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Thread: Centrifugal Pump Problem

  1. #1
    betti Guest

    Centrifugal Pump Problem

    Dear All
    We have incountered a new strange problem in our site. we have two similar centrifugal pump for pumping water(according to the lable: capacity=360MCH, RPM=1500, H=110M, INLET=10", OUTLET=8") that one of them is coupled to an engine and doesn't have any problem and another is coupled to an electrical motor, in this case when we open a lot of branches, the electrical motor will trip (whiles we expect decreasing the flow not motor tripping ) and if we close half of the pump inlet valve, the tripping problem doesn't occer. Our electrical maintenance group has reported us that there is no problem in electrical motor.
    It will be appreciated if anybody help us to troubleshoot.
    thank you
    betti

  2. #2
    Teus Tuinenburg

    Professional Experience 55 Years / 8 Month Teus Tuinenburg has 55 Years and 8 Month professional experience

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    Dear betti,

    The problem seems to be an obvious one.

    The diesel engine drive has enough power for the full pressure- and flow range under which that centrifugal pump is operating.

    And the electric motor drive has not enough power for the full pressure- and flow range under which that centrifugal pump is operating.

    When you open branches in the system, the system resistance decreases and therefore the flow increases.
    The combination resistance pressure times flow determines the required drive power.
    If the flow increases more than the pressure decreases, the required power increases.
    Most likely, the electric motor cannot deliver that increased power demand.

    Examine the flow-pressure- power curves of the pump and compare these curves with the curves of the e-motor.

    Probably, you need a bigger e-motor.

    Success
    Teus
    Teus

  3. A centrifugal pump increases the speed of a liquid in a pipe system by using a rotating impeller. An impeller is built inside the pump itself and is responsible for moving the liquid into the pump.

  4. #4

    Centrifugal Pump Manufacturer In Gujarat

    Quote Originally Posted by seely View Post
    A centrifugal pump increases the speed of a liquid in a pipe system by using a rotating impeller. An impeller is built inside the pump itself and is responsible for moving the liquid into the pump.
    thanks for sharing this with me and others,


    Everestindustries - Manufacturer and Supplier of Centrifugal Pump & Plate Lifting Clamp

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