Leybold vacuum pump oil and maintenance

■Seal—prevent the atmosphere from entering the exhaust valve, and have a gap seal between relative moving parts (rotor and stator, rotor and rotor slot ■Lubrication-lubrication between relative moving parts to reduce wear

■Cooling—The oil circulates between the pump and the oil tank to dissipate heat and cool.

■Carrying—Entrap the dust particles or other particles produced by wear in the oil to reduce wear damage

■Protection—form a protective oil film to prevent water and chemical vapor condensation from corroding the internal parts of the pump Leybold vacuum pump oil performance requirements

■The saturated vapor pressure at high temperature should be low, and the volatile components should be less.

■ Lowest water content and water absorption

■It must have a certain viscosity and small change with temperature (the viscosity temperature rise curve is smooth)

■Good lubricating performance, good crack resistance under mechanical stress.

■Anti-corrosion, anti-oxidation, stable chemical performance For most applications, Leybold Vacuum pumps use standard oils under the Leybold Vacuum brand. The oil models are LVO100 (N62), LVO120 (GS32), LVO130 (GS77), LVO140 (FM32), LVO150 (FM68), LVO210 (GS555) It has suitable chemical and thermal stability, resistance to hydrolysis, and good compatibility with sealing materials. For some special applications, standard oils have poor stability at high temperatures. Chemical reactions (acids, bases, halogens) are less sensitive.

■When encountering strong oxidants (oxygen), the mood is poor

■Poor solubility to non-polar substances (wax, grease). Poor solubility to polar substances (oligomers, resins, decomposition products, especially crystals) and polymers