AJa58 icon
O-Ring 178x4.5 Kalrez-FFKM - 90 Shore A - Black - SES-650656 O-ring Black178 x 4.5FFKM - FFPM90 Shore AJa53 icon
O-Ring 860x5.33 Kalrez-FFKM - 90 Shore A - Black - SES-654754 O-ring Black860 x 5.33FFKM - FFPM90 Shore AJa55 icon
O-Ring 5.35x1.15 Kalrez-FFKM - 90 Shore A - Black - SES-642772 O-ring Black5.35 x 1.15FFKM - FFPM90 Shore AJa54 icon
O-Ring 49.3x5.7 Kalrez-FFKM - 90 Shore A - Black - SES-646874 O-ring Black49.3 x 5.7FFKM - FFPM90 Shore AJa55 icon
O-Ring 299x8 Kalrez-FFKM - 90 Shore A - Black - SES-652304 O-ring Black299 x 8FFKM - FFPM90 Shore AJa55 icon
O-Ring 24.8x5.5 Kalrez-FFKM - 90 Shore A - Black - SES-766884 O-ring BlackPerlfluoro GummiFFKM - FFPMKalrez¬Æ 7090<br> anti explosive decompression AED<br> NORSOK M710<br> high temperature<br> chemical resistance Shore A9060 icon
O-Ring 347x7 Kalrez-FFKM - 90 Shore A - Black - SES-770901 O-ring BlackPerlfluoro GummiFFKM - FFPMKalrez¬Æ 7090<br> anti explosive decompression AED<br> NORSOK M710<br> high temperature<br> chemical resistance Shore A9058 icon
O-Ring 12x2.5 Kalrez-FFKM - 90 Shore A - Black - SES-643686 O-ring Black12 x 2.5FFKM - FFPM90 Shore AJa50 icon
O-Ring 69.5x3 Kalrez-FFKM - 90 Shore A - Black - SES-647818 O-ring Black69.5 x 3FFKM - FFPM90 Shore AJa52 icon
O-Ring 260x6 Kalrez-FFKM - 90 Shore A - Black - SES-651854 O-ring Black260 x 6FFKM - FFPM90 Shore AJa53 icon
O-Ring 15.8x1.4 Kalrez-FFKM - 90 Shore A - Black - SES-766434 O-ring BlackPerlfluoro GummiFFKM - FFPMKalrez¬Æ 7090<br> anti explosive decompression AED<br> NORSOK M710<br> high temperature<br> chemical resistance Shore A9058 icon
O-Ring 22.6x1.8 Kalrez-FFKM - 90 Shore A - Black - SES-644884 O-ring Black22.6 x 1.8FFKM - FFPM90 Shore AJa59 icon
O-Ring 106x7 Kalrez-FFKM - 90 Shore A - Black - SES-649018 O-ring Black106 x 7FFKM - FFPM90 Shore AJa57 icon
O-Ring 374.5x8.4 Kalrez-FFKM - 90 Shore A - Black - SES-653056 O-ring Black374.5 x 8.4FFKM - FFPM90 Shore AJa57 icon
O-Ring 48x3.6 Kalrez-FFKM - 90 Shore A - Black - SES-767638 O-ring BlackPerlfluoro GummiFFKM - FFPMKalrez¬Æ 7090<br> anti explosive decompression AED<br> NORSOK M710<br> high temperature<br> chemical resistance Shore A9058 icon
O-Ring 462x5.33 Kalrez-FFKM - 90 Shore A - Black - SES-771670 O-ring BlackPerlfluoro GummiFFKM - FFPMKalrez¬Æ 7090<br> anti explosive decompression AED<br> NORSOK M710<br> high temperature<br> chemical resistance Shore A9054 icon
O-Ring 10.2x1 Kalrez-FFKM - 90 Shore A - Black - SES-643444 O-ring Black10.2 x 1FFKM - FFPM90 Shore AJa57 icon
O-Ring 63.17x5.33 Kalrez-FFKM - 90 Shore A - Black - SES-647560 O-ring Black63.17 x 5.33FFKM - FFPM90 Shore AJa60 icon
O-Ring 242.6x6 Kalrez-FFKM - 90 Shore A - Black - SES-651616 O-ring Black242.6 x 6FFKM - FFPM90 Shore AJa59 icon
O-Ring 11.6x2.9 Kalrez-FFKM - 90 Shore A - Black - SES-766199 O-ring BlackPerlfluoro GummiFFKM - FFPMKalrez¬Æ 7090<br> anti explosive decompression AED<br> NORSOK M710<br> high temperature<br> chemical resistance Shore A9050 icon
O-Ring 248x14 Kalrez-FFKM - 90 Shore A - Black - SES-770204 O-ring BlackPerlfluoro GummiFFKM - FFPMKalrez¬Æ 7090<br> anti explosive decompression AED<br> NORSOK M710<br> high temperature<br> chemical resistance Shore A9050 icon
O-Ring 7x3 Kalrez-FFKM - 90 Shore A - Black - SES-642988 O-ring Black7 x 3FFKM - FFPM90 Shore AJa52 icon
O-Ring 53.6x3.53 Kalrez-FFKM - 90 Shore A - Black - SES-647093 O-ring Black53.6 x 3.53FFKM - FFPM90 Shore AJa58 icon
O-Ring 4.5x2 Kalrez-FFKM - 90 Shore A - Black - SES-642664 O-ring Black4.5 x 2FFKM - FFPM90 Shore AJa57 icon