Applications of FFKM

Perfluoroelastomers, such as Kalrez, are particularly suited for extreme service conditions. They are resistant to more than 1500 chemical substances, including ethers, ketones, esters, aromatic and chlorinated solvents, oxidizers, oils, fuels, acids, and alkali, and are capable of service at temperatures up to 316°C (600°F) [76]. Because of the retention of resilience, low compression set, and good creep resistance, they perform extremely well as static or dynamic seals under conditions where other materials such as metals, FKM, PTFE, and other elastomers fail. Parts from FFKM have very low outgassing characteristics and can be made from formulations that comply with FDA regulations [77]. Primary areas of application of perfluoroelastomers are paint and coating operations, oil and gas recovery, semiconductor manufacture, phar- 

FIGURE 5.8 Molded parts from FKM. (Courtesy of Solvay Solexis.) 

FIGURE 5.9 O-rings from FFKM. (Photo courtesy of DPA.) 

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