QJ Deep Well Submersible Pump
Product Information
Pump type:
Vertical multistage submersible pump
Flow rate:
5–600 m³/h
Head:
11–300 m
Rated speed:
About 2,850 rpm
Suitable well diameter:
150–400 mm
Water pH:
6.5–8.5
The QJ deep well pump is a vertical multistage submersible pump for lifting clean water from deep wells and boreholes. The pump and motor operate together below the water level. Therefore, the unit needs little surface space and does not require a long drive shaft.
Jingjiang Liutong Pump Industry Co., Ltd. supplies QJ pumps for agricultural, municipal, mining, construction, and industrial water systems. Different flow rates, heads, materials, motor powers, voltages, and outlet sizes are available for each project.
QJ Deep Well Pump Technical Parameters
| Parameter | Typical Series Range |
| Pump type | Vertical multistage submersible pump |
| Flow rate | 5–600 m³/h |
| Head | 11–300 m |
| Rated speed | About 2,850 rpm |
| Suitable well diameter | 150–400 mm |
| Standard power supply | 380 V, 50 Hz, three-phase |
| Water temperature | Up to 20°C for standard QJ models |
| Optional liquid temperature | Up to 90°C with selected QJR versions |
| Water pH | 6.5–8.5 |
| Maximum sand content | 0.01% by weight |
| Maximum chloride content | 400 mg/L |
| Pump material | Cast iron or stainless steel |
| Motor type | Water-filled submersible motor |
| Installation | Vertical, fully submerged |
These values describe the general product series. Actual flow, head, power, diameter, and installation depth depend on the selected model and site conditions.
Vertical Multistage Pump Design
Water enters through the inlet strainer between the pump section and the motor. The rotating impellers then raise the water pressure stage by stage. Finally, the water leaves through the top discharge connection and enters the rising pipe.
Adding more stages increases the available head. As a result, QJ pumps can lift water from deep underground and deliver it over long distances.
The complete unit normally includes:
- Multistage pump section
- Water-filled submersible motor
- Inlet strainer
- Non-return valve
- Pump shaft and coupling
- Power cable
- Rising pipe
- Control panel and protection device
Reference QJ Pump Models
| Reference Model | Rated Flow | Rated Head | Motor Power |
| 150QJ10-100/14 | 10 m³/h | 100 m | 5.5 kW |
| 150QJ20-60/10 | 20 m³/h | 60 m | 7.5 kW |
| 200QJ32-130/10 | 32 m³/h | 130 m | 18.5 kW |
| 200QJ40-104/8 | 40 m³/h | 104 m | 18.5 kW |
| 200QJ50-65/5 | 50 m³/h | 65 m | Duty-based |
For example, in the model 200QJ32-130/10, “200” refers to the minimum well diameter, “32” is the rated flow, “130” is the rated head, and “10” shows the number of pump stages.
Main Product Advantages
- High head from a compact multistage structure
- Pump and motor operate as one submerged unit
- No long transmission shaft is required
- Quiet operation below the water surface
- Small surface installation area
- Inlet strainer helps block larger foreign matter
- Water-filled motor supports cooling and lubrication
- Different stage numbers suit different well depths
- Cast iron and stainless steel options are available
- Suitable for continuous water-lifting duties
Typical Applications
The QJ submersible deep well pump can serve:
- Agricultural irrigation
- Sprinkler and drip irrigation
- Municipal water supply
- Rural drinking-water projects
- Industrial process-water systems
- Factory water supply and drainage
- Mine dewatering
- Construction-site drainage
- Reservoir and river water transfer
- Mountain-area water supply
- Fire-water storage systems
- Groundwater extraction projects
The standard model is intended for clean, non-corrosive water. It should not transfer sewage, heavy slurry, large solids, or flammable liquids.
Materials and Motor Options
Cast iron is widely used for standard freshwater applications. However, stainless steel options provide better corrosion resistance for selected groundwater conditions.
Available configurations may include:
- Cast-iron pump casing and impellers
- Stainless steel pump shaft
- SS304 or SS316 wetted parts
- Stainless steel motor housing
- Standard or corrosion-resistant fasteners
- 380 V, 415 V, 440 V, or 460 V motors
- 50 Hz or 60 Hz power supply
- High-voltage motors for large units
- Custom cable lengths
- Matching control panels
Material selection should consider the water temperature, pH, chloride content, sand level, and other dissolved substances.
Installation Requirements
The well must be straight and wide enough for the selected pump. In addition, its water yield must support continuous operation at the rated flow.
Install the pump inlet below the dynamic water level. However, keep the motor safely above the bottom of the well so that sediment cannot easily enter the inlet.
Before installation:
- Confirm the well diameter and depth.
- Measure the static and dynamic water levels.
- Check the required flow and total head.
- Fill the motor with clean water when required.
- Measure the motor insulation resistance.
- Check the cable and waterproof joints.
- Confirm the correct motor rotation.
- Install overload, phase-loss, and dry-run protection.
Never lift the pump by its power cable. Instead, use suitable lifting tools and support each rising-pipe section during installation.
Correct Pump Selection
Choosing a QJ pump only by well diameter can lead to low flow, motor overload, or poor efficiency. Therefore, selection should be based on the full system data.
Please provide:
- Required flow and head
- Well casing diameter
- Total well depth
- Static and dynamic water levels
- Rising-pipe size and length
- Water temperature and quality
- Sand and chloride content
- Motor voltage and frequency
- Daily operating hours
- Required cable length
- Installation location and altitude
Jingjiang Liutong Pump Industry Co., Ltd. can use this information to match the pump diameter, number of stages, motor power, cable, materials, and control system.
Manufacturer Supply and Testing
We support pump selection, motor configuration, material matching, assembly, and inspection. In addition, we can supply complete units with cables, control panels, rising pipes, valves, flanges, and spare parts.
Before shipment, the pump can be checked for assembly quality, insulation, sealing, rotation, and operating performance. Custom documentation and export packing are also available for overseas projects.
Frequently Asked Questions
Can a QJ pump work horizontally?
The standard QJ pump is designed for vertical installation. Horizontal installation requires a special configuration and technical approval.
Can it pump hot water?
Standard models normally handle cool water. For geothermal or hot-water service, select a QJR version with suitable materials and insulation.
Can it handle sandy water?
Only a small sand content is allowed. Excess sand can wear the impellers, guide vanes, bearings, and motor seals.
How is the correct head calculated?
Total head includes the vertical lift, pipeline friction, outlet pressure, and local losses from valves and fittings.
Does the pump need dry-run protection?
Yes. Dry-run protection helps prevent damage when the well level falls below the pump inlet.
Request a QJ Deep Well Pump Quotation
Send us your well data and required duty point. Our team will recommend a suitable QJ deep well pump, motor, material, cable, and control solution for your water-lifting project.
