FFKM O-rings EN7LT

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 16x2.3 Kalrez-FFKM - 75 Shore A - Black - SES-619132 O-ring Black16 mm  x 2.3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 82x2.4 Kalrez-FFKM - 75 Shore A - Black - SES-623219 O-ring Black82 mm  x 2.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 307x7 Kalrez-FFKM - 75 Shore A - Black - SES-627360 O-ring Black308 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 28x1.1 Kalrez-FFKM - 75 Shore A - Black - SES-773625 O-ring Black28 mm  x 1.1 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 395x8.5 Kalrez-FFKM - 75 Shore A - Black - SES-777835 O-ring Black396 mm  x 8.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 15.8x2.65 Kalrez-FFKM - 75 Shore A - Black - SES-619104 O-ring Black15.8 mm  x 2.65 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 81x5.3 Kalrez-FFKM - 75 Shore A - Black - SES-623192 O-ring Black81 mm  x 5.3 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 304.2x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-627332 O-ring Black304.3 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 27.2x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-773596 O-ring Black27.3 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 390x15 Kalrez-FFKM - 75 Shore A - Black - SES-777808 O-ring Black391 mm  x 15 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 37.77x2.62 Kalrez-FFKM - 75 Shore A - Black - SES-621129 O-ring Black37.78 mm  x 2.62 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 159x4 Kalrez-FFKM - 75 Shore A - Black - SES-625283 O-ring Black159 mm  x 4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 586x8.4 Kalrez-FFKM - 75 Shore A - Black - SES-629361 O-ring Black587 mm  x 8.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 130x10.8 Kalrez-FFKM - 75 Shore A - Black - SES-775750 O-ring Black130 mm  x 10.8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 8.79x1.14 Kalrez-FFKM - 75 Shore A - Black - SES-618186 O-ring Black8.80 mm  x 1.14 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 58x3.5 Kalrez-FFKM - 75 Shore A - Black - SES-622275 O-ring Black58 mm  x 3.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 3.7x1.1 Kalrez-FFKM - 75 Shore A - Black - SES-617524 O-ring Black3.7 mm  x 1.1 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black46 mm  x 4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 188x3.5 Kalrez-FFKM - 75 Shore A - Black - SES-625770 O-ring Black188 mm  x 3.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black1.01 mm  x 0.75 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 174x2 Kalrez-FFKM - 75 Shore A - Black - SES-776237 O-ring Black174 mm  x 2 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 16.1x3.1 Kalrez-FFKM - 75 Shore A - Black - SES-619160 O-ring Black16.2 mm  x 3.1 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 82.65x2.49 Kalrez-FFKM - 75 Shore A - Black - SES-623251 O-ring Black82.66 mm  x 2.49 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 310x8 Kalrez-FFKM - 75 Shore A - Black - SES-627396 O-ring Black310 mm  x 8 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 28.65x1 Kalrez-FFKM - 75 Shore A - Black - SES-773665 O-ring Black28.66 mm  x 1 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 400x20 Kalrez-FFKM - 75 Shore A - Black - SES-777876 O-ring Black401 mm  x 20 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 35.5x1.5 Kalrez-FFKM - 75 Shore A - Black - SES-620940 O-ring Black35.6 mm  x 1.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 149.6x5.7 Kalrez-FFKM - 75 Shore A - Black - SES-625098 O-ring Black149.7 mm  x 5.7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 544x7 Kalrez-FFKM - 75 Shore A - Black - SES-629180 O-ring Black545 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 116.71x3.53 Kalrez-FFKM - 75 Shore A - Black - SES-775572 O-ring Black116.72 mm  x 3.53 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 21.3x3.53 Kalrez-FFKM - 75 Shore A - Black - SES-619702 O-ring Black21.4 mm  x 3.53 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 103x4 Kalrez-FFKM - 75 Shore A - Black - SES-623861 O-ring Black103 mm  x 4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 2.01x1.24 Kalrez-FFKM - 75 Shore A - Black - SES-617330 O-ring Black2.01 mm  x 1.24 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 42.8x3.53 Kalrez-FFKM - 75 Shore A - Black - SES-621438 O-ring Black42.9 mm  x 3.53 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 18.2x3.4 Kalrez-FFKM - 75 Shore A - Black - SES-773193 O-ring Black18.3 mm  x 3.4 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 332.22x9.5 Kalrez-FFKM - 75 Shore A - Black - SES-777430 O-ring Black332.23 mm  x 9.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black176.6 mm  x 7 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 795x4.5 Kalrez-FFKM - 75 Shore A - Black - SES-629671 O-ring Black796 mm  x 4.5 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
Placeholder O-ring Black157 mm  x 10 mm FFKM - FFPM75 Shore A Neeicon-bekijk icon
O-Ring 32.69x5.33 Kalrez-FFKM - 75 Shore A - Black - SES-620733 O-ring Black32.70 mm  x 5.33 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.