Fisher – Eight Misconceptions About Using Pipeline Pumps

Create Date: 2024-8-30 12:03:23|Source: Fisher

1. The pipeline of the pipeline centrifugal pump is matched

Some users of pipeline centrifugal pumps think that this can improve the actual head, but in fact, the actual head of the pump = total head - loss head. When the pump model is determined, the total head is fixed; The loss head mainly comes from the pipeline resistance, the smaller the pipe diameter, the greater the resistance, so the greater the loss head, so after reducing the pipe diameter, the actual head of the pump can not only not increase, but will decrease, resulting in a decrease in pump efficiency. In the same way, when the small diameter pump is pumped with a large water pipe, the actual head of the pump will not be reduced, but the loss head will be reduced due to the decrease of the resistance of the pipeline, so that the actual head will be improved.

They also think that when a small diameter pump is pumped with a large water pipe, it will inevitably greatly increase the load of the motor, and they believe that after the pipe diameter increases, the pressure of the water in the outlet pipe on the impeller of the pump will be greater, so the motor load will be greatly increased. As everyone knows, the size of the liquid pressure is only related to the head, but not to the cross-sectional area of the water pipe. As long as the head is constant, the size of the impeller of the pump remains unchanged, and the pressure acting on the impeller is constant no matter how large the pipe diameter is.

Fisher – Eight Misconceptions About Using Pipeline Pumps

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