Ferrofluid Seal: Ferrofluid seal is a component used to shield gases and dust in high vacuum.

It creates a magnetic field with a magnet and a pole piece in the gap between the magnet and the axis of rotation.

When magnetic fluid is injected into this gap, it forms the shape of a liquid O-ring and is a non-contact seal that acts as sealing.

 

Typically, feedthrough uses several ferrofluid rings.

Each ring has a pressure capacity that remains vacuumed, and the total pressure capacity is approximately equal to the sum of the pressure capacities of each ring.

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No friction increases facility, durability, and blocks harmful gases and dust in ultra-high vacuum conditions.