Perfluoroelastomers (FFKM / Kalrez™)

Perfluoroelastomer (FFKM) compounds are a ground breaking group of highly fluorinated elastomer materials which offer the chemical resistance and thermal properties of thermoplastic PTFE (Teflon®), while also offering the flexibility and resilience of an elastomer. FFKM’s offer the widest chemical resistance and temperature resistance of any elastomer and can therefore be likened to a rubberised form of PTFE.

Perflouroelastomers (FFKM’s) have an exceptional ability to resist wide temperature ranges and offer unparalleled chemical resistance against any other elastomeric material. They offer excellent resistance to permanent deformation and some grades offer high temperature resistance up to +330°C and low temperature flexibility at -45°C.

DMR offers a wide range of FFKM materials to suit most applications including material grades which offer Rapid Gas Decompression resistance (RGD) WITH Norsok M-710 approval and others which are FDA and USP Class IV approved.

CAUTION should be taken when using FFKM’s in high temperature, high pressure environments (HT/HP environments) as the material will act as highly viscous fluid while under pressure and require the additional use of an anti-extrusion / back-up ring in the application to prevent extrusion and premature failure of the seal. Perfluoroelastomers (FFKM’s) also have a higher coefficient of thermal expansion than other elastomer materials and cannot normally utilise standard O-ring groove designs. In normal room temperature conditions, the groove should be increased in volume by 25% more than the seal to prevent extrusion caused by overfilling of the groove under thermal expansion.

Please contact our technical department for further information or for help finding the correct choice of material for your application.

Material Range

Temperature

Min: -15°C
Max: +260°C

Min: -15°C
Max: +260°C

Min: -15°C
Max: +260°C

Min: -15°C
Max: +260°C

Min: -15°C
Max: +300°C

Min: -10°C
Max: +330°C

Min: -15°C
Max: +300°C

Min: -15°C
Max: +300°C

Min: -19°C
Max: +230°C

Min: -45°C
Max: +240°C

Hardness

77 IRHD

92 IRHD

77 IRHD

77 IRHD

78 IRHD

75 Shore A

92 IRHD

78 IRHD

89 IRHD

93 IRHD

Description

Developed to meet severe service requirements where application conditions may involve high temperature use and/or sealing of aggressive media.

Developed to meet service requirements where application conditions may involve high temperature use and/or sealing of high pressure gas.
Approvals: RGD (Rapid Gas Decompression) resistance

This FFKM compound has been developed to meet severe service requirements where application conditions may involve high temperature use and/or sealing of aggressive media.
Approvals: FDA

This FFKM compound has been developed to meet severe service requirements where application conditions may involve high temperature use and/or sealing of aggressive media.
Approvals: FDA

Developed to meet severe service requirements where application conditions may involve high temperature use and/or sealing of water and steam.

A high performance perfluoroelastomer material that has superb thermal resistance characteristics coupled with broad chemical resistance.

Developed to meet severe service requirements where application conditions may involve high temperature use and/or sealing of water and steam.

Developed to meet severe service requirements where application conditions may involve high temperature use and/or sealing of water and steam.

This compound has been developed to meet the severe service requirements of the oil & gas industry.
Approvals: Norsok M-710 Rev 2 Approved

Developed to meet the severe service requirements of the Oil & Gas industry.

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