EN – 7
Two-stage
rotary vane pump
To improve the backing pressure and flowrate at low pressure, two stages are
connected in series. The second is similar to the first both structurally and operationally.
The gases pulled in by the first stage (low pressure) are transferred to the second stage
(high pressure) and discharged through the high pressure (HP) valve.
Applications Two stage rotary vane pumps are the best choice for application requiring an ultimate
vacuum as low as 3.75.10
-3
Torr (5 x 10
-3
mbar).
Note: when operating a two stage vane pump continously, greater than half an hour
- above 1.0 Torr,
- or with opened gas ballast,
the unit should be equipped with an oil mist eliminator equipped with an oil return
system.
In.
Low pressure stage
Exh.
High pressure stage
EN Introduction
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