Page 18 - Know and Understand Centrifugal Pumps
P. 18

Basic Pump


                              Principles













       In trod uct ion

        Pumps  are  used  to transfer  liquids  from  low-pressure  zones  to  high-
        pressure zones:

                    50 LBS                                 60 LBS
                          -  -
                                                 r


                  L                                        55 LBS

                    55 LBS






       Fiqure 1-1

        Without a pump in this system, the liquid would move in the opposite
        direction because of the pressure differential.
        Pumps are also used to move liquids from a low elevation into a higher
        elevation,  and  to move  liquids  from one place  to another. Pumps  are
        also used to accelerate liquids through pipes.



       How do pumps work?

        The  fluid  arrives  at the  pump  suction  nozzle  as  it flows through  the
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