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Aug . 22, 2024 17:52 Back to list

Frequently asked questions about deep-well pumps

Frequently asked questions about deep-well pumps

What are the differences between pumps for a deep well and a dug (coil) well?

. In principle, there are no major differences. A submersible pump installed in a dug (vertebrate) well should have an additional special jacket to ensure the flow of water along the motor at the appropriate speed, thereby optimizing cooling conditions. There are also special submersible pumps, structurally adapted to be installed in the vertebral wells (dug, cobbled).

On what basis is the diameter of a submersible pump selected?

The diameter of a submersible pump is the result of the required and expected operating parameters (capacity and head) and the internal diameter of the deep well. The selection of a pump is primarily to determine its parameters (capacity and head). The submersible pump should be of such a diameter that it freely enters the well bore.

What are the consequences of the wrong diameter of the submersible pump?

Poorly selected diameter of the pump, is on the one hand (too large diameter) the risk of jamming, the pump during installation in the deep well, and on the other hand (too small) do not provide adequate cooling conditions for the deep-sea motor.

What parameters of the well should be taken into account when selecting the capacity of a submersible pump?

The correct selection of a submersible pump is a compromise between the requirements of the system to be supplied and the operating capacity determined during test pumping after the construction of a deep well.

Should the quality/composition of the well water determine the choice of submersible pump model?

The chemical composition of the pumped water determines the choice of the appropriate material design of the pump and the way it is operated (the need to periodically remove the pump and remove iron and manganese deposits from the surface of the motor). The frequency of these procedures depends on the content of iron and manganese in the water.

200QJ Deep Well Submersible Pump



Should every submersible pump be connected to a hydrophore tank?

It all depends on the purpose of the installation being powered. If the pump operates at a fixed capacity (a strictly defined operating point, such as an irrigation system, supplying a tower tank) then the tank is used only as protection against hydraulic shock (for direct start) and for protection of the pressure switch (pressure switch). If the object being supplied is a highly variable demand (e.g., a single-family house), in order to avoid too frequent activation of the pump, it is necessary to use an appropriately sized hydrophore tank. In this case, the larger the tank the better for the pumping system. The limitation is the space in which we can install the tank.
 

What can result from a missing or improperly sized hydrophore tank?

If the use of a hydrophore tank is required, its improper selection (too small usable volume of the tank) will result in frequent pump switching, which will increase energy consumption, faster wear and tear of the pump and the deep-well motor.

There are submersible pumps on the market, both with the entire power supply kit and models with only a small length of wire leading out. What are the advantages and disadvantages of both these solutions?

It all depends on what to understand as "supply set". The pump manufacturer never knows at what depth the submersible pump will be installed. The power cable is selected according to the depth of the pump in the well. Sometimes it may be associated (due to the required length of the power cable) with a change in the cross-section of the power cable conductors. The pump unit, with some manufacturers, can be ordered with the appropriate cable and length. With a ready-made power cord and starting system (plug with starting capacitor) are offered, usually, pumps with single-phase motors up to 2.20 kW.

What to consider when choosing supply lines for a submersible pump?

In the first place by the rated current of the motor to be powered and the length of the cable due to the depth of the pump. There are power cables available on the market specifically designed to power submersible pumps.

What type of pipe is recommended for connection to a submersible pump?

It all depends on the diameter and weight of the deepwater unit. There are used discharge pipes (discharge column) made of PE, as well as steel pipes (stainless or galvanized) connected by flanged connections or threaded couplings. The connection should be made in accordance with the art. The type of discharge pipe used depends on the size of the pump used, the required flow rate and the depth of suspension. For 2" discharge connections, as a rule, plastic discharge piping is used. Above this diameter - steel.

What to consider when choosing supply lines for a submersible pump?

Fittings used in installations with a submersible pump should be of the appropriate nominal diameter (equal to or greater than the pump discharge connection) and for a maximum pressure greater than the maximum pressure generated by the pump minus the depth of the static water table in the well.

Should the deep-well pump be removed from the well for the winter?

Do not remove the deep-well pump from the well for the winter.

What maintenance do deep-well pumps require?

Deep-well pumps are maintenance-free. They do not require special maintenance. Removal of a deep-well pump from a well may be due to the need to clean iron and manganese deposits deposited on the surface of the motor and in the suction basket area. In this case, it is enough to effectively clean the outside of the pump with a pressure washer without taking it apart.

What solutions in modern deep-well pumps affect the energy efficiency of these devices?

The primary indicator of the energy efficiency of deep-well pumps is their efficiency. Not without influence is the way the pump is selected to suit the individual conditions of the intake and the plant being supplied. A poorly selected pump will not work efficiently.

What solutions should you pay attention to in order to make sure that you choose a device that will work without fail for many years?

Attention should be paid to the accuracy of the selection of deep-well pumps (but this is the result of the data package - information provided by the investor). The motor of a deep-well pump, at any point in the catalog characteristics, should have a power greater than the power required at the pump shaft.


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