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How to Choose Deep Well Pump?

Feb. 21, 2021

A deep well pump is a vertical multistage centrifugal pump that lifts water from deep wells. With the decline of the groundwater level, the use of deep well pumps is more widely used than general centrifugal pumps. However, some users, due to improper selection, have problems such as not fitting in, not enough water coming out, not being able to pump water, or even damaging the well. So, deep well pump supplier will explain how to choose deep well pump?

1.According to the maximum allowable extraction volume of the water source well

The pump volume must be in line with the actual amount of water in the well, the pump volume must be equal to or slightly less than the actual mining volume of the water source well, otherwise it is bound to produce strong pumping, not only will shorten the service life of the deep well submersible pump, will seriously destroy the filter, resulting in more than sand, and even cause the well to be scrapped.

2.The diameter of the deep well pump must be consistent with the diameter of the well body

In order to make the deep well pump up and down smoothly, pumping groundwater space can be quickly gathered, not subject to resistance can also reduce the wear and tear of the pump operation, the requirements of the water pipe and pump body parts of the well body diameter to be greater than the maximum diameter of the pump body 20 ~ 40 mm, that is, the maximum diameter of the pump body parts and well wall between the ring gap to have 10 ~ 20 mm, in order to extend the service life of the well and deep well submersible pump.

Long Shaft Deep Well Pump

3.Deep well pump pump body down well location

Deep well submersible pump pump head, absolutely not under the filter tube (flower tube) location, must be under the well wall tube (solid tube) location, otherwise pumping will gush sand more than or will be well clumsy destruction. To be based on the electrical curve of the probe hole interpretation, by the well A, B both sides, according to the well and the adjacent water source well hydrogeological conditions (aquifer depth, aquifer thickness, aquifer lithology) and pump operation, to decide the well structure (well diameter, flower pipe, real pipe location) and well depth and pump selection, to ensure that in the future, the pump and pump operation process, no problems.

4. According to the allowable extraction volume of water source wells

Select the deep well submersible pump, under the condition of hydrogeology allowed, and according to the water source well gushing water, determine the specification and model of deep well submersible pump, so as to determine the reasonable structure of the water source well.

5. Select deep well pump according to the total loss of pressure head

According to the deep well submersible pump to lift the groundwater from the pump head to the ground pool or water tower, the total loss of pressure required to select the flow rate, head (number of stages) and power of the deep well submersible pump. The water pressure increases proportionally with the number of impellers flowing through it. The impeller of the deep well pump is submerged in water and has only head but no suction range. Rated head and the actual operating head of the pump, can not be too big a difference, absolutely not higher than the actual head of 25%. High pump head, the required motor power, easy to cause the pump has a large string, the lighter wear impeller and leaf shell, the heavier in the shell of the bearing (to play a limiting role) easy to stick with the pump coupling, resulting in the pump can not run, motor overload winding will burn out.

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