Compounts

Base material Abbreviation Hardness Description
Recommended applications
Nitril butadien rubber NBR 50
60
70
80
90 		Resistant to oils, hydraulic fluids, gasoline, lubricant and aliphatic carbohydrates, acids and bases. Suitable for a broad range of applications due to high abrasion-resistance, stability and temperature-resistance (-30°C – 120°C). *** available with KTW-DGW and FDA approvals
Hydrogenated nitril rubber HNBR 75
80
90 		Highly resistant to technical oils containing additives, low vapor and gas permeability, good low-temperature flexibility to -40°C, good ozone resistance and high abrasion resistance; heat resistant to +145°C.
Fluor rubber FKM 65
70
80
90 		Extraordinarily high resistance to the influence of mineral oils and aromatic hydrocarbons as well as fluorocarbons, concentrated and diluted acids, weak bases. Excellent temperature resistance up to +200°C and low-temperature resistance to -20°C as well as high mechanical values and outstanding age resistance. *** FDA-approved
Silicone rubber VMQ 50
60
70
80
85 		Broad range of applications requiring excellent temperature resistance (-55°C - +200°C), which does not apply to exposure to steam or hot water, however. Although oil resistance is comparable to that of NBR, VMO does not achieve the same chemical and mechanical characteristics. ***Food quality
Ethylene propylene dien rubber EPDM 60
70
80
85 		The range of applications includes uses requiring high resistance to hot water and steam. Good age and ozone resistance. Good low-temperature resistance. Resistance to oils, lubricants and solvents comparable to that of NBR. Resistance to chemicals, including oxidizing agents, is very good. Temperature range from -40°C to +140°C. **also with peroxidic crosslinking
Poly tetra fluoro ethylene PTFE 95 Universal resistance to all influences except liquid alkaline metals and pressurized fluorine gas. Good glide characteristics, low wear and tear. Temperature resistant from -200°C to +260°C. Since PTFE as a Shore hardness of 95, the installation of O-rings in split grooves is recommended. Also available with elastomer core due to low elasticity.
High fluoride rubber H-FKM 65
70
75
80
85
90 		Chemical resistance comparable to that of perfluor elastomers, e.g. to acids, polar chemicals, water, aqueous solutions and steam. Broad temperature range from -25°C to +250°C. This material fills the gap between fluorocarbons and perfluor elastomers.
Perfluor rubber FFKM 60
65
70
75
80
85 		Outstanding and nearly universal resistance to chemical influences. Broad temperature range from -30°C to +334°C. Combines the elastic properties of perfluor rubber with the chemical and thermal resistance of PTFE. ***FDA approved

Information: Material Specification

Viton®Extreme   75 Excellent chemical resistance, surpassing that of FPM. The modified polymer structure results in a substantial reduction of swelling in solvents and highly alkaline media. Heat resistance and low-temperature flexibility are retained within a range of -15°C to +200°C.
Flour-silicone rubber FVMQ 60
65
70
75
80 		Fluor-silicone based material, also available with a conductive filling of silver, nickel, glass, copper, aluminum. Suitable for applications in a broad temperature range from -56°C to +175°C and in cases involving exposure to aggressive media such as oils, fuels and solvents without impairment of physical and electronic characteristics. Outstanding corrosion resistance. Conductive elastomer with excellent insulating properties.
Aflas® TFE/P 75 Unusually high resistance to numerous media and chemicals, including hot water, steam, acids, bases, ammonia, gases, oils, amines, motor oils and oxidizing media. Operating temperature range comparable to that of fluor elastomers: -20°C to +200°C.
Acrylate rubber ACM 70
80 		Excellent resistance to heat and hot oil. Resistant to motor oils, transmission fluids, lubricants, etc. High resistance to oxidation and ozone. Temperature range from -40°C to +200°C.
Chloroprene rubber CR 50
60
70
80 		The chemical and physical properties are comparable to those of NBR. Lower resistance to mineral oils but with excellent resistance to aging, ozone, acids and bases. Temperature range from -40°C to +120°C.
Polyurethane rubber AU 75
80
90 		Very good resistance to fuels and many standard technical oils, oxygen and ozone. High gas permeability. Temperature resistant from -30°C to +125°C. High mechanical values, e.g. tear and abrasion resistance.

Due to the wide range of possible uses of these materials, we cannot guarantee the suitability of our recommendations in every individual case. A thorough knowledge of materials and systems is the precondition and the basis for the delivery of an extensive program of sealing materials and elements as well as other heavy-duty molded technical parts.


® Viton is a registered trademark of DUPONT DOW ELASTOMERS L.L.C.

® AFLAS is a registered trademark of ASAHI GLASS Co., Ltd

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The test results are mean values and represent typical material properties. They are gained under usual laboratory conditions and do not necessarily correspond to results measured on finished goods. The compound information does not release the user from the necessity to conduct his own testings. Production methods and ingredients are subject to change with regard to technical progress and toxicological regulations.

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