Fluorosilicone (FVMQ) O-Rings

Fluorosilicone (FVMQ) O-Rings Material Description

Fluorosilicone (FVMQ) o-rings maintain excellent high temperature stability while offering excellent resistance to petroleum oils and hydrocarbon fuels as well as diester base lubricants (up to 175°C). FVMQ is widely used in aerospace, jet fuel applications, engine gaskets, automotive emission control systems, fuel pumps and tank systems. FVMQ has poor high friction and abrasion material properties and are not recommended for dynamic sealing.

Engineered Seal Products has the expertise and inventory for your fluorosilicone (FVMQ) o-ring applications. For over 50 years, ESP has been the leading engineering, quality, and supply chain choice for both standard and custom sealing applications. A seal, no matter the application, has to do just that.

Also Know As:

Silastic LS®, FSE®

What's The Difference Between Flourosilicone (FVMQ) & Silicone (VMQ) O-Rings?

While Flourosilicone is part of the Silicone family the biggest difference is that silicone (VMQ) offers great hot air resistance compared to Flourosilicone (FVMQ). While flourosilicone offers improved fuel and minieral oil resistance in comparison to silicone.

Fluorosilicone (FVMQ) Advantages:
  • Wide temperature range
  • Performs well in dry heat
  • Used best in static application
Fluorosilicone (FVMQ) Disadvantages:
  • Poor wear and abrasion resistance
  • Not recommended for dynamic sealing

Fluorosilicone (FVMQ) O-Rings Material Properties


Fluorosilicone (FVMQ) Material Temperature Range:

Heat Resistance: Up to approximately 350°F (177°C)

Cold Flexibility: Down to approximately -100°F (-73°C).

Normal Recommended Temperature Range Normal recommended temperature range

Extended Temperature Range Extended Temperature Range for short term only


PDF O-Ring Temperature Range Chart

Abrasion Resistance Poor
Chemical Resistance Excellent
Cold Resistance Good/Excellent
Heat Resistance Excellent
Oil Resistance Good
Ozone Resistance Excellent
Tensile Strength Fair
Water/Steam Resistance Fair

Material properties & Temp ranges based on Parker o-Ring Handbook (ORD 5700) recommendations.


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ASTM Designation
FVMQ
Shelf Life
25 Years
Hardness (Shore A) Range
40 - 80

Temperature ranges will apply to the majority of media for which the material is potentially recommended. With some media however, the service temperature range may be significantly different. ALWAYS TEST UNDER ACUTAL SERVICE CONDITIONS.

ESP’s shelf life recommendation is based on the ARP 5316 standard and intended to be utilized by those organizations who do not already have specific recommendations for the control of elastomeric seals. It should be noted that the packaging of the elastomeric seals prior to assembly into a product is an integral part of the controlled storage procedure. It provides a positive means of product identity from the time of manufacture, to the time of assembly.