The effect of pipe enlargement on the pump

The effect of pipe enlargement on the pump

Many people think that the pump inlet piping bigger can improve the suction of the pump, usually need to function of self-priming pump, such as selection of self-priming pump products, pipe larger effect on the water pump will actually, because of the increased pipe led to a decline in self-priming pump self-priming capacity.When the pump model is determined, the inlet pipe is certain;Must agree and self-priming pump inlet diameter, while the main pipe after bigger becomes smaller, but the larger diameter pipe cross-sectional area after get bigger, so the air inside the pipeline more, water pump not only short of actual suction, but also decreases, resulting in a decline in the pump efficiency.
Similarly, when the small diameter pipe pumps pump, the pump will not reduce the actual lift, it will decrease the lift force due to the resistance line loss, and improve the actual water head.People also think that pipeline centrifugal pump outlet pipe, it will greatly increase the power load, they think that the increase of the diameter, this will greatly increase the power load, as you all know, the size of the liquid pressure and improve the level and cross sectional area has nothing to do with the size of the pipe, as long as there is a certain ascend, pump impeller size remains the same, no matter what kind of diameter, the function of the stress on the blade is for sure.As the diameter increases, the flow decreases due to increased volume resistances, and the power consumption increases appropriately.However, as long as the nominal head diameter increases the pump can work normally also can reduce the pipeline loss, improve the efficiency of the pump.