125QJB Deep Well Submersible Pump China Factory and Wholesale Suppliers

Leading China factory and suppliers of 125QJB deep well submersible pumps. We undertake OEM processing to design and manufacture non-standard submersible motors and pumps per GB/T2816-2014 and GB/T2818-2014 standards. Contact us via WhatsApp 17855846335.

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The 125QJB Deep Well Submersible Pump is a high-performance water extraction solution engineered for versatility and efficiency. Featuring an advanced frequency conversion winding design, this pump ensures stable operation across a wide range of 1HZ to 50HZ, significantly reducing energy consumption while extending the overall service life of the motor. Its robust construction makes it an ideal choice for demanding environments requiring consistent water output and long-term reliability.

Designed with precision using computer-aided CAD, the 125QJB series incorporates a water-loaded wet submersible three-phase asynchronous motor, utilizing clean water for both cooling and bearing lubrication. With its superior insulation performance and specialized sand-prevention structure, this pump is perfectly suited for diverse applications including agricultural irrigation, high-rise water supply, and industrial deep-well water intake, ensuring a steady flow even in challenging geological conditions.

Detailed Parameters

Power Supply	Three-phase AC 380V (±5%), 50HZ (±1%)	Max Diving Depth	Up to 70 meters
Water Temperature	Not higher than 20 °C	pH Value Range	6.5 - 8.5
Solid Impurities	Mass ratio ≤ 0.01%	Chloride Ion Content	≤ 400mg/L
Hydrogen Sulfide	≤ 1.5mg/L	Installation Mode	Strictly Vertical Use
Motor Cooling	Water-filled wet structure	Rated Flow Range	0.7 - 1.2 times rated flow

Key Advantages

Sand-Proof Design

Equipped with dual oil seals and a dedicated sand ring to prevent particles from entering the motor cavity.

Energy Efficiency

Frequency conversion winding allows for precise power adjustment, reducing electricity costs and wear.

Premium Insulation

High-quality submersible motor winding wire ensures excellent electrical insulation and safety.

CAD Precision

Computer-optimized structure provides superior technical performance and a simplified mechanical design.

Stable Operation

Includes a pressure regulating diaphragm to handle internal expansion caused by temperature rises.

Water Lubrication

Utilizes the surrounding water for lubrication, reducing friction and extending bearing life.

Product Gallery

Management Platforms

Deep Well Intake

Optimized for efficient water extraction from deep aquifers and boreholes.

Agricultural Use

Perfect for large-scale crop irrigation and garden watering systems.

Urban Supply

Reliable performance for high-rise building water supply and tower water.

Mountainous Areas

Engineered to handle the challenging elevation changes of mountain water supply.

River Intake

Capable of steady intake from rivers, ponds, and other surface water bodies.

Domestic Water

Provides a stable and clean water source for residential utility needs.

Investment Return Comparison

Performance Metric	Standard Submersible Pump	125QJB Series Pump
Energy Consumption	High (Fixed Speed)	Low (Frequency Conversion)
Service Lifespan	Standard	Extended (Optimized Cooling)
Maintenance Frequency	Frequent (Bearing Wear)	Reduced (Water Lubrication)
Operational Stability	Moderate	High (Stable 1-50HZ)
Total Cost of Ownership	Higher Long-term	Lower Long-term

Frequently Asked Questions

Q: What is the main benefit of frequency conversion in the 125QJB pump?

The frequency conversion winding allows the motor to operate stably between 1HZ and 50HZ, which optimizes power usage, reduces electricity costs, and extends the pump's mechanical life.

Q: Can this pump be used for pumping mud or sand?

No, the 125QJB is designed for clear water. Using it to pump mud or sand during new well drilling is strictly prohibited as it can cause premature damage to the pump components.

Q: What are the critical installation requirements for the motor?

The motor cavity must be completely filled with clean, non-corrosive water before use to ensure proper cooling and lubrication of the rubber bearings.

Q: How should the pump be positioned in the well?

The pump must be used strictly vertically. It should be placed in the middle of the well pipe, at least 3 meters above the bottom of the well to avoid suction of silt.

Q: What protection devices are required for the power supply?

The pump must be equipped with a distribution box providing short circuit overload protection, phase loss protection, undervoltage protection, and idling protection.

Q: How often should the 125QJB pump be maintained?

It is recommended to take the pump out for dismantling and maintenance after one year of operation, or every two years of diving time, to replace worn parts like impellers and sealing rings.

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