Fluid Engineering: How a Centrifugal Pump Moves Water
A spinning impeller sends water high and far
0:52 · 720p · With AI narration and captions. This sample was made with the same system as this service.
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Inside a Centrifugal Pump
Let's look at how a centrifugal pump moves water in buildings and factories.
Inside the Pump
A centrifugal pump consists of a motor-driven impeller and a spiral casing that surrounds it.
Flinging Water Outward
Water enters through the inlet at the center, and the spinning impeller flings it outward, so it gains speed.
Speed Becomes Pressure
In the casing, which widens toward the outlet, the water slows down, and its pressure rises accordingly.
Up to the Roof
The water pushed out travels up the pipe to the roof tank. At the center, the pressure drops, and more water is drawn in.
Priming Is Needed
However, a pump full of air can't move water. Before running, it must be filled with water, which is called priming.
Turning Speed into Pressure
A centrifugal pump gives water speed with its impeller, then turns that speed into pressure in the casing to send the water out.
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