Will The Increase in The Inlet Pipe Of The Water Pump Affect The Suction Stroke?

Sep 25, 2024

For water pumps, increasing the size of the inlet pipe generally has a certain impact on the suction stroke of the pump.
The increase in the size of the inlet pipe will cause a decrease in the speed of water running in the pipeline, thereby reducing the frictional resistance generated in the pipeline and increasing the suction stroke of the pump.
Therefore, when the size of the inlet pipe increases, the suction stroke of the pump generally increases slightly. However, if the size of the inlet pipe is too large, it will result in a loose connection between the inlet pipe and the pump, thereby affecting the pump's suction efficiency.

In addition, the length of the inlet pipe also affects the suction stroke of the pump. When the inlet pipe is relatively long, the speed of water in the pipeline will also slow down, thereby reducing frictional resistance and increasing the suction stroke of the pump. However, in the case of a long inlet pipe, due to the slower movement speed of water in the pipeline, bubbles in the water have more opportunities to detach from the water flow and gather at high places to form an air film, resulting in a decrease in the suction stroke of the pump.
Therefore, an increase in the size of the inlet pipe will have a certain impact on the suction stroke of the centrifugal pump, but the specific magnitude of the impact needs to be comprehensively considered by multiple factors. It is recommended to refer to the design parameters of the pump and the relevant suggestions provided by the pump manufacturer when selecting the size of the inlet pipe.