GRUNDFOS SP submersible pumps are designed specifically for borehole supply applications. They are of multistage centrifugal impeller design and all parts are made from stainless steel with water lubricated rubber bearings. A submersible motor is fitted beneath the pump and suction is effected through a strainer between the pump and motor.

Standard pumps are designed for the pumping of non-aggressive water. 'N and R' versions are available for applications requiring a higher degree of corrosion resistance.

All SP pumps carry a drinking water approval and meet European Minimum Efficiency Index guidelines

The pump is coupled to a sealed, liquid cooled 2-pole asynchronous GRUNDFOS motor constructed of stainless steel with ceramic bearings. All motors are also fitted with a built-in sensor which monitors running temperatures. When fitted with the patented GRUNDFOS MP 204 control unit protection is provided against dry running, mechanical motor defects, excessive motor running temperature and irregular power supply. The fitting of MP204unit is recommended for motor control and monitoring and also extended motor life.

Note that irrespective of the fitting of MP 204 control unit a remote starter is required. Due to the low starting torques of submersible motors it is recommended that Direct-on-Line starters are used on motor sizes up to 22kW. Motors above this size should use a soft start arrangement.

Enclosure Class: IP58
Insulation Class: F
Voltage: 3x415V
Speed: 2900rpm


Pumped Liquid: Thin, clean chemically non-aggressive liquids without solid particles or fibres.
Max. Liquid Temperature: +40°C. 
Max. Water Depth: 600m
Min. Borehole Diameter: 200mm - MS6/MMS6000, 254mm - MMS8000


Model Motor Full Load Current (A) Istart / I Motor Dimensions (mm) Weight (kg)
SP 77-3 11 15 24.6 4.8 MS6 1557 683 874 143 200 75
SP 77-5 18.5 25 41.5 4.8 MS6 1914 784 1131 146 200 95
SP 77-7 26 35 57.5 5.2 MS6 2290 903 1387 143 200 114
SP 77-9 30 40 65 5.3 MS6 2611 968 1643 143 200 129
SP 77-11 37 50 80 4.3 MMS6000 3339 1425 1898 144 200 184
SP 77-13 55 74 114 5.9 MMS8000 3522 1350 2172 192 209 259