Diffusion Pump Oil Cross-Reference
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Unlike the Turbomolecular Pump the Diffusion Pump recquires a working fluid to move gas molecules. This fluid is commonly reffered to as an oil, due to the fluids resembling oils in feel and consitency. Below is a list of various Diffusion Pump Oils and their physical properties.
Silicone Oils
VacOil
| Name | Vapor Pressure | Viscosity 25°C | Flashpoint | Condensation Point | Density |
|---|---|---|---|---|---|
| DP Grade 704 | 6.65 x 10⁻⁸ Torr | 36 mm²/s ± 4 mm²/s | ≥ 210°C | ≥ -35°C | 1050 ∼ 1080 |