125QJ Deep Well Submersible Pump China Factory and Suppliers

Leading China factory and suppliers of 125QJ deep well submersible pumps. We provide OEM processing and custom non-standard designs based on GB/T2816-2014 and GB/T2818-2014 standards. Contact us via WhatsApp 17855846335 for high-efficiency water solutions.

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Details

Detailed Parameters

Flow Range	5 - 500 m³/h	Maximum Lift	4 - 800 m
Power Range	3 - 315 KW	Power Supply	Three-phase AC 380V, 50Hz
Max Water Temp	≤ 20 °C	PH Value Range	6.5 - 8.5
Impurity Content	≤ 0.01% (mass ratio)	Chloride Ion	≤ 400 mg/L
Diving Depth	Max 70 m	Min Bottom Gap	≥ 3 m from well bottom

Key Advantages

Robust Sealing

Equipped with dual oil seals and a specialized sand ring structure to prevent well particulates from entering the motor.

Long-term Durability

Water-lubricated bearings and high-quality stator winding ensure extended service life and stable insulation.

Precision Engineering

Designed via computer CAD for an optimized hydraulic structure, delivering excellent technical performance.

Efficient Cooling

Water-filled wet motor structure provides natural cooling and lubrication for the internal bearings.

Compact Design

The vertical, slim profile allows for installation in narrow wellbores without sacrificing flow capacity.

Stable Operation

Integrated thrust bearings and precise couplings prevent shaft jumping during high-torque startup.

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Management Platforms

Application Scenarios

Perfect for deep well intake, high-rise water supply, and agricultural irrigation.

Installation Support

Comprehensive guidelines for vertical installation and cable waterproofing.

Safety Protection

Full support for overload, phase loss, and undervoltage protection devices.

Maintenance Cycle

Scheduled annual inspections to replace wearing parts like impellers and seals.

Quality Control

Strict insulation resistance testing (≥100MΩ) before every deployment.

Environmental Fit

Engineered to handle various water qualities within specified pH and chloride limits.

Investment Return Comparison

Comparison MetricInitial InstallationMaintenance CostEnergy EfficiencyService LifeOperational Stability

Standard Pumps	125QJ Series
Complex Setup	Simple Vertical Fit
Frequent Overhauls	Low-wear Components
Moderate	High-efficiency Motor
Standard	Extended (Water-Lubricated)
Average	High Stability (CAD Optimized)

Frequently Asked Questions

Q: What are the ideal water quality conditions for the 125QJ pump?

The pump is designed for clean water with a PH value between 6.5 and 8.5, temperature not exceeding 20°C, and solid impurities less than 0.01%.

Q: How should I protect the motor during the installation process?

Ensure the motor cavity is completely filled with clean, non-corrosive water to lubricate rubber bearings and prevent overheating upon startup.

Q: Can this pump be used for muddy or sandy water?

No, the 125QJ is a clean water pump. Pumping sediment or muddy water can cause premature wear and damage to the internal impellers.

Q: What is the minimum distance the pump should be from the well bottom?

To avoid sucking in mud and silt, the bottom of the pump should be positioned at least 3 meters above the well bottom.

Q: How do I handle pump storage during winter?

You must drain the water from the motor cavity to prevent ice damage caused by freezing temperatures in winter.

Q: What happens if the motor is started without water?

No-load testing without water is strictly prohibited as it can cause immediate damage to the bearings and motor winding.

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