Ferrofluid Feed through, Magnetic Feed through for film coating machine

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US $100-2,000 / Piece | 1 Piece/Pieces (Min. Order)
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20 Piece/Pieces per Day
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Standard or Nonstandard:
Ferrofluid Seal
Metal, stainless steel, magnetic fluid
Place of Origin:
Hunan, China (Mainland)
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Flanged solid spindle Sealing Feed-through with water cooling



Model No.         Bearing         Torque capacity (kg·cm)

SFZ020WH     7206/6205             616

SFZ025WH     7207/6206            1066

SFZ030WH     7208/6207            1706

SFZ040WH     7210/6209            3413

SFZ050WH     7212/6211             6106





Intorudction of magnetic fluid/ferrofluid                                                                            


Magnetic fluid is an unusual fluid in that it is attracted to a magnet. In the 1960s, NASA developed the magnetic fluid as part of its space programs. Magnetic fluid has three ingredients: ferromagnetic particles such as magnetite and composite ferrite, surfactant, and a base liquid such as water or oil.
The surfactant coats the 10 nm-dia ferromagnetic particles to avoid coagulation and keep them stably dispersed in the base liquid, forming a ferromagnetic fluid. Its dispersibility also remains stable in high magnetic fields.

This photo shows a phenomenon called 'spiking' that occurs when magnetic fluid is placed in a container and a magnet is brought under the container. Magnetic force acting on the surface of the magnetic fluid produces 'spikes', that look like large nails sticking out of the surface.


     Vapor pressure - temperature characteristics                             Vi scosity - temperature characteristics


Magnetic fluid/ferrofluid feedthrougs                                                                                



Fluid Sealing feed-throughs have been widely used in sealing various vacuum equipments, like, vacuum furnace, sinter furnace, brazier, hardening furnace, heat-treating furnace, monocrystalline silicon furnace, vacuum pump, film-coating machine, chemical gas deposit equipment, ion beam etching machine, molecular pump, ultrahigh-speed centrifugal machine and so on.


Some feedthroughs produced:                                                                                            






Vacuum Degree : 

10-6 Pa

Leakage Rate :

10-12 Pa·m3·s-1

Pressure Resistance :

0.2 MPa

Temperature Range :


Sealing Material :

Non-active Gas

Shell Material :

Non-Magnetic Permeability Stainless Steel

Spindle(Bush) Material :

Magnetic Permeability Stainless Steel

Shell Material

Stainless steel or Aluminum

Water Cooling :

Without / with





Silicon grower:




An example of an ultra-high vacuum system with the magnetic rotary seal


We can design special magntice fluid sealing feedthroughs as per customers' equipment requirements.