Misunderstandings in the use of centrifugal water pumps
1. There are many elbows used on the water inlet pipe
If many elbows are used on the water inlet pipe, the local water flow resistance will be increased. And the elbow should turn in the vertical direction, and it is not allowed to turn in the horizontal direction, so as not to gather air.
2. The bottom section of the water inlet pipe equipped with a bottom valve is not vertical
If it is installed in this way, the valve cannot be closed by itself, resulting in water leakage. The correct installation method is: the bottom section of the water inlet pipe equipped with a bottom valve is preferably vertical. If it cannot be installed vertically due to terrain conditions, the angle between the axis of the water pipe and the horizontal plane should be more than 60°.
3. Large diameter water pump with small water pipe for pumping water
Many operators think that this can increase the actual head, in fact, the actual head of the pump = total head ~ loss head. When the pump model is determined, the total head is constant; the loss head mainly comes from the pipeline resistance, the smaller the pipe diameter, the greater the resistance, and the greater the loss head, so after reducing the pipe diameter, the actual head of the pump cannot be increased. , but will decrease, resulting in a decrease in pump efficiency. In the same way, when a small-diameter water pump uses a large water pipe to pump water, the actual head of the pump will not be reduced, but the loss head will be reduced due to the reduced resistance of the pipeline, which will increase the actual head.
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