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 offers the widest chemical resistance and temperature resistance of any elastomer, and can therefore be likened to a rubberised form of PTFE.

FFKM has an exceptional ability to resist wide temperature ranges and offers unparalleled chemical resistance against any other elastomeric material. It offers excellent resistance to permanent deformation and some grades offer high temperature resistance up to +330°C and low temperature flexibility at -45°C.

Within our wide range of Perfluoroelastomer materials, we have options to suit most applications, including material grades which offer Rapid Gas Decompression (RGD) resistance, Norsok M-710 approval and others which are FDA and USP Class IV approved.

Caution using Perfluoroelastomers (FFKM)

Caution should be taken when using FFKM in high temperature, high pressure environments, as the material will act as highly viscous fluid while under pressure and require an additional anti-extrusion / back-up ring to prevent extrusion and premature failure of the seal.

FFKM also has 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 - 25% more than the seal - to prevent extrusion caused by overfilling of the groove under thermal expansion.

Data sheet	Temperature	Hardness	Description
ZC005 Universal Grade FFKM	Min: -15°C Max: +260°C	77 IRHD	Developed to meet severe service requirements where application conditions may involve high temperature use and/or sealing of aggressive media.
ZC010 RGD Resistant FFKM	Min: -15°C Max: +260°C	92 IRHD	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
ZC100 White FDA Compliant Perfluorolastomer	Min: -15°C Max: +260°C	77 IRHD	Developed to meet severe service requirements where application conditions may involve high temperature use and/or sealing of aggressive media. Approvals: FDA
ZC101 Black FDA Compliant Perfluorolastomer	Min: -15°C Max: +260°C	77 IRHD	Developed to meet severe service requirements where application conditions may involve high temperature use and/or sealing of aggressive media. Approvals: FDA
ZC200 High Temperature FFKM	Min: -15°C Max: +300°C	78 IRHD	Developed to meet severe service requirements where application conditions may involve high temperature use and/or sealing of water and steam.
ZC318 Ultra High Temp FFKM	Min: -10°C Max: +330°C	75 Shore A	A high performance perfluoroelastomer material that has superb thermal resistance characteristics coupled with broad chemical resistance.
ZC400 Hot Water Steam AED Resistant FFKM	Min: -15°C Max: +300°C	92 IRHD	Developed to meet severe service requirements where application conditions may involve high temperature use and/or sealing of water and steam.
ZC401 High Temperature FFKM Water Steam	Min: -15°C Max: +300°C	78 IRHD	Developed to meet severe service requirements where application conditions may involve high temperature use and/or sealing of water and steam.
ZC501 Norsok M 710 Approved FFKM	Min: -19°C Max: +230°C	89 IRHD	This compound has been developed to meet the severe service requirements of the oil & gas industry. Approvals: Norsok M-710 Rev 2 Approved
ZC700 Ultra Low Temp FFKM	Min: -45°C Max: +240°C	93 IRHD	Developed to meet the severe service requirements of the Oil & Gas industry

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Our technical department can help with further information on any of our seals, and help with selecting the correct material for your application.

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