Grundfos® MS Motors

Grundfos has been manufacturing quality submersible motors for more than 30 years, and the highly efficient Grundfos MS submersible motors are rated among the very best on the market. The MS motors are based on state-of-the-art technology that comprises highly reliable shaft seals and heavy-duty thrust bearings. High efficiency and a long operating life ensure low long-term Cost of Ownership. As one of the world’s leading pump manufacturers, we know better than anyone what is required of a reliable submersible motor. The Grundfos motors are suitable for all makes of submersible pumps, including the comprehensive Grundfos SP range.The canned MS motors are available in 4” and 6” versions. A range of specially designed MS industrial versions with increased efficiency and longer operation lifetime is also available.

The MS 4000 and MS 6000 series are designed for use in a variety of applications in water supply. When equipped with features like oversized motor, temperature measurement, cooling jacket, and SiC/SiC mechanical shaft seals, these versions are suitable for heavy-duty industrial applications such as dewatering operations.

Motor head NEMA standard mounting dimensions utilizing four, 5/16” x 24 UNF threaded studs

Monitoring Motor protection and energy monitoring possible with remote monitoring equipment MTP75 control unit, CU 3 control unit, SM 100 sensor module, R100 remote control, G100 gateway and data logger

High efficiency High motor efficiency provides energy savings
Industrial and warm water versions available Extra high efficiency and increased operation lifetime
Thrust bearing Heavy-duty 1500 lb. Mitchell-type thrust bearing
Shaft seal Mechanical ceramic/tungsten carbide shaft seal is standard on MS 4000 and MS 6000. SiC/SiC shaft seal optional on MS 4000 and MS 6000 for water with high sand content
Motor fill fluidSML2 fluid filled motor design provides bearing lubrication

Corrosion resistance High-grade materials provide high corrosion resistance. AISI 304 (DIN W.-Nr. 1.4301) stainless steel-standard, AISI 904 L (DIN W.-Nr. 1.4539) stainless steel-optional.

For aggressive water the motor can be supplied with Viton® elastomers vs. standard NBRCable XLPE cross-linked polyethylene.