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250 mm (10") Borewell Submersible Pumps - CM Series

C.R.I. 250 mm (10") Borewell Submersible pumpset is made with different materials of construction together with extremely tough hardwearing bushes which make this pumpset highly durable. This pumpset is supplied with stainless steel & LTB-2 impellers to give better performance and longer life. The optimal design of impellers and diffusers offers best possible hydraulic efficiency. This pumpset is powered by a water filled, rewindable submersible motor, which is suitable for continuous duty. The stator is wound with special waterproof synthetic film insulated copper winding wires and made up of low watt loss silicon steel laminations assembled under pressure and rigidly locked in stainless steel stator shell. Specially designed thrust bearings (SS AISI – 420 with Graphite Carbon) are used to withstand axial and down thrust loads with minimum wear and tear. Dynamically balanced rotor gives vibration free and noise free operation, thereby increases efficiency and life cycle of the motor.

Features Specifications (MOC) Pump (MOC) Motor
  • Pumps are designed to give more discharge
  • Extremely hard wearing water – lubricated bearings
  • Designed for extensive voltage fluctuations
  • Silver brazed rotor
  • 6” motor and 8” pump combination on request
SPECIFICATIONS
Power range 7.5kW - 93kW (10 HP - 125 HP)
Speed 2880 RPM
Version Three Phase, 380- 415 V,  50 Hz, A.C. Supply
Maximum total head 164 m
Maximum flow rate   65 lps
Nominal outlet size in inches 150
Degree of Protection IP 58
Direction of rotation Anticlockwise from driving end.
Type of Duty S1 (Continuous)
Thrust Load 10000 lbs / 45500 N
Minimum cooling flow along the motor 0.16 m/sec
Method of starting S/D 7.5kW – 93kW
Maximum Outer Diameter in mm 247
Maximum starts per hour 4 times

MATERIAL OF CONSTRUCTION OF PUMP
Part Name Material
Check Valve housing Cost iron (FG 200)
Check Valve Seat Nitrile butyl rubber / S.G Iron
Diffuser Chamber Cast Iron (FG 250)
Impeller SS AISI - 410 (casted) / LTB - 2
Suction Inter Connector Cost Iron (FG 200)
Inlet Screen SS AISI - 202
Pump Shaft SS AISI - 410 / SS AIS - 431
Cable Guard SS AISI - 202
Coupling SS AISI - 410 / SS AISI - 431

MATERIAL OF CONSTRUCITON OF MOTOR
Part Name Material
Diaphragm High Nitrile butyl rubber
Journal bearings LTB - 4 /Graphite Carbon
Thrust Assembly SS AISI 420 and Graphite Carbon
Lower / Upper housing Cast iron (FG 200) / (with outer shell SS AISI 304 - on request)
Stator shell SS AISI 304
Shaft EN 9 With SS -410/431 sleeve at bush guide