3M Technical Ceramics
Zweigniederlassung der 3M Deutschland GmbH

Rotary unions allow liquids or gases such as hydraulic fluid, cooling lubricants or air to be fed from a stationary feed system into a rotating unit. For such challenging machine elements, we offer high-quality 3M™ Silicon Carbide (previously: EKasic® SSiC) gaskets. The high quality of the seal rings make them ideal for heavy duty applications, especially with contaminated and / or abrasive fluids. They are exclusively custom made by us to customers’ specifications.

The Key to High Speeds

Seal rings made of high-quality 3M™ Silicon Carbide have a low specific density. It is between 2.80 and 3.20 g/cm3 depending on the material. Very high speeds of up to 50,000 l/min can be achieved with very low density and maximum stiffness.


3M™ Silicon Carbide Seal Rings are available from an external dia. of 6 mm.

Typical Rotary Union Application

  • Machine-tool spindles
  • Continuous casting lines
  • Calenders for the paper industry