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300QJ Series Submersible Pump
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300QJ Series Submersible Pump

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Uses and Characteristics:

"Boli" brand 300QJ series submersible pump for wells is designed according to national standards. It is widely used for farmland irrigation, water supply and drainage in industrial and mining enterprises, and water for human and livestock in plateau and mountain areas.

It is characterized by working through direct connection of motor and water pump into the water, and simple structure, convenient installation and maintenance, safe and reliable operation. The size of connection between the motor and the pump body is designed according to the national standard GB/T2816. 

Operating Conditions:

1. The power supply is 50HZ and 380V three-phase AC power supply

2. The water temperature is not higher than 20℃.

3. The solid content in the water (by mass) is not greater than 0.01%.

4. The PH value of the water ranges from 6.5 to 8.5.

5. The chloride ion content in the water is not greater than 400 mg/L.

Selection of Submersible Pumps:

The following items should be understood to reasonably select and use submersible pumps:

1. The power supply is 50HZ and 380V three-phase AC power supply

2. The water temperature is not higher than 20℃.

3. The solid content in the water (by mass) is not greater than 0.01%.

4. The PH value of the water ranges from 6.5 to 8.5.

5. The chloride ion content in the water is not greater than 400 mg/L.

When selecting submersible electric pump, the flow rate, lift and outer diameter of the unit shall be determined according to the water inflow, depth and diameter of the well. The inflow of water from the well shall meet the flow requirements of the electric pump to ensure that the electric pump is completely immersed in the water during operation.

Selection of Power Supply:

To ensure smooth start-up of the electric pump, the capacity of the transformer must be greater than or equal to twice the power (absolute value) of the motor, and the distance between the transformer and the wellhead position should be shortened as far as possible to reduce the voltage drop of the line.

 

Performance Chart: 

 

Structure Characteristics:

1. Water pump: It’s located at the upper end of the electric pump in the form of centrifugal type and rigidly connected to the coupling for the motor water lubricated bearings. A check valve case is arranged at the upper end of the water pump to prevent the working parts from being damaged due to backflow water in the lifting pipe when the electric pump is stopped. The valve is provided with a drain hole, which can slowly drain the water in the pipeline to prevent the pipeline from freezing and cracking in winter. (Note: A low-lift submersible pump does not have a check valve case)

2. Motor: It’s located at the lower end of the pump and is of closed water-filled wet structure. The stator winding is waterproof electromagnetic wire of polyethylene insulated and nylon sheathed multi-layer, and the guide bearing and thrust bearing are made of water lubricated material. The motor cavity is filled with clean water for cooling and lubrication. A pressure regulating membrane is installed at the bottom of the motor to adjust the expansion and contraction pressure difference of clean water in the body caused by temperature rise of the motor. A sand control mechanism is arranged on the upper end shaft of the motor to prevent silt from entering the machine body.

 

Technical Specifications Table:

 

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Address: A1, No.54 Shantou Road, Boshan District, Zibo City, Shandong Province
Sales Call:+86-533-4418291
Service Hotline:+86-533-4418787
Fax:+86-533-4408588
E-mail: gmpumps@163.com

 

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