The difference between oil-immersed submersible pumps and water-immersed submersible pumps.

The difference between oil-immersed submersible pumps and water-immersed submersible pumps.

• Oil grade

• Cable

• Different Types of Electric Coolant

• Different impacts on the environment

• Different service life

• Applications are different 

oil grade:The oil used in oil-immersed submersible pumps is generally No. 5 or No. 10 oil. Engine oils of different grades cannot be mixed.

Cable: For small-power oil-immersed submersible pumps, use: medium-sized general-purpose rubber-sheathed flexible cable 

 for larger-power oil-immersed submersible pumps, use: heavy-duty general-purpose rubber-sheathed flexible cable.

Oil-immersed submersible pumps are lubricated with mechanical oil, and their lubrication conditions are better than those of submersible electric pumps, and their service life is often longer.

Different Types of Electric Coolant

The oil-immersed type uses mechanical oil, and the water-immersed type uses water.

Different impacts on the environment

Water immersion type leakage will not pollute the environment, oil immersion type will pollute the environment

The application occasions are different.

The water immersion type can be used for drinking water, and the oil immersion type is mainly used for agricultural drainage and irrigation, water tower, fountain water supply, flood control and drainage, and municipal construction drainage.

Different service life

Oil-immersed submersible pump is a portable shallow water drainage and irrigation equipment. Its characteristic is that the motor is filled with mechanical oil, which changes the working conditions of the mechanical seal and makes it more difficult for external water to enter the motor. The oil quickly conducts the heat inside the motor, and the cooling effect is good, which greatly reduces the temperature rise of the motor, thereby increasing the overload capacity of the submersible pump.

In addition, the bearings of oil-immersed submersible pumps work in oil to ensure lubrication and cooling, so the bearing life is longer than other types of submersible pumps.

Oil-immersed water pumps are generally used in submersible pumps (the whole pump is immersed in water), and the motor is sealed and filled with oil to ensure that there is no water in the motor and ensure the insulation performance of the motor. Water pumps generally refer to power equipment that transports water, including submersible pumps.

The motor cooling method of the water-immersed submersible pump is filled with water, while the motor cooling method of the oil-immersed submersible pump is filled with mechanical oil. Both have strong cooling capabilities and strong waterproof capabilities. 

Applications are different

 The water immersion type can be used for drinking water, and the oil immersion type is mainly used for agricultural irrigation and drainage, water tower water delivery, fountains, flood control and drainage, municipal construction drainage, etc.

service life. The oil-immersed submersible pump has mechanical oil lubrication inside, and the lubrication conditions are better than that of the water-immersed pump, and its service life is often longer.