V-rings are normally made of nitrile rubber that features good chemical resistance, resistance to wear and can be used in applications with normal operating temperatures. For applications with higher temperatures or where aggressive media are present, V-rings made of fluoro rubber can be supplied. The permissible operating conditions for V-rings made of nitrile or fluoro rubber are listed in the table. In the product table under the heading "Lip code", the letters R and V are used to identify nitrile rubber and fluoro rubber respectively.


At temperatures above 300 °C (570 °F), all fluoro elastomers and PTFE compounds give off dangerous fumes. This can occur, for example, if a welding torch is used when removing a bearing. Although the fumes are only produced at such high temperatures, once heated, the seals will be dangerous to handle even when they have cooled down. If it is necessary to handle PTFE or fluoro elastomer seals that have been subjected to the high temperatures mentioned above, the following safety precautions should be observed:
  • Protective goggles and gloves should always be worn.
  • The remains of seals should be put in an airtight plastic container marked “Material will etch”.
  • Comply with the safety precautions included in the material safety data that can be provided upon request.

If there is contact with your skin, this should be washed with soap and plenty of water. Wash your eyes with plenty of water if these materials get into your eyes. A doctor should always be consulted. This also applies if the fumes have been inhaled.
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