Diffusion pump oil diffusion pump for various types of glass and metal working fluid, low saturated vapor pressure and good thermal stability and superior oxidation resistance, used in a variety of high vacuum industries, such as high vacuum coatingoptical coating, high vacuum smelting industry, high-vacuum sintering brazing industrial vacuum distillation, the atomic energy industry requirements for high vacuum environment system.
This product is a work of the various types of glass and metal diffusion pump fluid,low saturated vapor pressure and good thermal stability and superior antioxidant properties, used in a variety of high vacuum industry, such as high vacuum coating opticalcoating, high vacuum smelting industry, high-vacuum sintering brazing industrial vacuum distillation, the atomic energy industry requirements for high vacuum environment system.
The product is a booster pump working fluid of various types of glass and metal, low saturated vapor pressure and good thermal stability and excellent oxidation resistance, used in a variety of high vacuum industry, such as high vacuum smelting industry, vacuum distillation, plastics continuous metallisation, tube industry, high vacuum layer ENERGY accelerators and electron microscopes, monitors, etc.
Silicone oil of Diffusion pump as sample：
| Item/Grade | HFV-KS274 | HFV-KS275 | Experimental Method |
| Kinematic viscosity(40oC)，mm2/s | 38~42 | 165~185 | GB/T265 |
| Refractive Index25℃ | 1.550~1.560 | 1.5765~1.5787 | GB/T614 |
| Spcoifio Gravityd2525 | 1.060~1.070 | 1.090~1.100 | GB/T1884 |
| Flash point(open cup)，℃ | 210 | 243 | GB/T3536 |
| Saturation Vapor Pressure , kpa 25℃ | 5.0×10-9 | 5.0×10-9 | SH/T0293 |
| Limiting vacuum，kpa | 1.0×10-8 | 5.0×10-9 | SH/T0294 |
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