End-of-Life Information

Grundfos MMS submersible motors must be disposed of according to local regulations by using a public or private waste collection service. If this is not possible, contact the nearest Grundfos company or service workshop.

Safety risks

Safety risk related to materials used

  • MMS submersible motors contains motor liquid with monopropylene glycol.
  • Grinding in SS poses risk of dust with Cr and Ni.

Safety risk related to handling the product

  • Electrically burned motors can contain health hazardous substances formed by burning of various insulation materials.
  • Motor and motor liquid can contain substances present in the media it has been in (pay attention in case of radioactive media – biological growth etc.)

Disassembly of the product

  • Submersible motor can be disassembled into main components using standard tools.
  • Shaft can be pressed out of rotor core.
  • Rotor core can be recycled by use of shredder technology to separate the different materials, copper or aluminium and electro steel.


NameMaterialSpecial disassembly considerations
1Sand shield + diaphragmRubber or SS plate 
2Shaft seal  Rubber + SS plate +seal faces in carbon, ceramic or silicon carbide 
 Motor liquidMonopropylene glycol + water 
3NEMA flangeCast iron or SS castingCarbon bush (press fit)
4Winding houseCast iron or SS casting 
5Shaft  Shaft extension + N - side in SS, rest in mild steel.
Balancing rings in mild steel
Friction welding zones under balancing rings.
 Rotor coreLamination – electro steel.
Copper bars + copper short circuiting rings alternative die cast aluminium
6Thrust bearing rotating

Cast iron + carbon or ceramic ring


7Thrust bearing stationaryCarbon shoes
Mesh - SS 1.4301
Support – cast iron
MMS6; SS casting
MMS12000; brass with vulcanised rubber
Some contains antimon
8End shieldCast iron or SS casting 
9StatorLamination – electro steel
Winding wire – copper insulated with PVC or PE/PA
Insulation material - polyester
 External bolts and nutsSS grade 
Additional materials:   
5n. MMS