QJ Deep Well Submersible Electric Pump with 5–1,500 m³/h Flow Range and 10–600 m

• Wide Performance Range: Covers flow rates from 5 to 1,500 m³/h and heads from 10 to 600 m, suitable for both small water-supply projects and large-capacity deep-well pumping systems.
• High-Head Water Delivery: Multistage impeller design gradually increases water pressure, allowing delivery from deep wells and transport over long distances or to elevated storage facilities.
• Integrated Submersible Design: Pump and motor operate below water level as an integrated unit, eliminating need for separate pump room or long transmission shaft.
• Space-Saving Vertical Installation: Slim vertical structure suitable for installation inside deep wells and boreholes, occupying minimal surface space.
• Stable Water Supply: Provides continuous and stable clean-water delivery for irrigation, municipal supply, industrial systems and other water-management projects.
• Low Operating Noise: Underwater operation reduces noise compared with surface-mounted pumping systems.
• Suitable for Automatic Control: Can be connected to control cabinet, water-level sensor, pressure sensor, storage tank or variable-frequency drive for automatic operation.
• Flexible Project Configuration: Pump capacity, head, motor specification, cable length, control method and discharge connection can be selected according to project requirements.

The QJ deep-well submersible pump uses a vertical multistage centrifugal hydraulic structure. When the motor starts, it drives the pump shaft and impellers to rotate at high speed. Water enters through the pump inlet and passes through the impellers and guide vanes.

Each hydraulic stage increases the pressure of the water. After passing through the required number of stages, the water is discharged through the pump outlet and delivered to the surface through a rising pipe. Because the motor and pump operate below the water level, no suction pipe or priming procedure is required under normal installation conditions.

• Deep-well and borehole water extraction
• Agricultural irrigation systems
• Farmland and greenhouse irrigation
• Sprinkler and drip-irrigation systems
• Municipal and rural water-supply systems
• Residential and commercial water supply
• Industrial clean-water circulation
• Factory process-water supply
• Clean-water pressure boosting
• Reservoir and storage-tank filling
• Livestock and farm water supply
• Landscape and garden irrigation
• Mining and construction-site clean-water supply
• Fire-water storage and supply systems
• Groundwater transfer projects

• Operates directly below the water level
• Does not normally require suction priming
• Can extract water from depths beyond the suction limit of a surface pump
• Vertical structure requires limited ground space
• Underwater operation helps reduce noise
• Multistage structure can generate high discharge pressure
• Can be integrated with automatic water-level or pressure-control systems

Correct pump selection is essential for achieving reliable performance and avoiding motor overload, insufficient flow or excessive energy consumption.

Please provide the following information when requesting a pump selection:

1. Required flow rate in m³/h
2. Required total head in metres
3. Well depth
4. Well casing or borehole diameter
5. Static water level
6. Dynamic water level during pumping
7. Distance between the well and discharge point
8. Vertical elevation difference
9. Pipe diameter, length and material
10. Water temperature
11. Water quality and sand content
12. Available power supply
13. Required cable length
14. Manual, automatic or variable-frequency control requirements

The required pump head is not equal to the well depth alone. A complete head calculation should normally include:

Total Head = Dynamic Water Level + Vertical Elevation + Required Outlet Pressure + Pipeline Friction Losses

For example, if water must be lifted from a deep well and then transported through a long pipeline to an elevated tank, both the vertical lifting height and the pipeline resistance must be included.

Accurate operating information helps ensure that the selected pump operates close to its recommended performance range.

For safe and reliable operation:

• Install the pump vertically unless otherwise confirmed by the manufacturer
• Make sure the well diameter is suitable for the pump's outside diameter
• Keep the pump inlet sufficiently below the dynamic water level
• Avoid positioning the pump directly in mud or sediment at the bottom of the well
• Use a suitable rising pipe, cable and suspension arrangement
• Check the motor's direction of rotation before normal operation
• Secure the power cable to the rising pipe without excessive tension
• Install appropriate electrical and motor-protection devices
• Make sure the pump remains submerged during operation
• Flush or clean newly drilled wells before installing the pump
• Commissioning should be carried out by qualified personnel

A control cabinet can be configured with:

• Manual start and stop
• Automatic water-level control
• Constant-pressure control
• Variable-frequency speed control
• Dry-running protection
• Motor overload protection
• Phase-loss protection
• Phase-sequence protection
• Overvoltage and undervoltage protection
• Motor overheating protection
• Leakage protection
• High- and low-water-level alarms
• Remote monitoring and control