Ferrofluid Feed through, Magnetic Feed through for film coating machine

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:                                                                                            

Applications                                                                                                                         

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.