Fluorosilicone, frequently abbreviated as FVMQ, is a rubber compound used mainly in aerospace.
With good temperature performance and excellent chemical resistance, fluorosilicone O-rings are a great choice for many applications.
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Fluorosilicone O-rings are the right sealing option for many applications due to their resistance to jet fuel and mineral oils and their mechanical properties.
These properties include:
In addition to jet fuel and mineral oils, fluorosilicone O-rings are resistant to:
This means fluorosilicone O-rings can be used outdoors and with a wide range of lubricants..
The standard durometer range is from 50 Shore A to 80 Shore A. However, most fluorosilicone O-rings have a 60 Shore A or 70 Shore A hardness.
FVMQ O-ring temperature ranges are standard from - 100ºF to 350ºF. These temperatures are based on dry air; the actual temperature range depends on end-use application and will vary. Contact us for more details.
Dimensions of fluorosilicone O-rings can vary significantly based on application. Whether metric or imperial sizes are required, many sizes can be produced. See our O-ring size chart for some of the most common sizes we offer, or contact us to discuss a size not shown or custom O-rings.
Fluorosilicone O-rings are used in a variety of applications. Some of the most common uses are in aerospace, commercial and military, automotive, and oil and gas industries.
General applications include:
Fluorosilicone O-rings are a widely used seal, especially in the aerospace industry. These O-rings have many benefits, with a high-temperature range and high resistance to jet fuels, ozone, and other mineral oils.
Due to the mechanical properties of this seal, FVMQ O-rings are not recommended for dynamic sealing operations and should only be used for static applications.
In a static application, if resistance to a wide temperature range or harsh chemicals is required, FVMQ O-rings may be the right fit.
Are fluorosilicone O-rings suitable for your application? Then, partner with Wyatt Seal, an industry expert, to avoid mistakes and make it easy to find the perfect sealing solution – let’s talk.
Fluorosilicone is a hybrid of silicone and fluoroelastomers. More specifically, it combines trifluoropropyl, methyl, vinyl, and silicone.
Fluorosilicone O-rings are similar in regards to their mechanical properties to silicone O-rings. However, they have a higher resistance to jet fuel and mineral oils. Conversely, fluorosilicone has equivalent chemical resistance to fluorocarbons but performs better with lower temperatures.
There can be specially formulated FVMQ O-rings for particular applications. For instance, the food and beverage industry has specific requirements and will usually need to use an FDA-approved food grade fluorosilicone O-ring. This means that the materials used must meet strict standards. Fluorosilicone is an excellent material to meet these standards as it does not produce a smell or taste.
Other unique formulations could also be used for medical and pharmaceutical applications.
Fluorosilicone O-rings can be produced by injection molding, compression molding, or extrusion. Although a round O-ring is standard, fluorosilicone O-rings can be made into other cross-sections. These cross-sections are dependent on application. Contact us for more details.
All FVMQ O-rings must be lubricated to work correctly. The lubrication depends on the application but is generally a form of oil, fuel, or grease.
For many applications, the standard blue fluorosilicone O-ring will suffice. However, the O-rings can be made in different colors in other applications. These can include high-visibility colors. For more information on what colors are available, contact us.
Are fluorosilicone O-rings suitable for your application? Get it right with Wyatt Seal – let’s talk.