The oil of the rotary vane pump must meet high requirements, especially in the case of continuous operation, the Vane Pump Manufacturers states:
Maintain low vapor pressure even at high temperatures
Excellent lubrication performance
Low oil reflux
Excellent aging resistance
Resistance to decomposition
Rotary vane pump oil B.
The rotary vane pump has excellent viscosity characteristics. It has good chemical resistance, low vapor pressure and better stability when pumping oxidants such as acidic and alkaline vapors, so it has superior performance compared to standard mineral oils. This oil is used for the first filling of RE / RZ / RC series pumps.
Many pumping materials can cause deterioration of ordinary pump oil, which can cause mechanical problems. Special oil should be used as a precautionary measure. Special oils maintain lubricity but provide limited corrosion protection. It can prevent the pump from starting at low temperatures.
Rotary vane pump oil K 8
This oil is specifically designed to pump acidic vapors, but it is highly hygroscopic and has a limited water vapor capacity. Alkaline additives are consumed during operation, so liquids must be replaced regularly - even if the pump has not been used for several days. Pump oil K 8 does not have the viscosity characteristics of low vapor pressure and B-type pump oil. Therefore the pump will not reach the specified ultimate vacuum and may not start well at temperatures <18 °C.
The synthetic oil has excellent chemical resistance. Therefore, it is usually used to pump strong oxidants (halides, nitrogen oxides, etc.). Since this type of oil cannot be mixed with mineral oil, a pump should be constructed from the beginning from this oil. All rotary vane pumps are available on request. In order to convert an existing pump to this oil, the pump must be completely disassembled, cleaned and refilled with perfluoropolyether oil by an authorized service center.