Bypass

The term bypass means to circumvent or bridge. In centrifugal pump technology, it refers to a line that plays a key role in closed-loop control or as a balancing device. In the context of closed-loop control, it is possible to operate a centrifugal pump with a higher flow rate than that which is usable in the piping.

To this end, a bypass flow is branched off, which can either be routed back to the pump suction nozzle directly from the pump discharge nozzle through a narrow loop or reintegrated with the suction-side flow (after a delay) via different equipment such as a condenser and cooling unit.

When acting as a balancing device, the bypass is used to compensate axial thrust in boiler feed pumps.

Reasons to integrate a bypass:

  

  

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