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Why must some liquids pass through a tubular centrifuge more than once?
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centrifuge
Figure 1: Tubular centrifuge
In a tubular centrifuge, liquids must sometimes pass through the machine more than once because the initial separation process is often incomplete.1
When the centrifuge is used for continuous separation, the feed material flows from one end of the tube to the other while the machine is in operation. Because this process may not fully isolate the desired fractions in a single pass, the separated material is cycled through the centrifuge multiple times to achieve the necessary level of purity or separation.1