Motors Resin Filled Encapsulated



C.R.I.’s R – Series motors are hermetically sealed encapsulated and water lubricated type with Removable cable lead out. The stator winding are of enamelled copper wire and the wounded stator in mounted in a stainless steel shell and completely protected by a stainless steel cylinder and stator room is pre-filled with Resin. Dynamically balanced rotor of these ‘R’ series motors maintain uniform clearance there bygiving better efficiency and increase the life cycle of the water lubricated bush bearings. Specially designed high performance thrust bearings are used that can withstand high axial thrust loads and up thrust loads with wear and tear. Pressure equalizing rubber diaphragm is provided to guard against pressure and volume variations due to thermal expansion of water inside the motor. Motor sealing are made by means of ‘O’ rings, shaft seals and sand guard to prevent ingress of well water, sand and fibre particles in to the motor. Mounting dimension of Motors are accordance with NEMA standard.


Nominal Dia 4″ (100 mm)
Maximum Outer Dia. 3.74 inches
Power Range 0.5 HP – 1.5 HP – Single phase 2 wire
0.5 HP – 5 HP – Single phase 3 wire
0.5 HP – 10 HP – Three phase 3 wire
Speed 3450 rpm
Versions A.C. Single Phase : 110 V, 220 V / 230 V – 60 Hz (PSC / CSCR)
A.C. Three Phase : 220 V / 230 V / 380 V / 440 V / 460 V (D.O.L) – 60 Hz
Maximum Down
Thrust Load
0.5 HP – 0.75 HP – 300 lbs,
1.0 HP – 2 HP – 650 lbs
3 HP – 10 HP – 1500 lbs
Type of Duty S1 (continuous)
Degree of Protection IP 68
Class of Insulation B
Maximum Liquid Temperature 91.4° F (33°C)
Minimum Cooling Flow 0.25 ft / sec
Starts per hour 20 Times
Shaft Splined
Mounting Standard NEMA Standard


  • Can be easily dismantled and repaired
  • Higher power factor resulting in lesser power consumption
  • High operating efficiency
  • Extremely hardwearing water lubricated bearings
  • Specially designed thrust bearing to withstand high axial thrust loads
  • Larger shaft diameter for better power transmission
  • Corrosive resistance stainless steel body
  • Stator filled with resin for better heat dissipation

Materials of Construction

Part Name Material
Housing Shell SS 304
Stator Shell SS 304
Shaft Extension SS 304
Bearing Bush Graphite Carbon
Thrust Bearing/Pad SS 420 / Graphite Carbon
Capacitor Chamber Thermoplastic (2wire)
‘O’ Ring NBR
Diaphragm NBR


Used as prime mover to couple with deepwell submersible pumps for following applications

  • Residential
  • Irrigation
  • Fountains
  • Industrial water supply
  • Pressure boosting units
  • Gardens
  • Sprinkler Systems
  • Mining
  • Oil & Gas
  • De-watering


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