Specifications

Presentation
57
Two-stage
rotary vane pump
Application
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 (low pressure) stage are transferred
to the second (high pressure) stage and discharged through the high pressure (HP)
valve.
Two stage rotary vane pumps are the best choice for application requiring an
ultimate vacuum as low as 10
-3
Torr (1.33 x 10
-3
mbar).
Note : when operating a two stage vane pump continously, greater than half an
hour, above 1.0 Torr, the unit should be equipped with an oil mist eliminator and
oil return system, see oil draining kit (page 63), or a single stage pump should be
used.
In.
Low pressure stage
Exh.
High pressure stage