In general, the principle of an optional Roots vacuum pump is as follows:
1, Requires pre-pump caused by the main pump work required for the pre-vacuum conditions.
2, the maximum allowable discharge pressure of the main pump, the former pump must discharge the maximum amount of gas discharged from the main pump in time, the former pump pumping speed in accordance with the actual pumping speed at the actual pumping speed.
3, doubles as pre-pumping pump to meet the pre-pumping time and pre-pumping vacuum requirements.
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