Roots pump oil Roots pump Roots pump oil not only as a vacuum medium, but also on the mechanical friction point lubrication, cooling and sealing effect.
The main performance requirements:
Extremely low vapor pressure
This is the most important performance of Roots pump oil, because Roots pump requires a high degree of vacuum, the general paraffin-based narrow-cut lubricant, the proliferation of Roots pump, you can also use very low vapor pressure silicone oil or other synthetic oil .
2. Appropriate viscosity and good viscosity-temperature properties
Roots pump chamber volume changes continuously evolved to form the role of exhaust, lubricating oil should have the appropriate viscosity and viscosity-temperature characteristics.
3. Good thermal oxidation stability
Roots pumps continue to develop at a high speed. Due to the high friction between the vanes and the pump body, the oil temperature is increased. The oil products are easily oxidized and decomposed. In particular, the diffusion pumps often work under very high temperature conditions, High, reducing the degree of vacuum, therefore requiring Roots pump oil has good thermal oxidation stability.
4. Good corrosion resistance and anti-emulsification
ZJ Roots pump inhaled if it is corrosive gas, will react with the oil, corrosion pump parts; inhaled air often contain water vapor condensate water, causing Roots pump oil emulsification and corrosion of the metal, it is required to have good Anti-corrosion and anti-emulsification.
5 high flash point
The main requirements of the Roots pump does not carry light components, so as not to affect the saturated vapor pressure of oil.
6. Lower limit pressure
Extreme pressure is an important use of Roots pump oil performance indicators to understand the minimum vacuum limit pressure Roots pump ultimate pressure
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