Requirements For The Use Of Submersible Pumps For Wells

Dec 13, 2024

Don't think that all wells can use QJ type submersible pumps to meet water demand, as they also have conditions. Today, the editor will talk about the requirements for using QJ type submersible pumps for wells. After understanding, do not blindly use them when conditions do not allow. The following will mainly explain from three aspects, with specific content as follows:

1. Power requirements for QJ type submersible pump for wells:

(1) The rated frequency of the centrifugal pump is 50 Hz, and the rated voltage at the motor end should be ensured to be a three-phase AC power supply of 380+5% volts (if the user's voltage is 660 volts, special orders are required).

(2) The load power of the transformer should not exceed 75% of its capacity.

(3) When the transformer is far away from the well, the voltage drop of the transmission line should be considered. For motors with a power greater than 45KW, the distance from the transformer to the wellhead should not exceed 20 meters. When it is greater than 20 meters, the transmission line specification should be two levels larger than the cable specification, and the voltage drop of the line should be considered.

2. Water quality requirements for QJ type submersible pump for wells:

(1) Generally non corrosive clean water.

(2) The sand content in the water shall not exceed 0.01% by mass.

(3) The pH value is within the range of 6.5-8.5.

(4) The chloride ion content in water shall not exceed 400 milligrams per liter.

(5) The hydrogen sulfide content shall not exceed 1.5 milligrams per liter.

(6) The water temperature should not exceed 20 ℃.

3. QJ type submersible pump wellbore requirements:

Honest, smooth, without any protrusions or misalignment of the well casing, and the inner diameter of the well should not be less than the corresponding machine base size.

The above is the relevant introduction to the requirements for the use of QJ type submersible pumps for wells, which puts forward requirements in terms of power supply, water quality, wellbore, etc. So, not all wells can use this type of pump product, and users need to consider these influencing factors when choosing, in order to make a judgment.