MMS Series

Grundfos has been making submersible motors for more than 30 years and is one of the world’s largest manufacturers of high-quality submersible motors. The MMS submersible motors are not only rated among the very best on the market for use with submersible pumps of any make, they are also designed to be the perfect fit for the SP pumps, matching their best duty points.

The MMS range of rewindable motors is available in sizes 6″, 8″, 10″, and 12″ up to 250 kW. They are suitable for any submersible installation, including heavy-duty industrial applications and dewatering operations.

  • Features
  • Applications
  • Tech Specs

Exchangeable shaft seal

The standard machanical shaft seal used in the MMS motors is very easy to service and replace. For applications that involve sand or abrasives, a SiC/SiC sand-resistant shaft seal is also available.

Corrosion resistant

The MMS motors are available in stainless steel to match the corrosion resistance of the SP pump units. Extra high-grade steel versions for aggressive liquids also available.

Rewindable motor

In MMS motors the stator can be rewound locally, ensuring minimal cost and downtime.

High thrust capacity

Michell-type thrust bearings with high thrust capa-city. Quickly builds up a water film during start-up to ensure high thrust capacity.

Motor protection and monitoring

Optimise reliability and monitor performance with electronic motor protection (MP 204) or a Variable Frequency Converter (CUE) and a remote monitoring system (Grundfos Remote Management).

Warm water versions

Available for temperatures up to 50°C for MMS motor series.

  • Drip micro spray
  • Frost protection
  • Irrigation groundwater supply
  • Pivot pressure boosting
Phase 3 phase
Start/run methods DOL, SD
Frequency  50 and 60 Hz
Voltage  200-1000 V
Thrust load  6″, 15 kN or 27.5 kN 8″ and 10″, 50 kN 12″, 70 kN
Efficiency  70-91
Insulation class  A
Mechanical connection  6″ and 8″ with Nema flange
Material  Stainless steel EN 1.4301 (AISI 304) stator tube with cast iron endbells EN-JL-1040, all-stainless steel EN 1.4401 (AISI 316L), or all-stainless steel EN 1.4539 (AISI 904L)
Certification CE
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