Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Product Background
Fluoroelastomers or Fluorocarbons (FKM), widely known as Viton®, are among the most suitable rubbers for continuous use at temperatures of 200°C and up to 300°C for short periods. Viton® is a registered trademark of The Chemours Company. Various grades of FKM are available, depending upon which physical properties such as compression set, flexibility (as in diaphragms) or chemical resistance are required. Both copolymers & terpolymers are widely used.
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Advantages Of FKM
- FKM has excellent resistance to ozone and weathering, oils and most chemicals. They can operate under a wide temperature range and are inherently more resistant to burning than other non-fluorinated hydrocarbons. Their good mechanical properties, improving sealing performance, and good compression set makes FKM a popular choice. It is also suitable for operation within environments that require parts to be resistant to explosive decompression.
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Disadvantages Of FKM Rubber
- One of the main disadvantages of FKM is the fact that it displays limited flexibility when required to operate at temperatures in the region of -10°C. Special low-temperature grades are available. However, FKM does tend to be expensive and unsuitable for use in the presence of phosphate esters and ketones.
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Applications & Uses
- Markets
- Plastics & Elastomers End Uses
- Typical Applications
- Accumulator Bladders
- Diaphragms
- Gaskets
- O-rings
- Seals Operating in Especially Harsh Environments.
Properties
- Color
- Typical Properties
- Note
* - Hot Air Aging 7 hours at 200°C
| Value | Units | Test Method / Conditions | |
| Density | 1.84 - 1.88 | g/cm³ | ISO 2781 |
| Hardness | 55 - 65 | IRHD | ISO 48 |
| Tensile Strength | 14.0 | MPa | ISO 37 |
| Elongation at Break | 383.0 | % | ISO 37 |
| Compression Set (24 hrs at 200°C) | 27.0 | % | ISO 815 |
| Change in Hardness* | 2.0 | IRHD | ISO 48 |
| Change in Tensile Strength* | 21.4 | % | ISO 37 |
| Change in Elongation at Break* | 1.2 | % | ISO 37 |
| Service Temperature | -20 to 230 | °C | — |