Groove

#1 What is an O-ring groove?

The installation space of an O-ring is called a groove. In the standard (rectangular groove), it is defined by its width and depth. The correct and standard-compliant design of the O-ring groove is crucial in order to achieve an optimum sealing effect.

What types of O-ring grooves are there?

1. Rectangular groove (standard)
2. Trapezoid groove
3. Triangular groove

#2 What do I have to consider when designing a standard groove?

  • Compression in the groove should be approx. 20%
  • 20% of the groove should still be free after grouting
  • Always design grooves according to the standard tables available on the market
  • Permanent elongation after installation should be less than 6%
  • Permanent compression after installation should be less than 6%
Important note: The checklist refers to standard materials such as NBR, EPDM or FKM. The grooves of FEP-coated and especially pure PTFE O-rings deviate from the standard.

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