Rotary Feedthroughs with Magnetofluid Sealing

Rotary Feedthroughs with Magnetofluid SealingVACOM’s rotary feedthroughs with magnetofluid sealing are delivered by RIGAKU, a leading manufacturer of these products.
They stand out especially due to the following properties:

  • Large transmission torque
  • No backlash
  • Appropriate for rough, fine and high vacuum
  • High pressure capacity
  • High reliability due to leak-free operation
  • Very low magnetic leakage
  • Maintenance-free design
  • Long-term maintenance
  • Up to 15,000 revolutions / minute
  • Manufacturing of customised solutions

Functional principle

Unlike the conventional rotary feedthroughs with elastomer or bellow seal, a magnetic fluid is used as the dynamic seal that fills the gap between the moving shaft and its stationary housing. These liquid o-ring seal is held in place by powerful ring magnets without causing friction. This will result in no wearing or minimal heat generation so that long service life and high reliability are assured. The feedthroughs withstand differential pressures of above 2.5 bar. They have very low leak rates of up to 10-11 mbar l / s (He) or less and are absolutely vacuum suitable. They reach a rotational speed up to several thousand revolutions per minute. RIGAKU’s rotary feedthroughs have already proven long life and reliability by its use as components of high power x-ray generators and semiconductor process equipment. Besides standard examples customised solutions are available.


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