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Quick Details

  • Standard or Nonstandard: Nonstandard
  • Style: Ferrofluid Seal
  • Material: Metal, stainless steel, magnetic fluid
  • Place of Origin: Hunan, China (Mainland)
  • Brand Name: JT
  • Model Number: JTHS

Packaging & Delivery

Packaging Details cartons
Delivery Time 30days

Magnetic Fluid Seals

  

 

These are updated new sealing products. We using nm class magnetic fluid instead of rubber O-ring to provide high vacuum sealing and power transmitting performance.

   

Compared with normal mechanical seals, this kind of seal owns the following features:

1. Long life: magnetic fluid rings are in nearly zero wear-out.Seals life depends on bearing life;

2. Perfectly torque transmitting: as it is in magnetic liquid sealing, there is nearly no torque loss;

3. Quite low leakage: they are designed for the vacuum environment with 10-12 Pam3s-1 leakage rate only;

4. Fit for different rotating speed;

5. Good pressure resistance: the capacity can reach to 0.25 MPa

    

    

 

     

    

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:                                                                                            

 

 

 

Specifications:

 

Vacuum Degree : 

10-6 Pa

Leakage Rate :

10-12 Pa·m3·s-1

Pressure Resistance :

0.2 MPa

Temperature Range :

0-80oC

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

      

 

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.

 

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