Color - brown

FKM – fluoropolymer elastomer, («VITON» – registered trademark Du Pont).

The exceptional characteristics of this material include: resistance to high temperatures, ozone, different chemical ingredients and any weather. FKM is compatible with mineral oils, grease (which contain sulfur), HFD hydraulic fluids (almost every ester phosphate, chlorinated hydrocarbons) raw petroleum and sour gas.

FKM is not resistant to anhydrous ammonia, amines, ketones, esters, hot water and low-molecular organic acids.

FKM posses a high resistance to temperatures and chemicals.

Temperature range: from -20°C up to +200°C (short time up to +230°C). Due to its’ rich structure and chemical composition, FKM has an excellent resistance to ozone, weather impact and ageing. Swelling in different environs is very low, as well as in aromatic hydrocarbons. This material can be used in high vacuum conditions. FKM is not flammable.

Resistance

Good resistance Medium resistance Low resistance
Mineral oils Hot water
Aliphatic hydrocarbons (propane, butane, petrol) skidrol 500
Silicone oil and grease ammonia, amines, alkali
Adipose and vegetable oils and grease Hot steam
Fuels Low-molecular organic acids (acetic and formic acids)
Oils with soot and highly aromatic oils Hydrofluoric acids, chlorosulfonic acids.
Fire-resistant hydarulic fluids HFD-S, HFD-R Fire-resistant hydraulic fluids HFA, HFB, HFC Polar solvents (acetone, methyl ethyl ketone, dioxane, ethylacetate)
Biodegradable hydraulic fluid Brake fluids based on glycol
Aromatic hydrocarbon (toulene, benzol)

Application

FPM can be used for production of U-shaped seals, chevron seals, wipers and non-standard seals. FKM is mainly used in cases with temperature and chemical stress. Also it is used in hydraulic systems with fire-resistant hydraulic fluids HFD.

In practice verified that the seals by type "V-Ring" out of FPM capable of working at very high speeds, up to 78 m/s.

Mainly used

  • Non-standard seals in chemical industry and thermal engineering in metallurgy;
  • Rotary shaft seals;
  • O-rings;
  • Hydraulic seals for HFD-fluids.

FKM Material Data Sheet

Properties Value Unit Standard
Hardness 83 Sh A DIN 53505
Density 2,51 g/cm³ DIN 53479 or DIN EN ISO 1183-1
Compression set 225°C / 22 h 8 % DIN 53517 or DIN ISO 815-1
Rebound resilience 6 % DIN 53512
Tensile strength 11,4 MPa DIN 53504
Elongation at break 208 % DIN 53504
Tear strength 5 N/mm DIN 53515 or DIN ISO 34-1 A
Abrasion 225 mm³ DIN 53516
Min. working temperature -20 °C  
Max. working temperature +200 °C  

All above established data results from random tests which were taken from the functioning production. All data was stated based on standard test-products in accordance with ISO, DIN and ASTM standards and can substantially not be extended to the completed seal. Our practical technical recommendation, either oral, written or through tests is given in conformity with our best knowledge. However, this data is to be regarded as non-obligatory advice, also taking into consideration any protective rights of a third party, and does not acquit you from making tests with our product in relation to its adaptability for the assigned process and intendment. Utilization, application and processing of the products befall completely outside of our control and are therefore solely your liability. As regards the responsibility, it will be limited to all damages in the value of the product which we delivered and you applied. Certainly, we do assure the immaculate quality of our products in concordance with our general sales and delivery conditions.