| 摘要 |
A vacuum installation (2) comprises a vacuum chamber (4) having an inlet (24) for aspirating a quantity of liquid or particulate material. A cyclone separation unit (6) comprising a plurality of cyclones (10), communicating in parallel with the interior of the vacuum chamber is connected to a vacuum pump (20) to draw air from the vacuum chamber through the cyclones and induce a separating vortex flow within the cyclones. A controller (50) is arranged to control the vacuum pump to provide a chosen flow rate and to selectively deactivate one or more of the cyclones according to the chosen flow rate. |
