Material Chart (sealing materials)

Acrylnitril-Butadien-
caoutchouc (NBR)

Standard quality for neutral media, gases, liquids, e.g. air, water and oil. Elastomer with good mechanical stability, low tendency to plastic yielding and abrasion. Resistant against ozone corrosion in most applications.
Resistant in: aliphatics, mineral oils with low content of aromatic comunds and dependent onapplication of additives, greases, some acids and alkaline solutions with low concentration and temperature, hardly flammable hydraulic liquids with at least 40% of water.
Not resistant: aromatic  hydrocarbons, chlorinated hydrocarbons, esterases, polar solvents, glycine-based brake fluids, most acids and alkaline solutions.
Temperature range: -10°C ... +90°C

Fluor-caoutchouc (FKM/FPM)

Elastomer with high temperature and weathering resistance as well as excellent resistance against oils and fuels but low cold elasticity.
Resistant in: hydrocarbons with high content of aromatic compounds, synthetic oils and many acids and alkaline solutions.
Not resistant in: amines, polar solvents, ketones and steam.
Temperature range: -10°C ... +180°C

Äthylen-Propylen-Dien-caoutchouc (EPDM)

Good resistance against heat ageing, weather and ozone corrosion.
Resistant in: water, hot water, steam, hot air, lees, alcohol and many acids.
Not resistant in: aliphatics, aromatics and chlorinated hydrocarbons (fuels and oils).
Temperature range: -20°C ... +130°C

Polytetrafluoräthylen (PTFE)

Low friction coefficient due to smooth and repellent surface. Good stability against nearly all media. Heavy strain results in permanent deformation by cold flow. Main application steam, aggressive media and with refrigeration technology. (Concerning pressure and temperature strictly refer to diagram.)
Temperature range: -30°C ... +180°C

Polyacetal (POM)

High pressure- and abrasion resistance, low water consumption, especially suitable for hydraulic oils, other oils and hardly flammable hydraulic liquids.
Temperature range: -10°C ... +80°C

Polyamid

High wear- and abrasion resistance, high stability against fules, oils and grease as well as against most solvents, hydrous dissolutions and alkalis.
Temperature range: -30°C ... +115°C

Silicone

For high temperatures or food applications.
Temperature range: max. +200°C