End-of-Life Information

Grundfos MS4000 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

  • MS4000 contains motor liquid with monopropylene glycol.
  • Hermetically sealed stator with embedding material – risk of explosion if exposed to temperature > 120 deg C.
  • 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 – tungsten carbide bushes in bearing areas are present.
  • Stator + rotor core can be recycled by use of shredder technology to separate the different materials, copper, SS, electro steel and insulation materials.


NameMaterialSpecial disassembly considerations
1+2Sand shield + diaphragmRubber 
11Shaft seal housingSS casting 
 Motor liquidMonopropylene glycol + water 
10Shaft sealRubber + seal faces (tungsten carbide and or ceramic) 
7ShaftShaft extension in SS, rest in mild steelTungsten carbide rings can be heated to release them from shaft
 Rotor coreLamination – electro steel
Copper bars + short circuiting rings
8Bearing bracketMild steel + ceramic bushesPress fit
5Upper bearing pipeCast iron + ceramic bushesPress fit
7Thrust bearing rotatingCast iron + ceramic ringGlued
8Thrust bearing stationaryCarbon shoes
Mesh - SS 1.4301
Support – cast iron
Some contains antimon
5+9Locking ring + bearing retainerMild steel 
11End shieldSS plate 
9Hermetically sealed statorShell + end cover  – SS 1.4301
Top – SS casting
Embedding material – sand and epoxy
Winding wire – Insulated copper
Stator lamination – electro steel
Some stators with small PCB in top.
 Bolts and nutsSS grade 
Additional materials:    
5l. MS4000