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Question:

Water pump eliminates air

Why should the pump fill the air before running? What's the reason why the water doesn't go up?

Answer:

Because the pump is rotated to the water from the center of the impeller thrown out, while the water inlet has been filled recently. If there is air, water can not be pumped out
By rotating the water pump is thrown from the impeller center, resulting in pressure, the back of the water sucking over, this is the pump working principle, if air, air will not be left out without impeller, the flow rule, no pressure, so we can not draw water!
First of all, why should exhaust air, pump suction principle is the rotation of the impeller, pump water inside the throw out, and then let the inlet pipe into a vacuum. Then, under the influence of atmospheric pressure, the water pressure is pumped into the pump. Therefore, if the water is not filled, the sealing of the pump is impossible to pump the air inside the evacuation of high vacuum. In other words, do not fill the water, you can not smoke water. You can hear the noise in the pump when the water bubbles under the bottom vacuumThe water doesn't go up because it doesn't have enough vacuum!The reason 1 is because there is no water filling,2, because your pump and water vertical height higher than the pump itself suction stroke.3., the pipeline resistance is too large (including the pipe diameter is too small, elbow and so on)

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