| Parameter | Specification |
| Product Name | ZQB/HQB Submersible Axial and Mixed-Flow Pump |
| Pump Type | Submersible axial-flow or mixed-flow pump |
| Flow Rate | 550–80,000 m³/h |
| Head Range | 2–16 m |
| Discharge Diameter | DN350–DN2400 |
| Installation Type | Fully submersible installation |
| Unit Structure | Integrated pump and motor |
| Hydraulic Characteristic | Ultra-high flow with low to medium head |
| Control Options | Local, remote and automatic control |
| Main Applications | Irrigation, drainage, municipal construction, dockyards, water supply and power stations |
Specific motor power, operating speed, installation dimensions and hydraulic configuration depend on the selected model and actual operating conditions.
The ZQB/HQB series includes axial-flow and mixed-flow hydraulic configurations for different flow and head requirements.
The ZQB axial-flow pump moves water mainly in a direction parallel to the pump shaft.
It is especially suitable for applications requiring extremely large flow rates at relatively low heads, including:
The HQB mixed-flow pump combines axial and radial hydraulic characteristics.
It is suitable for applications requiring a balance between large flow capacity and a higher head than a typical axial-flow pump can provide.
The final pump type should be selected according to the required flow rate, total head, water level, installation structure and operating conditions.
The ZQB/HQB series provides flow capacities from 550 to 80,000 m³/h.
This exceptionally wide range makes it suitable for medium-sized pumping stations as well as major water-conservancy, municipal and industrial water-transfer projects.
The pump provides a head range of 2 to 16 meters.
It is designed for applications where large volumes of water must be moved efficiently without requiring extremely high discharge pressure.
The water pump and motor are designed as one integrated submersible unit.
There is no need to perform shaft-centering or long-shaft alignment between a separate pump and motor at the installation site.
This design reduces on-site assembly work and makes installation faster and more convenient.
Because the pump operates underwater, the civil and structural design of the pumping station can be simplified.
Compared with many conventional vertical pump installations, the ZQB/HQB system can reduce the need for:
The simplified structure can shorten the construction period and reduce the total cost of the pumping project.
The compact submerged arrangement occupies less above-ground space.
It is particularly useful for municipal areas, industrial sites and water projects where available construction land is limited.
The integrated pump-and-motor structure reduces the number of installation procedures required at the site.
Once the supporting structure, discharge passage and electrical system are ready, the pump unit can be installed without performing complicated shaft-alignment work.
Because the pump and motor operate underwater, much of the operating noise is absorbed by the surrounding water and civil structure.
This helps create a quieter pump-station environment and reduces noise disturbance in urban, recreational and public areas.
The motor operates underwater and transfers heat to the surrounding water.
This arrangement reduces the amount of heat released into the above-ground pump-station space, helping improve working conditions for operating and maintenance personnel.
The ZQB/HQB pump can be used in fully underground pumping-station designs.
This allows the ground surface to remain available for landscaping, roads, public facilities or other urban uses.
A fully underground station can help preserve the surrounding environmental appearance and reduce the visual impact of large water infrastructure.
The operator does not need to supply lubricating water to conventional rubber guide bearings before starting the pump.
This simplifies startup procedures and reduces the requirements for auxiliary lubrication-water systems.
The pump system can be configured for local operation, remote monitoring and automatic control.
Depending on the project requirements, the system may support:
This makes the ZQB/HQB series suitable for modern unattended or minimally staffed pumping stations.
The submerged motor is positioned underwater with the pump unit.
This arrangement helps solve the problem of protecting conventional above-ground motors from flooding in riverside, lakeside and flood-prone areas where water levels may rise and fall significantly.
The pump can therefore be used in pumping stations located near rivers, lakes, reservoirs and other areas exposed to seasonal water-level changes.
The ZQB/HQB pump is suitable for large agricultural drainage and irrigation projects.
It can transfer large volumes of water between rivers, canals, reservoirs and farmland over relatively low lifting heights.
Typical applications include:
The pump can be used for water intake, drainage and water-level control in industrial and mining dockyards.
Its large flow capacity makes it suitable for quickly filling, emptying or circulating water in large dock and port facilities.
The ZQB/HQB series can be installed in municipal drainage stations, stormwater pumping stations, urban flood-control systems and large-scale water-transfer projects.
Its underground installation capability is especially suitable for city centers and public areas where land use and visual appearance are important.
The pump can be used for raw-water intake, reservoir transfer, canal delivery and other large-volume water-supply projects.
It is suitable for systems requiring continuous water transportation at low or medium heads.
The pump can be applied in thermal, hydroelectric and other power-generation facilities.
Typical uses include:
The ZQB/HQB pump can provide large-volume water circulation for amusement parks, artificial lakes, water attractions and recreational facilities.
Its low-noise submerged operation is advantageous in public and entertainment environments.
The pump can be installed in permanent or temporary flood-control stations for discharging stormwater and accumulated water.
Its extremely high flow capacity enables rapid water removal from urban districts, agricultural areas and flood-prone locations.
The pump is well suited to riverside, lakeside and reservoir pumping stations where water levels fluctuate considerably.
Its submerged motor arrangement helps reduce the risk of motor flooding during high-water periods.
The ZQB/HQB Submersible Axial and Mixed-Flow Pump is mainly designed for transporting:
The pumped liquid should generally be free from:
Protective screens and debris-control equipment should be installed where weeds, branches, plastic or other large objects may enter the pump intake.
A conventional large vertical pumping station often requires a separate motor room, long drive shaft, multiple guide bearings and precise shaft alignment.
The ZQB/HQB submersible design integrates the pump and motor into one underwater unit.
This provides several important engineering advantages:
These advantages can significantly reduce the overall complexity of large pumping-station projects.
The civil works for a large pump station may represent a major portion of the project cost.
By installing the complete pumping unit underwater, the ZQB/HQB system can reduce the need for extensive above-ground structures.
Potentially simplified construction elements include:
The final civil design should be developed according to the pump size, lifting arrangement, discharge passage, water level and local construction standards.
For urban or environmentally sensitive projects, the pumping station can be designed as a fully underground facility.
Only access covers, ventilation equipment, electrical cabinets or other necessary components may remain visible at ground level.
This design can provide the following benefits:
Underground station design should include appropriate access, ventilation, lifting, drainage, electrical and safety systems.
Traditional pumping stations near rivers and lakes may face the risk of above-ground motors being flooded when the water level rises unexpectedly.
The ZQB/HQB pump places the motor underwater as part of the integrated pumping unit.
This configuration is particularly suitable for:
The electrical cables, junction systems and control equipment should still be installed above the specified flood-protection level or protected according to the project design.
The ZQB/HQB system can be integrated with modern monitoring and control equipment.
A typical automatic pump station may include:
Automatic operation can reduce the need for continuous on-site staffing and improve the response to changing water levels.
The pump should be installed according to the approved pump-station and hydraulic-passage design.
The inlet flow passage should provide stable and uniform water flow to the pump.
Sharp turns, vortices, excessive turbulence and uneven velocity distribution near the pump intake should be avoided.
The pump unit should be lifted only from the designated lifting points using equipment rated for the total pump weight.
The power cable must not be used for lifting or supporting the pump.
The installation structure should provide secure positioning while allowing the unit to be removed for inspection and maintenance.
The discharge passage and supporting components should be designed to withstand hydraulic forces, vibration and operating loads.
Protective screens should be installed where large debris may enter the intake.
For large pumping stations, hydraulic-model testing or computational analysis may be recommended to optimize the intake structure.
The submersible motor should be connected to a properly designed control and protection system.
Recommended protective functions may include:
The final protection configuration should be selected according to the motor size, pump-station design and project requirements.
The integrated submersible structure simplifies daily operation, but regular inspection remains important for reliable long-term service.
Recommended checks include:
The pump should be removed and inspected at intervals determined by the operating hours, water quality and project maintenance plan.
The ZQB/HQB Submersible Axial and Mixed-Flow Pump provides an efficient solution for extremely large water-transfer projects requiring flow rates of up to 80,000 m³/h.
Its integrated underwater pump-and-motor structure simplifies pump-station construction, reduces installation space and eliminates on-site shaft-centering procedures.
The submerged arrangement provides low operating noise, reduces heat inside the pump station and supports fully underground station construction.
Remote and automatic control can be integrated for convenient operation, while the underwater motor arrangement helps address flood-protection challenges in riverside and lakeside regions with large water-level fluctuations.
These advantages make the ZQB/HQB series suitable for farmland drainage and irrigation, municipal flood control, industrial dockyards, water-supply engineering, power stations and recreational water projects.
Please send us your required flow rate, head, upstream and downstream water levels, water quality, discharge diameter, pump-station structure, power supply and control requirements.
Our technical team will recommend a suitable ZQB or HQB pump configuration and provide detailed performance data, motor specifications, installation dimensions, control options and quotation.
ZQB/HQB Submersible Axial and Mixed-Flow Pump — An efficient, space-saving and highly automated solution for ultra-large-volume water transfer.
