Resin Filled Encapsulated Submersible Motors R-Series


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"
Power Range (kW) 0.37 kW - 1.1 kW - 2 wire - 1 Ph,
0.37 kW - 2.2 kW - 3 wire - 1 Ph (with in-built TOP*)
0.37 kW - 7.5 kW - 3 wire - 3 Ph
Speed 2900 rpm
Versions AC, 1 Ph, 230V & AC, 3 Ph, 380/415V
Degree of Protection IP 58
Direction of Rotation CCW - 1 Ph     CW, CCW - 3 Ph
Outer Diameter 96 mm (max)
Type of duty S1 (Continuous)
Maximum Down thrust load 0.37 kW - 0.55 kW - 15000 N
0.75 kW - 1.5 kW - 3000 N
2.2 kW - 7.5 kW - 6500 N
Min. Cooling Flow Required 0.15 m / sec
Max. Liquid Temperature 33°C
Starts per hour 20 Times
Shaft Splined as per NEMA Standard
Mounting Standards NEMA Standards
Method of Starting 1 Ph - 2 wire - Permanent Split Capacitor (PSC)
1 Ph - 3 wire - Capacitor Start and Capacitor Run (CSCR)
3 Ph - 3 wire - Direct On Line (DOL)
Cable Lead 2 & 3 wire removable type
* Thermal Overload Protector
  • 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
Part Name  4"
Housing Shell S.S. 304
Stator Shell S.S.304
Shaft Extension S.S.304
Bearing Bush Graphite Carbon
Thrust Bearing SS 420 / Graphite  Carbon
Capacitor Chamber Thermoplastic (2wire)
Used as prime mover to couple with deepwell submersible pumps for following applications
  • home Residential
  • irrigation Irrigation
  • fountains Fountains
  • industrial-water-supply Industrial water supply
  • pressure-boosting-units Pressure Boosting Units
  • Gardens Gardens
  • >Sprinkler Systems Sprinkler Systems
  • Mining Mining
  • Oil-Gas Oil & Gas
  • Dewatering & Food Process Industry De-watering