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Mineral Diffusion Pump Fluid
Mineral Diffusion Pump Fluid
prepared by molecular distillation from mineral
stock are having high pumping speeds and low
saturated vapor pressures and used down to
10-7
mm Hg.
This Diffusion Pump Oil is heat treated to remove products of decomposition; subsequent distillations then remove the remaining light fractions and redundant high boiling Point residues. The resultant diffusion pump oil is thermally stable and narrow in molecular weight distribution.
Packing
1 kg, 3.5 kg and 5 kg
S-704, Silicone Diffusion Pump Fluid
Properties and Applications
Silicon fluid is a poor lubricant. 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 10-9
mm Hg; so the fluid is most suitable to be used in High Vacuum Diffusion Pump thus find wide application in frequently cycled industrial plants.
It is wildly used in electronic industry, metallurgic industry, instrument manufacture industry, and also widely used as transmission liquid and heat-carrier at high temperature in instruments.
This oil can be transport as non-hazardous chemical.
When keep away from rain and sunlight, shelf time is more then 3 years. In the case of being over the shelf time, it still can be used after it being tested and qualified.
Specification
| Chemical Name | : TetraMethyl TetraPhenyl TriSiloxane |
| Molecular formula | :
CH3-Si(C6H5)-O-Si(CH3)2-O-Si(C6H5)2-CH3 |
| Viscosity
(25oC), mm2/s | : 40 ~ 44 |
| Diopter (25o C) | : 1.5500 ~ 1.5600 |
| Specific Gravity | : 1.0600 ~ 1.0700 |
| Flash Point, oC
| : => 210 |
| Condensation Point,
oC | : < = -38 |
| Minimal Vacuum Level, mm Hg | : < = 1 x
10-7 |
| Saturation Vapour pressure, mm Hg | : < = 5 x 10-8
|
| Color (Pt-Co Method by Eye) | : < = 40 |
Typical Data of the fluid in contact with air during working time.
|
Times of contact with air
(sec.)
| 0 | 350 | 700 | 1000
| | Ultimate
Pressures 10-8 Torr | 0.8 | 0.8 | 0.8 | 0.5
| | Diopter
(25O C) | 1.557 | 1.557 | 1.557 | 1.557
| | Viscosity
(25O C) | 38.4 | 38.0 | 37.9 | 37.9
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Packing
1 kg and 5 kg
Vapour Booster Pump Fluid
A vapour booster pump fluid derived from a first class hydrocarbon starting material, protected against air abuse by an anti-oxidant of matched vapour pressure, principally used where high gas loads are encountered at pressures of a few microns.
Saturated Vapour Pressure at 20oC = 5.0 x 10-6 mbar.
Packing
3.5 kg and 5 kg
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