FFKM O-rings EN7LT

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 491x15 Kalrez-FFKM - 75 Shore A - Black - SES-628881 O-ring Black492 mm  x 15 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 97x3.8 Kalrez-FFKM - 75 Shore A - Black - SES-775250 O-ring Black97 mm  x 3.8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 18x1.2 Kalrez-FFKM - 75 Shore A - Black - SES-619340 O-ring Black18 mm  x 1.2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 88x1.2 Kalrez-FFKM - 75 Shore A - Black - SES-623411 O-ring Black88 mm  x 1.2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 323.8x5 Kalrez-FFKM - 75 Shore A - Black - SES-627537 O-ring Black323.9 mm  x 5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 32.05x1.55 Kalrez-FFKM - 75 Shore A - Black - SES-773791 O-ring Black32.06 mm  x 1.55 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 414x12 Kalrez-FFKM - 75 Shore A - Black - SES-777978 O-ring Black415 mm  x 12 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 19.71x2.45 Kalrez-FFKM - 75 Shore A - Black - SES-619539 O-ring Black19.72 mm  x 2.45 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 96x3.53 Kalrez-FFKM - 75 Shore A - Black - SES-623676 O-ring Black96 mm  x 3.53 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 344x7 Kalrez-FFKM - 75 Shore A - Black - SES-627738 O-ring Black344 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 40.99x5.33 Kalrez-FFKM - 75 Shore A - Black - SES-774074 O-ring Black40.100 mm  x 5.33 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 445x15 Kalrez-FFKM - 75 Shore A - Black - SES-778181 O-ring Black446 mm  x 15 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 15.27x1.75 Kalrez-FFKM - 75 Shore A - Black - SES-619040 O-ring Black15.28 mm  x 1.75 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 80.8x5.33 Kalrez-FFKM - 75 Shore A - Black - SES-623179 O-ring Black80.9 mm  x 5.33 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black297 mm  x 10 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 26x1.31 Kalrez-FFKM - 75 Shore A - Black - SES-773551 O-ring Black26 mm  x 1.31 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 372x3 Kalrez-FFKM - 75 Shore A - Black - SES-777686 O-ring Black373 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black37.7 mm  x 4.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 158.1x5.33 Kalrez-FFKM - 75 Shore A - Black - SES-625259 O-ring Black158.2 mm  x 5.33 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 581x5 Kalrez-FFKM - 75 Shore A - Black - SES-629322 O-ring Black582 mm  x 5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 125x12.5 Kalrez-FFKM - 75 Shore A - Black - SES-775695 O-ring Black125 mm  x 12.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black19.8 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 96x2.5 Kalrez-FFKM - 75 Shore A - Black - SES-623673 O-ring Black96 mm  x 2.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 344x8 Kalrez-FFKM - 75 Shore A - Black - SES-627739 O-ring Black344 mm  x 8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 41x7 Kalrez-FFKM - 75 Shore A - Black - SES-774078 O-ring Black41 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 447x5 Kalrez-FFKM - 75 Shore A - Black - SES-778188 O-ring Black448 mm  x 5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 6x1.06 Kalrez-FFKM - 75 Shore A - Black - SES-617803 O-ring Black6 mm  x 1.06 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 50x6.5 Kalrez-FFKM - 75 Shore A - Black - SES-621879 O-ring Black50 mm  x 6.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 203x7 Kalrez-FFKM - 75 Shore A - Black - SES-626010 O-ring Black204 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 3.66x1.4 Kalrez-FFKM - 75 Shore A - Black - SES-772219 O-ring Black3.66 mm  x 1.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 197x10 Kalrez-FFKM - 75 Shore A - Black - SES-776447 O-ring Black197 mm  x 10 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 16x1.9 Kalrez-FFKM - 75 Shore A - Black - SES-619129 O-ring Black16 mm  x 1.9 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 83.2x2.4 Kalrez-FFKM - 75 Shore A - Black - SES-623272 O-ring Black83.3 mm  x 2.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 304.4x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-627337 O-ring Black304.5 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 28.5x4 Kalrez-FFKM - 75 Shore A - Black - SES-773658 O-ring Black28.6 mm  x 4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 387x10 Kalrez-FFKM - 75 Shore A - Black - SES-777791 O-ring Black387 mm  x 10 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 6.14x1.78 Kalrez-FFKM - 75 Shore A - Black - SES-617841 O-ring Black6.14 mm  x 1.78 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 51x3 Kalrez-FFKM - 75 Shore A - Black - SES-621919 O-ring Black51 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 206x3 Kalrez-FFKM - 75 Shore A - Black - SES-626052 O-ring Black206 mm  x 3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 4.3x5 Kalrez-FFKM - 75 Shore A - Black - SES-772265 O-ring Black4.3 mm  x 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.