Fluorosilicone / FVMQ rubber quality
Fluorosilicone rubber is used in applications where dry-heat resistance is required Primary uses of fluorosilicone O-rings are in fuel systems at temperatures up to +177°C (+350°F) and in applications where the dry-heat resistance of silicone O-rings are required.
Fluorosilicone O-rings may also be exposed to petroleum-based oils and/or hydrocarbon fuels. In some fuels and oils, however, the high-temperature limit in the fluid list is more conservative because fluid temperatures approaching 200°C (390°F) may degrade the fluid, producing acids which attack fluorosilicone O-rings.
For low-temperature applications, fluorosilicone O-rings seal at temperatures as low as -73°C
(-100°F). Due to relatively low tear strength, high friction and limited abrasion resistance of these materials, they are generally recommended for static applications only.