design guide

Fluorosilicone (FVMQ)

Fluorinated silicones provide chemical properties similar to those of fluorinated organic elastomers. This property provides excellent resistance to hydrocarbon fuels, petroleum oils and silicone fluids.

Fluorosilicones provide a much wider operational temperature range than fluorocarbon (FKM) elastomers -70°F to 400°F (-57°C to 205°C). Many applications for fluorosilicones are in synthetic oils, gasoline and even extended fuels since its low temperature performance is much better than that of FKM’s.

Compound 70154, 70155, 70156A, 70157A

  • Good oil and compression set resistance
  • Low temperature operation
  • Good fuel and extended (alcohol) fuel resistance
Compound Hardness
Shore A
Tensile Elongation
(%)
Oil Aging
Volume Swell (Change %)
70hr at 150°C/302°F
Fuel Aging
Volume Swell (Change %)
70hr at 23°C/73°F
MPa psi ASTM #1 IRM 903 Ref fuel C
70154 40 6.9 1000 300 -1 +3 +19
70155 50 6.9 1000 450 +1 +3 +21
70156A 60 6.9 1000 170 -1 +2 +15
70157A 70 5.5 800 150 -1 +2 +19