The 300QJB Deep Well Submersible Pump is a high-performance engineering solution designed for demanding water extraction tasks. Featuring an advanced variable frequency winding design, this pump ensures seamless motor operation between 1Hz and 50Hz, significantly enhancing energy efficiency while extending the overall service life of the equipment. Whether deployed in residential setups or heavy-duty industrial environments, it provides the reliability and stability essential for continuous production processes.
Engineered for precision and durability, the 300QJB series utilizes a water-filled wet submersible motor structure, which optimizes cooling and lubrication of the bearings. With a robust CAD-optimized design and high-insulation winding wires, this pump is capable of operating at depths up to 70 meters, making it an indispensable tool for deep-well water intake, agricultural irrigation, and high-rise water supply systems across various geographical terrains.
Detailed Parameters
| Power Supply | Three-phase AC 380V (±5%), 50HZ (±1%) | Max Diving Depth | Up to 70 Meters |
|---|---|---|---|
| Water Temperature | ≤ 20 °C | PH Value Range | 6.5 - 8.5 |
| Solid Impurities | ≤ 0.01% (Mass Ratio) | Chloride Ion Content | ≤ 400mg/L |
| Hydrogen Sulfide | ≤ 1.5mg/L | Installation Position | Strictly Vertical Use |
| Cooling Method | Water-filled Wet Structure | Insulation Resistance | ≥ 100MΩ (after installation) |
Key Advantages
Variable Frequency Control
Innovative winding design allows smooth operation from 1Hz to 50Hz, reducing energy consumption and wear.
Extended Lifespan
High-quality submersible insulation and water-lubricated bearings ensure long-term operational stability.
Sand-Proof Design
Dual sand seals and a specialized sand ring prevent particles from entering the motor cavity.
CAD Optimized Structure
Precision engineered via computer CAD for maximum hydraulic efficiency and simplified maintenance.
Thermal Stability
Integrated pressure regulating diaphragm adjusts for water expansion caused by motor temperature rises.
Versatile Application
Perfect for agricultural irrigation, tower water, mountain supply, and industrial river water intake.
Product Gallery
Management Platforms
Quality Control
Strict adherence to manufacturing standards for each impeller and shaft sleeve component.
Technical Support
Professional guidance on installation depth and motor grounding for maximum safety.
Safety Monitoring
Comprehensive motor protection including overload, dephase, and undervoltage tripping.
Maintenance Alerts
Annual inspection protocols to replace wearing parts like sealing rings and rubber sleeves.
Inventory Logic
Rapid deployment of standard models with customized voltage options available.
Efficiency Audits
Regular verification of motor efficiency (up to 88%) and power factor (cosφ 0.87).
Investment Return Comparison
| Feature | Standard Submersible Pump | 300QJB VFD Series |
|---|---|---|
| Energy Consumption | High (Constant Speed) | Low (Variable Frequency) |
| Motor Lifespan | Standard | Extended (Optimized Cooling) |
| Operational Stability | Prone to Wear | High (Sand-Proof Design) |
| Installation Flexibility | Limited Depth Range | Deep Well Capable (Up to 70m) |
| Maintenance Cost | Frequent Part Replacement | Reduced Wear via VFD Control |
Frequently Asked Questions
It is ideally suited for deep well water intake, high-rise building water supply, agricultural and garden irrigation, mountain water supply, and industrial river water intake.
The VFD design allows the motor to operate smoothly between 1Hz and 50Hz, which saves energy, reduces mechanical stress on the pump, and prolongs the overall service life.
The pump is for clean water: temperature ≤ 20°C, PH 6.5-8.5, solid impurities ≤ 0.01%, chloride ions ≤ 400mg/L, and hydrogen sulfide ≤ 1.5mg/L.
While it features dual sand seals and a sand ring to protect the motor, it is strictly prohibited to use it for pumping dirty water with heavy sediment or for digging new wells.
The pump must be installed vertically, completely submerged in water, and positioned at least 3 meters above the well bottom to avoid mud intake.
It is recommended to dismantle and repair the unit every operation year, or every two years of submersible time, replacing wearing parts like impellers and sealing rings.
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