why screw pumps are used instead of centifugal pump?

Answer Posted / dhruv

compact design of screw pump can result in dishcrge
pressure at low speed while in centrifugal comp.if we want
the same pressure then hig sppe/big casing/big
impeller/more vibration/big motor-so to ever come all these
screw is better then centi pump-screw is able to pump
viscous material also while centrifugal-willlbe less
eficiency.

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