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Difful's Brushless DC Permanent Magnet Motor Technology

Manufacturing process of high-quality DC permanent magnet brushless motors for solar water pumps.

Motor Coil

Wound by automatic wire inserting machine. All enameled wires are made of 180-degree high-temperature wires, and the stators are made of 600 cold-rolled silicon steel sheets.


Motor Coil

The coil after processing is subjected to turn-to-turn and withstand voltage tests. Qualified products are dipped in paint to increase the insulation and firmness of the coil.


Laser Marking on Motor Barrel

After being checked by the quality inspector, laser marking is carried out according to the customer's requirements.


Install the Oil Sac and Press the Circlip Cover

Press-fits the motor circlip cover with fully automatic press-fitting equipment.


Coil Pressing Process

Motor coil press-fitting with precise positioning.


Motor Size Measurement

The size of each press-fitted motor is measured. After passing the test, the motor can be put into production.


Motor Wiring

For the welding of the oil cylinder cable and the lead wire of the motor coil, double-walled tubes are used to protect the welding point with insulation.


Press-fitting of the Rotor

The rotor adopts 304 stainless steel shaft, which avoids the risk of broken shaft. The magnet is made of 40SH aluminum iron boron material, and the temperature resistance can reach 150 ℃.


Installing of the Mechanical Seal

The mechanical seal is made of silicon carbide impregnated with graphite, and the sealing performance of the motor is stronger.


Press-fitting of the Cylinder

After the oil cylinder is press-fitted, the sealed semi-finished motor is completed


Motor Test

The installed motor will undergo power-on test and air tightness test to ensure the tightness and stability of the motor.


Oiling the Motor

After passing the inspection, the motor is vacuum filled with lubricating oil, and a high-quality motor is completed.

Solar DC Submersible Pump Reviews

Innovative Technology-leading Solar Pump Manufacturer
South Africa

3 Inch DC Screw Solar Submersible Pump Application Feedback

DIFFUL solved the problem of domestic water supply for me. The water pump I used only needs a 200w solar panel, which can satisfy the water supply of our whole family.


4 Inch DC Plastic Impeller Submersible Pump Application Feedback

The quality of the water pump is very good, and the delivery is very timely. They track the transportation status of the goods actively and give us timely feedback. The water pump is now running very well.


3 Inch DC Plastic Impeller Submersible Pump Application Feedback

Used to replace the previous electric pump. The water pump works with three 330w solar panels for a 60m deep well. The water pump works very well, even on cloudy days.

Solar Submersible Pump Services

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Pre-sale Service

  • 24 hours online, response within 1 hour
  • Provide complete solutions
  • Support Distribution, OEM, ODM

Enforcing Contracts

  • Standardized service process
  • Professional product inspection before leaving the factory
  • Provide order tracking and logistics tracking

After-sale Service

  • 2 years warranty; provide solutions within 24 hours
  • Provide installation, maintenance and repair videos
  • Online training available

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