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UMA-S: The high-efficiency submersible motor for submersible borehole pumps

Once installed, submersible borehole pumps are characterised by their durability and wear resistance. Consequentially, energy costs make up 90 % of the entire life cycle costs. This is where huge savings can be made with the UMA-S synchronous motor, thus increasing the overall efficiency of your installation.

UMA-S: The high-efficiency submersible motor for submersible borehole pumps

Minimising energy costs with UMA-S

With KSB’s UMA-S synchronous submersible motor you not only provide your submersible borehole pump with a powerful and reliable partner for all fluids and operating conditions. You will also be operating your submersible borehole pump more efficiently than ever before – continuously, for decades. Because the submersible motor keeps the energy and operating costs to a minimum and helps achieve top results.

Extremely powerful, highly economical: That’s the UMA-S submersible motor.

The submersible motors’ efficiency advantages over common asynchronous motors, even at fixed speed, equal a minimum of twelve percent – at full compatibility. Combined with an integrated speed control system you can even save up to 40 percent in energy costs, thanks to the optimised operating mode.

This graphic shows a comparison between the UMA-S permanent-magnet synchronous motor and a common asynchronous squirrel-cage motor at full speed.


UMA-S submersible motor – Comparison of efficiency classes

UMA-S submersible motor – Comparison of efficiency classes

Operate your submersible borehole pump more efficiently

UMA-S is available in several ratings for 6" – 8" submersible borehole pumps. The submersible motor covers the complete range from 4.5 to 150 kW.



UPA C 150

UPA C 150

All-stainless steel single-stage or multistage centrifugal pump in ring-section design for well diameters of 150 mm (6 inches) and above.

UPA S 200

UPA S 200

Single-stage or multistage single-entry centrifugal pump in ring-section design for vertical or horizontal installation. Optionally available with lift check valve or connection branch. For well diameters of 8 inches and above.

UPA S 250

UPA S 250

Single-stage or multistage single-entry centrifugal pump in ring-section design for vertical or horizontal installation. Mixed flow hydraulic systems with impellers that can be turned down. Optionally available with lift check valve or connection branch. For well diameters of 10 inches and above.