FFKM O-rings EN7LT

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 15.6x2 Kalrez-FFKM - 75 Shore A - Black - SES-619087 O-ring Black15.6 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 82.42x3.56 Kalrez-FFKM - 75 Shore A - Black - SES-623241 O-ring Black82.43 mm  x 3.56 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 315x6 Kalrez-FFKM - 75 Shore A - Black - SES-627444 O-ring Black315 mm  x 6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black31.99 mm  x 2.34 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 422x9 Kalrez-FFKM - 75 Shore A - Black - SES-778038 O-ring Black423 mm  x 9 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 10x1.8 Kalrez-FFKM - 75 Shore A - Black - SES-618372 O-ring Black10 mm  x 1.8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 63.4x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-622525 O-ring Black63.5 mm  x 2.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black254 mm  x 4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 15.24x8.13 Kalrez-FFKM - 75 Shore A - Black - SES-773026 O-ring Black15.25 mm  x 8.13 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 319.46x1.27 Kalrez-FFKM - 75 Shore A - Black - SES-777323 O-ring Black319.47 mm  x 1.27 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 13x2.6 Kalrez-FFKM - 75 Shore A - Black - SES-618765 O-ring Black13 mm  x 2.6 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 73.7x1.8 Kalrez-FFKM - 75 Shore A - Black - SES-622921 O-ring Black73.8 mm  x 1.8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 286.3x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-627124 O-ring Black286.4 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 23.3x4.2 Kalrez-FFKM - 75 Shore A - Black - SES-773439 O-ring Black23.4 mm  x 4.2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 376.63x9.53 Kalrez-FFKM - 75 Shore A - Black - SES-777721 O-ring Black376.64 mm  x 9.53 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 22x8 Kalrez-FFKM - 75 Shore A - Black - SES-619789 O-ring Black22 mm  x 8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 107.67x1.78 Kalrez-FFKM - 75 Shore A - Black - SES-624009 O-ring Black107.68 mm  x 1.78 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 389x5 Kalrez-FFKM - 75 Shore A - Black - SES-628147 O-ring Black389 mm  x 5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 61.87x0.81 Kalrez-FFKM - 75 Shore A - Black - SES-774594 O-ring Black61.88 mm  x 0.81 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 20x3.5 Kalrez-FFKM - 75 Shore A - Black - SES-619579 O-ring Black20 mm  x 3.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black98 mm  x 5.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 13.34x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-618810 O-ring Black13.35 mm  x 2.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 74.6x3.53 Kalrez-FFKM - 75 Shore A - Black - SES-622968 O-ring Black74.7 mm  x 3.53 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 291x3 Kalrez-FFKM - 75 Shore A - Black - SES-627174 O-ring Black291 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 24.6x2.9 Kalrez-FFKM - 75 Shore A - Black - SES-773494 O-ring Black24.7 mm  x 2.9 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 384x14.09 Kalrez-FFKM - 75 Shore A - Black - SES-777776 O-ring Black385 mm  x 14.09 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 16.81x5.33 Kalrez-FFKM - 75 Shore A - Black - SES-619206 O-ring Black16.82 mm  x 5.33 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 86x1.25 Kalrez-FFKM - 75 Shore A - Black - SES-623364 O-ring Black86 mm  x 1.25 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 327x3.53 Kalrez-FFKM - 75 Shore A - Black - SES-627573 O-ring Black328 mm  x 3.53 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 36.2x1.2 Kalrez-FFKM - 75 Shore A - Black - SES-773911 O-ring Black36.3 mm  x 1.2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 445x8 Kalrez-FFKM - 75 Shore A - Black - SES-778176 O-ring Black446 mm  x 8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 29.51x5.33 Kalrez-FFKM - 75 Shore A - Black - SES-620489 O-ring Black29.52 mm  x 5.33 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 130.5x3.5 Kalrez-FFKM - 75 Shore A - Black - SES-624647 O-ring Black130.6 mm  x 3.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 96.5x2.62 Kalrez-FFKM - 75 Shore A - Black - SES-775243 O-ring Black96.6 mm  x 2.62 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 15.47x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-619057 O-ring Black15.48 mm  x 2.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 40x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-621268 O-ring Black40 mm  x 2.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 170x3 Kalrez-FFKM - 75 Shore A - Black - SES-625486 O-ring Black170 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 732x7 Kalrez-FFKM - 75 Shore A - Black - SES-629621 O-ring Black733 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 158.75x6.35 Kalrez-FFKM - 75 Shore A - Black - SES-776078 O-ring Black158.76 mm  x 6.35 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 28x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-620358 O-ring Black28 mm  x 2.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon

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 N7LT 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 N7LT  certified made from FFKM, please send us a Direct Enquiry. Together we can discuss the specifications and find the right product for you.