A submersible pump as the name indicates A submersible electric motor and pump consists of an submerged in the water.
By submerging electric motors and pumps, large economy can be achieved by avoiding long shaft, large number of bearing and large sized rising main etc.
The complication due to thrusts are also avoided
As it is a submersible pump, the only problem is 10 prevent the motor winding and other electrical connections to be spoiled by water coming in contact.
For this purpose a special protection by suitable type of insulation is provided to prevent the flow of electric current and flow of water inside the assembly.
These pumps are vertical and horizontal centrifugal pumps with radial or mixed flow impellers.
All the metallic bearings are water lubricated and protected against the sand. A non-return valve is fitted to a flange at the top of the pump
Motor of the submersible pumps is wet squirrel cage type and is completely filled with water. Thrust bearings are provided for absorbing the axial thrust.
The total efficiency of these pumps is superior to conventional deep well pumps at much cheaper costs.
It is used for drinking and irrigation water pumping. drainage sewage pumping, slurry pumping, industrial pumping etc.
