Submersible Motor Pumps

Application

For  Pumping of clean, cold water, non corrosive and non abrasive to the pump set material, irrigation, urban & rural drinking water supply, pressure boosting, air-conditioning  systems, industrial plants, cooling water systems, fountains, sea water desalination works, mine dewatering etc.

Design

Submersible pumpset is a  compact unit made up of a submersible  pump & a submersible motor with shafts connected by a sleeve and operates beneath the surface of water.  This maintenance-free pumpset is suspended vertically from raising main when installed.

Submersible Pumps are single or multistage  submersible  pumps with  radial or mixed flow impellers.  The casings of the radial  flow impeller pumps are clamped together by flat steel hook bolts whereas that of mixed flow impeller pumps by studs.

Between the pump & the motor is the suction casing.  A non-return valve is fitted to the pump discharge.

Submersible motors are water filled, water lubricated squirrel cage type.  The axial thrust generated by the pump is absorbed by a thrust bearing fitted at the bottom of the motor.  The diaphragm below the thrust bearing compensates the overpressure which  arises as a result of the  thermal expansion of the water filled, when the temperature of the winding rises.

3 phase submersible motors are available upto 110 KW, 2 pole and voltage 380 to 420 V, 50 Hz.  Motors for other voltages & 60 Hz.  Can be supplied on request.

Bearings the Pump is provided with radial bearings.  The motor has radial as well as axial thrust bearings.  All the bearings are water lubricated and protected to a large degree against the ingress of sand of by suitable structural elements.

Shaft Seal  the motor is sealed by radial seal rings to avoid mixing of well water and the fill water.  Mechanical seals can be provided on request.

Discharge connection Threaded non-return valve is fitted at discharge end of the pumpset having sizes  form G3” to G8” (75 to 200 mm)

Operating Data

Capacity                                                Up to 900 m³ / hr.

Total head                             Up to 300 mtrs.

Motor rating                           Up to  110 kW

Speed                                    2900 rpm

Frequency                             50 Hz

Supply Voltage                     Up to 420 volts