Description
26
GA03107_002_A4 - 09/2015 - © Oerlikon Leybold Vacuum
In practice, the maximum attainable pressure differential is significant only in
the rough vacuum range (p > 10 mbar), whereas for pressures in the fine
vacuum range (p < 1 mbar) the attainable compression ratio is decisive.
RUVAC WA/WAU pumps have been specifically designed for operation in the
rough and fine vacuum ranges. They are thus either used in connection with
backing pumps or in closed gas cycles.
Power consumption of the pump depends on
■
the volume of the pump chamber
■
the speed of the pump
■
the existing pressure range
■
the pressure difference between the inlet and the discharge flange (see fig. 1.7)
■
and the type of gas to be pumped.
Fig. 1.2 Functional diagram of a Roots pump (vertical flow)
Fig. 1.1 Schematic cross-section of a Roots pump (vertical flow)
1
2
3
4
5
1 Intake flange
2 Pumping chamber
3 Casing
4 Impeller
5 Discharge flange
Summary of Contents for RUVAC WA
Page 67: ...Notes 67 GA03107_002_A4 09 2015 Oerlikon Leybold Vacuum ...
Page 68: ...68 GA03107_002_A4 09 2015 Oerlikon Leybold Vacuum EC Declaration of Conformity ...
Page 69: ...69 GA03107_002_A4 09 2015 Oerlikon Leybold Vacuum EC Incorporation Declaration ...
Page 71: ...Index 71 GA03107_002_A4 09 2015 Oerlikon Leybold Vacuum ...
