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Phenyl Silicone Fluid

  • Silicone Diffusion Pump Fluids 275
  • Silicone Diffusion Pump Fluids 275
Silicone Diffusion Pump Fluids 275Silicone Diffusion Pump Fluids 275

Silicone Diffusion Pump Fluids 275

  • Model Name:NV-SiF275
  • Main components:Penta phenyl-trimethyltri-siloxane
  • Refractive index(25℃):1.5765-1.5785
  • Product description: Silicone Diffusion Pump Fluids 275 for ultrahigh vacuum applications

Product name: Silicone Diffusion Pump Fluids 275


Main components:Penta phenyl-trimethyltri-siloxane

Technique Data:

Appearances: Colorless to light yellow transparent liquid

viscosity(25℃) mm²/s: 165-185

refractive index(25℃):1.5765-1.5785

Flash point(°C):≥ 243

Freezing point(°C):≤-14~-18℃

Special property:

1.Producing ultrahigh and ultraclean vacuum.For ultrahigh vacuum applications in the range of 10-9 to 10-10 torr (untrapped) and 10-11 torr (trapped).

2.Low vapor pressure and backstreaming rate,good thermal stability.

3.It has the highest phenyl content of all silicone diffusion pump fluids and the best resistance to radiation.

4.Oxidation Resistance .

5. Excellent resistance to explosion.

6. Rapid Cycling.

7. Long service life: Thermal and chemical stability of silicone fluids allows exceptionally long runs without deterioration or contamination.


1.It is widely used in high vacuum smelting industry, electron tube industry, light bulb, high vacuum coating (film), atomic energy accelerator, electron microscope, display device and so on.

2.Pressure signal transmission filling oil under the condition of temperature change in all kinds of pressure transmitters are used to transmit the filling oil

3.Used in the insulating impregnant of large-scale pressure capacitor.It can greatly improve the specific characteristic parameters, it has a wide working temperature range, and can replace chlorinated biphenyls.

4.It is used in plasma bag, infusion bag as isolation anti sticking additive, basic oil for surgical medicine, cosmetics, skin care, antifreeze sore and other oil additives.

Storage and transportation:

1.Put in clean, dry and neutral tinplate.

2. Be stored in the warehouse which is moisture-proof and sunlight proof,the indoor temperature is allowed to be - 40 ~ 50 ℃.

3. Be transported and stored as non-dangerous goods.