General Grade

Fluorocarbon Elastomer, commonly referred to as Viton* and FPM/FKM. FKM materials have a very high resistance to hydraulic fluids, chemicals and a number of organic compounds and operate in temperatures between -20 to +210°C. FKM is recommended for applications where its outstanding resistance to heat, chemicals, weathering and ozone is required.

FDA Grade

FKMM products are also available with FDA grade in brown colour, which is approved for usage in applications contact with foodstuffs.

Main Applications

Static and Dynamic seals, wipers, O-rings, Gaskets, Flange seals, rotary seal, rubber energisers in the oil and gas industry, especially in applications with high gas pressure. General application in petroleum fluids, water, greases, mineral oils.

Physical properties - General Grade

Density	DIN 53479	g/cm3	2.44
Hardness	DIN 53505	Shore A	85
Tensile strength	DIN 53504	N/mm2	11.8
Elongation at Break	DIN 53504	%	154
Modulus 100%	DIN 53504	N/mm	8.8
Tear Strength	DIN 53507B	N/mm	4.2
Compression Set: 70h/RT	DIN 53517A	%	14.1
Compression Set: 22h/70°C	DIN 53517A	%	9.4
Compression Set: 22h/100°C	DIN 53517A	%	6.0
Compression Set: 24h/150°C	DIN 53517A	%	9.4
Min. service temperature		°C	-20
Max. service temperature		°C	210

Physical properties – RGD grade

Density	DIN 53479	g/cm3	2.62
Hardness	DIN 53505	Shore A	85
Tensile strength	DIN 53504	N/mm2	7.7
Elongation at Break	DIN 53504	%	160
Modulus 100%	DIN 53504	N/mm	6.55
Tear Strength	DIN 53507B	N/mm	4.3
Compression Set: 70h/RT	DIN 53517A	%	--
Compression Set: 22h/70°C	DIN 53517A	%	--
Compression Set: 22h/100°C	DIN 53517A	%	--
Compression Set: 24h/150°C	DIN 53517A	%	27
Min. service temperature		°C	-25
Max. service temperature		°C	210
Short time max. service temp. In Air		°C	280

Physical properties

• Water up to 70° - R
• Water up to 90° - S
• Steam - U
• HFA, HFB, HFC Fluids - R
• HFD Fluids - U
• Minerals / Vegetable Oils - R
• Silicone oils - S
• Biodegradable Oils - S
• Diesel Fuel - R
• Gasoline Fuel - S
• Alcohols -R
• Ozone, Oxygen - U
• Air up to 100° - R
• Air up to 150° - U

Key to chemical resistance: R=Resistance S-Suitable U=Unsuitable

Analysis and Evaluation

The mentioned properties are only valid for test pieces of the corresponding ISO, Din, and ASTM standards. They cannot be directly related to seals, gaskets and other sealing products and should be used only as a general guide. Customer required properties for the rubber material can be produced and analysised.