Pfeiffer Vacuum A Passion for Perfection

2.2.3.3 Operating fluid selection

Because operating fluid comes into contact with the medium to be pumped, it is exposed to the influences of the medium in question. Consequently, operating fluid should be selected on an individual basis in accordance with the respective application. Pfeiffer Vacuum offers four different types of operating fluids that are suitable for all major applications. The pumps are factory-set for the respective operating fluid.

The ultimate pressures of the rotary vane vacuum pumps that are specified in the catalog can only be ensured when using the operating fluid recommended by Pfeiffer Vacuum. The manufacturer cannot accept any liability for damage attributable to the use of other operating fluids. Different types of oil should never be mixed. Some oils do not mix and can thus cause damage to the pumping system.

Table 2.7: Oil types for backing pumps and Roots pumps

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