275# vacuum diffusion pump oil

Equal to Dow Corning 705 , MT-705, Santovac 5 And Octoil.

Structure formula

C6H5 CH3 C6H5
︱ ︱ ︱
CH3—Si—〔—Si—〕n—Si—CH3
︱ ︱ ︱
C6H5 C6H5 C6H5

n＝1



2. Properties
Property Value
Viscosity(25°C )mm2/s 165 ~ 185
Diopter 25°C 1.5765 ~ 1.5785
Specific Gravity 1.090 ~ 1.100
Flash Point °C Min. 240
Condensation Point °C -14 ~ 18
Minimal Vacuum Level , Pa Max. 6.65 X 10-8
saturated vapor pressure, Pa Max. 6.65 X 10-9
3. Applications:
It possesses excellent heat-stability, good resistance to oxidation and radiation. Its saturation vapour pressure is very low under room temperature, and changes sharply with the variation of temperature.The minimal vacuum level can reach 10-9mmHg , so the fluid is most suitable to be used in High Vacuum Diffusion Pump.
It is widely used in High Vacuum Diffusion Pump of electronic industry, metallurgic industry, instrument manufacture industry, and also widely used as transmission liquid and heat-carrier at high temperature in instruments.
4. Transportation:
Transport as non-hazardous chemicals,keeping away from rain and sunlight.
Shelf life: 2 years. It still can be used after being tested and qualified when exceeding the shelf life

5. Packing
275# Vacuum Diffusion Pump Silicone Oil is available in 200 kg Iron Drum, 25/50kg plastic Drums.