Perfluoroelastomers - FFKM / Kalrez®
FFKM is a unique polymer that offers the highest chemical resistance in level with PTFE, and highest temperature of all rubbers.
The temperature ranges from -40° C to +326° C (Depending on compound)
Material/code
Description
Kalrez® 0090
Download datasheetKalrez® 0090 perfluoroelastomer parts deliver durable, reliable sealing solutions for applications requiring excellent rapid gas decompression (RGD) properties as well as high hardness and high modulus properties. Kalrez® 1050LF
Download datasheetDuPont™ Kalrez® 1050LF perfluoroelastomer parts are a general-purpose product for O-rings, seals, and other parts used in chemical process industries. It has good hot water/steam resistance, excellent amine resistance, and good compression set properties. The maximum suggested service temperature is 288°C (550°F). It is not recommended for use in organic or inorganic acids at high temperatures. Kalrez® 4079
Download datasheetDuPont™ Kalrez® 4079 perfluoroelastomer parts are a low compression set product for general purpose use in O-rings, diaphragms, seals and other parts used in the chemical process and aircraft industries. It is a carbon black filled product with excellent chemical resistance, good mechanical properties, and outstanding hot air aging properties. It exhibits low swell in organic acids, inorganic acids and aldehydes, and has good response to temperature cycling effects. A maximum service temperature of 316°C (600°F) is suggested, with short excursions to higher temperatures possible. Kalrez® 4079 is not recommended for use in hot water/steam applications or in contact with certain hot aliphatic amines, ethylene oxide, or propylene oxide. Kalrez® Spectrum™ 6375
Download datasheetKalrez® Spectrum™ 6375 is designed to give outstanding performance in the widest possible range of chemicals and temperatures. Kalrez® Spectrum™ 0040
Download datasheetKalrez® Spectrum™ 0040 perfluoroelastomer parts are specifically designed for low-temperature environments where significant chemical resistance is required (-42°C). Kalrez® 6230
Download datasheetDuPont™ Kalrez® 6230/6230A* perfluoroelastomer parts are a black product that provide superior chemical resistance and low contamination from extractables in pharmaceutical and food handling applications where FDA compliance is required. DuPont™ Kalrez® 6230/6230A parts are especially suited for Water for Injection (WFI) systems, Steam-in-Place (SIP) cleaning and other critical systems. Kalrez° 6230/6230A parts are thermally stable up to 260°C (500°F), permitting them to be used in Stage II Sterilization processes, where other elastomers lose their sealing ability. Kalrez® 6221
Download datasheetDuPont™ Kalrez® 6221 perfluoroelastomer parts are a white product that provide superior chemical resistance and low contamination from extractables in pharmaceutical and food handling applications where FDA compliance is required. DuPont™ Kalrez® 6221 parts are especially suited for Water for Injection (WFI) systems, Steam-in-Place (SIP) cleaning and other critical systems. Kalrez° 6221 parts are thermally stable up to 260°C (500°F), permitting them to be used in Stage II Sterilization processes, where other elastomers lose their sealing ability. Kalrez® 6221 is available as O-rings. For white custom parts, please refer to Kalrez® LS205 parts. Kalrez® 9100
Download datasheetKalrez® 9100 is an amber translucent product targeted specifically for PECVD and HDPCVD processes. It has also exhibited excellent performance in "select" etch processes. Kalrez® 8575
Download datasheetKalrez® 8575 perfluoroelastomer parts are a white product for “select” etch, ash/strip and deposition process applications. Kalrez® 8475
Download datasheetKalrez® 8475 perfluoroelastomer parts are a white product that have been specifically developed to meet the challenging requirements associated with lamp anneal and RTP sealing applications in semiconductor thermal processes. Kalrez® 8085
Download datasheetKalrez® 8085 has been reported to significantly improve wafer production in a variety of semiconductor plasma process applications where oxygen and fluorinated plasmas are used during the cleaning cycle. Kalrez® LS205
Download datasheetKalrez® LS205 perfluoroelastomer parts provide superior chemical resistance and low extractables in demanding applications for use in food handling and pharmaceutical applications where FDA compliance is required. Kalrez® Spectrum™ 6380
Download datasheetKalrez® Spectrum™ 6380 perfluoroelastomers parts are a non-black product specifically developed for chemical processes involving hot, aggressive amines. Kalrez® Spectrum™ 7075
Download datasheetDuPont™ Kalrez® perfluoroelastomer parts are the material of choice for mechanical seals, valves, flanges and other demanding chemical and hydrocarbon processing applications. More about FFKM
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.
M Seals is an official Kalrez® distributor with 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 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 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.
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