October 2025 — Prom-nasos.com.ua
Submersible pumps of the 4SD 6/23-2.2 380V series are reliable and efficient units used for supplying clean water from medium and deep wells. However, even with proper operation, over time there may arise a need to replace the pump section. This is a normal process of wear of the impellers and hydraulic components, as the pump operates daily under load in a water environment.
Signs that the pump section has failed:
significant drop in performance (the water flow becomes weaker);
the pump takes longer to reach operating mode;
unusual noises or vibrations are heard during operation;
the water becomes cloudy due to excessive friction between parts.
If the motor is in good condition during diagnostics and the issue lies only in the hydraulics, replacing the pump section is the most economical and correct solution.
How the replacement process works:
Removing the pump from the well.
Disconnecting the electric motor. Before disassembly, always make sure there is no voltage.
Removing the worn pump section. The old impellers and diffusers are replaced with new factory-made components.
Installing the new pump section and connecting it to the motor.
Inspection and test run. The pump is started in a water tank before being lowered into the well.
Proper operation after replacement
Always check the water quality. If the well contains a lot of sand, it is recommended to install a filter or case the lower section.
Do not allow “dry running.” Operating without water will damage the mechanical seal .
Monitor the power supply. The voltage should remain stable at 380 V ±5%. In case of phase imbalance, the motor may overheat and damage the hydraulic system.
Perform regular maintenance. Once a year, it is advisable to check the cable, couplings, suspension condition, and automation performance.
Replacing the pump section in the 4SD 6/23-2.2 380V model allows you to fully restore the pump’s performance without purchasing new equipment. Proper installation and adherence to operating conditions ensure stable operation of the unit for many years.
