|Bond Energy (Kcal)||99||116||81|
|Covalent Radius (A)||0.37||0.72||0.99|
FFKM is a hyperthermal compound with greater quantity of fluorine contained to further increase resistance against high temperature and chemicals. As such, it can withstand for longer time under environment with existence of oxygen-plasma. Some ratings have maximum of 324oC of continuous temperature. In general, it is used in manufacturing O-ring and gasket used to confront a diverse range of temperatures and come in contact with hydrogen carbon or liquid with high corrosiveness.
There are FFKM that reaches temperatures in the range of 340 oC. In the case of application to vacuum, customized discharge at very low temperature range [200~300 oC] for prolonged period of processing and very low pollution requirements (emission of gas and discharge of particles) are needed. Following manufacturing, it reaches the gas emission performances that are similar to those of TEFLON and vacuum penetration rate similar to that of VITON compound. FFKM can reach the UHV pressure very well even without the use of metal sealing.