Fluorosilicone (FVMQ；FK)：
Fluorosilicones have good fluid resistance in addition to several silicone rubber properties. However, the resistance against ketones and aliphatic phosphate fluids are not as good. Mixing with dimethyl silicon may improve resistance against these types of fluids.
Fluid resistance is not as strong compared to PTFE (especially to fluids that contain aromatic materials). However, fluorosilicone materials are the primary choice when low temperature flexibility and fluid resistance are required. Average performance for electrical resistance, low compression deformation, high ozone resistance and weathering resistance. Fluorosilicones are expensive, special purpose materials that are mainly used as sealant strips, membranes, O-rings, inner-lining of containers, and electrical safety shoes.
※ We welcome orders of O-rings of various dimensions or other customized specifications.
|
Fluorosilicone (FVMQ) O－Ring
|
|
Base material or commercialized product
|
Fluorosilicone
|
|
Chemical name
|
Fluoro vinyl Methyl
siloxane
|
|
ASTM D1418 Nomenclature
--→
|
FVMQ
|
|
ASTM D2000 SAEJ200→
Type. class
|
FK
|
|
Physical properties
|
|
Density (gm/cm3)
|
1.4
|
|
Hardness range (shore A)
|
40-80
|
|
Breathability
|
B–A
|
|
Electrical resistance
|
D
|
|
Odor
|
A
|
|
Taste
|
B
|
|
Stain resistance
|
B
|
|
Stickiness
|
B–A
|
|
Mechanical properties
|
|
Tensile strength (max psi)
|
1﹐200
|
|
Abrasion resistance
|
D
|
|
Flexural resistance
|
D
|
|
Tear resistance
|
D
|
|
Impact resistance
|
D
|
|
Deformability
|
C
|
|
Flexibility
|
C–B
|
|
Elastic resilience
|
C
|
|
Stress relief
|
B
|
|
|
Thermal properties
|
|
Recommended maximum operating temperature (℃)
|
200
|
|
Low temperature ductility
|
B
|
|
Thermal aging resistance
|
A
|
|
Flame resistance
|
A
|
|
Resistance against the following elements
|
|
Weathering
|
A
|
|
Oxygen
|
A
|
|
Ozone
|
A
|
|
EM radiation
|
C–B
|
|
Water
|
A
|
|
Steam
|
C–B
|
|
Bases (dil / conc)
|
A/B
|
|
Acids (dil / conc)
|
A/B
|
|
Oil, petroleum, kerosene
|
A
|
|
Benzene, liquid hydrocarbons
|
B–A
|
|
Animal and plant oils
|
A
|
|
Oxidizing solutions
|
D
|
|
Halogenated solvents
|
B–A
|
|
Alcohol
|
C–B
|
|
Synthetic lubricants
|
A
|
|
Hydraulic circulation:
|
|
|
Silicate
|
B
|
|
Phosphate
|
D
|
|
※A = Best B = General C = Poor D = Not recommended
