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Several steps for selection of deep well submersible pump
- Apr 10, 2018 -

There are various types of deep well submersible pumps in the market. How to select the deep well pump? Below are some of the deep pump selection tips summarized by the industry:

1. Pump type according to well diameter and water quality. Different types of pumps have certain requirements for the size of borehole diameter, and the maximum outer dimension of the pump is less than 25 ~ 50mm. If the hole is skewed, the maximum size of the pump should be smaller. In short, the pump body part cannot close to the well wall, in case the pump vibration will damage the well.

2. According to the water output of the well, select the flow rate of the well pump. Each hole has an optimal amount of water in the economy, and the flow rate of the pump should be equal to or less than the amount of water that falls to the depth of the well. When the pumping amount is greater than that of the machine well, it will cause the casing collapse of the machine well and affect the service life of the well. If the amount of water is too small, the benefit of the well will not be fully realized. Therefore, the best method is to carry out pumping test for the well, and the water well may provide the maximum amount of water for the selected well pump flow. The pump flow rate shall be based on the number of the label or the number indicated in the book.

3. according to the drawdown of depth and the water pipe head loss, determine the head of well pump actual need, the well pump lift, it is the vertical distance from water level to the pool surface such as net (lift) and loss Cheng. Loss head is usually 6 ~ 9% of net lift, usually 1 ~ 2m. At the bottom of the pump, the depth of the impeller inlet is 1 ~ 1.5m. The total length of the underground part of the water pump should not exceed the maximum length specified in the pump specification.

4. The machine well that indicates that the well water contains more than one part of a million is not suitable for the installation of the deep well pump. Because the well water content is too large, if more than 0.1%, it will accelerate the abrasion of rubber bearing, cause water pump vibration, shorten pump life.

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