Kalrez O-rings

FFKM (Perfluoroelastomer) O-rings are one of the most reliable sealing solutions available, offering unmatched performance in some of the most demanding environments. Combining extreme temperature tolerance, excellent chemical resistance, and mechanical integrity, FFKM has earned its place in industries ranging from aerospace to chemical processing.  What is FFKM and Why is it so Effective in Extreme Environments? FFKM, or Perfluoroelastomer, is a...

Correct O-ring installation is essential for achieving a reliable, leak-free seal. Whether you are installing an O-ring in an internal (bore) groove or an external (shaft) groove, using the correct fitting techniques helps prevent twisting, pinching, cuts and premature seal failure. Improper installation is one of the most common causes of O-ring failure, particularly in dynamic or high-pressure applications. By following a...

Different elastomers behave differently in cold environments, and understanding how they retain their flexibility is essential for ensuring long-term sealing performance. One of the most widely recognised methods for evaluating the low-temperature performance of rubber compounds is the TR10 (Temperature Retraction – 10%) test. Standardised by ASTM D1329 and ISO 2921, TR10 provides engineers with a repeatable method for comparing how elastomers recover after...

What is Compression Set? Compression set occurs when an elastomer undergoes permanent deformation and fails to fully recover its original shape after being subjected to prolonged compression. In sealing applications, this loss of elasticity can significantly reduce sealing performance and increase the risk of leakage. A common example is an O-ring that remains flattened after extended service. As the material loses its...

O-rings play a critical role in the reliability of countless sealing applications. While selecting the right elastomer is essential, applying a specialist coating can further enhance performance, helping O-rings withstand demanding operating conditions while improving efficiency and reducing maintenance. Why Coat an O-Ring? An O-ring coating is a thin surface treatment that adds functional properties without significantly altering the dimensions...