4” Water Lubricated Motors (50/60 Hz)

Unnati UW4 Series submersible motors are perfect for water-wells of 4-inches or larger diameter as it’s fitted with high-torque CSCR system and thus easier to repair and rewind. Pre-filled with a blend of clean water and anti-corrosion fluid and fitted with polypropylene copper wires for stator winding. The pressure-equalizing rubber diaphragm protects the motor against fluctuations of pressure or volume. Fitted with dynamically balanced rotor that ensures steady clearance, durability of bush bearings (water-lubricated) and highest efficiency. Premium-quality thrust bearings can withstand high axial thrust load. While triple sealing of ‘O’ rings, shaft seals and sand guards prevent the ingress of well-water or pollutants and leakage of lubricant. Thus, 4 inch Water Lubricated Motors are useful for mining industries, pressure-boosting units, industrial water supply, irrigation, fountains, gardening/horticulture, drip/sprinkler systems, and oil/gas industries.

Submersible Motors
Description Tech Spec with Moc Downloads


Unnati Water Lubricated Submersible Motor are robust, rewindable and pre-filled with clean water mixed with anti-corrosion fluid.

Water Lubricated radial and thrust Bearing (Carbon V/S Chrome Steel)

Shaft Extension Made of Stainless Steel AISI 420

High efficiency electrical design for lower operating cost.

Pressure Compensation diaphragm

All single Phase Motors require Control Box

Single Phase Motors are Capacitor start Capacitor run (CSCR)

Variety and Range

Flow Range : 1.56 to 18.0 M3/h

Head Range : 20 to 300 Meter

Ratings : 0.37 Kw to 3.7 Kw (Single Phase) & 0.75 kw to 7.5 kw (Three Phase)

Rating Speed : 2850 RPM

Pressure Compensation diaphragm

Technical Specification / Material of Construction

Upper and Lower Housing & motor base : Only Stainless Steel

Stator Shell : Stainless steel

Motor Shaft : S.S 420

Winding Wire : Poly Propylene

Degree of Protection : IP 68

Max Water Temperature : 50’C

Nos. of Start per Hour : Max 20 at regular intervals

Voltage variation : +6% / -10% at rated voltage

Max depth immersion : 400 meter

Motor Cable Length : 3.0mtr(3 core/ 4 core)

Maximum Outer Dia : 98 mm

4″ Water Lubricated Motors 50 Hz