Axial flow
The listed envelope is oriented toward higher flows and lower heads.
ZQB / HQB Pump Series
ZQB / HQB Submersible Axial-Flow and Mixed-Flow Pumps
Low-head, high-flow pump series for drainage, flood control, irrigation and industrial water transfer.
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Choose the Hydraulic Family From Flow and Head
The ZQB submersible axial flow pump is listed for very high flow at low head. The HQB mixed-flow range is listed for high flow at a higher head envelope. Both series combine the pump and submersible motor in a single unit for vertical or borehole installation in clean or slightly polluted water.
Series range, not one model: the figures below are series envelopes. No single configuration covers all listed maximums. Final selection requires the exact duty point, a model-specific Q-H curve, installation drawing and approved supply data.
500-15,000 m³/hZQB published flow range
2-12 mZQB published head range
400-10,000 m³/hHQB published flow range
3-18 mHQB published head range
ZQB and HQB Technical Range
Use this comparison for preliminary family screening, then confirm the selected model against the required operating points.
Mixed flow
The listed envelope extends to a higher head range while retaining high-flow capacity.
| Series | Flow | Head | Power | Liquid | Installation |
|---|---|---|---|---|---|
| ZQB | 500-15,000 m³/h* | 2-12 m* | 7.5-400 kW* | Clean or slightly polluted water, 40°C or below* | Vertical / borehole* |
| HQB | 400-10,000 m³/h* | 3-18 m* | 11-450 kW* | Clean or slightly polluted water, 40°C or below* | Vertical / borehole* |
*Published series limits are not a promise that every flow, head, power and installation combination is available. Confirm motor rating, hydraulic curve, materials, cable, dimensions and operating limits for the selected model.
ZQB / HQB Product Reference Views
The supplied images show several pump sizes and external configurations. Final construction and lifting details follow the approved model drawing.
Design Features to Confirm for the Selected Pump
Integrated pump and motor
The integrated pump-motor arrangement can simplify the station layout and allow direct installation in steel or concrete wellbores. The source mentions civil-cost reduction up to 40%, but no comparison basis or project calculation was supplied. Treat that figure as unverified and calculate the actual civil scope.
Submerged cooling and noise control
The supplied description lists a water-cooled design and low-noise motor design. No acoustic test value is provided, so confirm the motor cooling arrangement and any project noise limit for the selected configuration.
Motor protection and sealing
An IP68-rated motor, silicon carbide mechanical seals and built-in temperature and humidity sensors are listed. Confirm seal arrangement, sensor type, alarm logic and component coverage by model.
High-flow hydraulics
The source describes an optimized impeller, hydraulic performance and anti-cavitation capability. Request the model-specific curve, efficiency data and cavitation or submergence requirements before using those statements for selection.
Monitoring and automatic control
Remote monitoring and automatic control can be configured for a project. Confirm the control panel, signals, level instruments, communication protocol and protection functions in the supply scope.
Structure Reference Drawings
These two supplied sectional drawings show representative internal arrangements. Source-language labels remain part of the image, so use the approved English drawing for final part identification.
Open Intake and Well Shaft Installation Options
Small sizes can use an open water intake. Larger units, generally with an impeller diameter above 1 m in the supplied guidance, are shown with a closed inlet flow channel. Verify the threshold and civil interfaces for the selected model.
Suspended installation
The supplied description lists a complete well shaft with the pump for this arrangement. Confirm lifting, pipe loads, access and the exact supply boundary.
Steel well shaft
The source also lists a complete shaft for the steel well arrangement. Confirm flange details, civil support, corrosion protection and access.
Precast concrete well shaft
The listed supply includes an installation base with an anti-rotation device and a manhole cover. Confirm anchor loads, tolerances, sealing and the final civil drawing.
Closed inlet flow channel
Use the supplied closed-channel concept only after hydraulic and civil review. Intake geometry, approach flow, submergence and anti-vortex provisions require project-specific confirmation.
Seating and sealing: the pump is lowered until the inclined surface of the guide-vane body seats on its support. An O-ring provides the stated seal. Confirm the mating dimensions, tolerances, anti-rotation arrangement and retrieval method on the approved installation drawing.
Applications for Low-Head, High-Flow Water Transfer
Series suitability depends on the actual duty point, water condition, intake design, operating levels, materials, power supply and controls.
- Municipal drainage
- Large-volume drainage and stormwater pumping stations.
- Flood control
- Low-head transfer where operating levels and intake conditions are defined.
- Irrigation
- Canal, district and agricultural transfer duties within the selected model’s operating curve.
- Industrial water supply
- Clean or slightly polluted water transfer after liquid and material review.
Clean or slightly polluted water does not define an allowable solids size. Provide sediment, debris, fiber and water-chemistry information before selection. For a different axial-flow arrangement, compare the QS series medium-suction submersible axial-flow pump, or browse the industrial pump range.
EBAPs Vila Velha Stormwater Pumping Project Record
The supplied case record describes stormwater infrastructure in Espírito Santo State, Brazil. The figures below retain the source scope without assigning unverified equipment to the entire station.
Recorded project context
The project record covers a rainwater drainage station and associated city flood-control infrastructure. It lists about 12 km of closed drainage pipe galleries and 7 km of anti-seepage channels.
The project was recorded as ongoing in the supplied material. Current completion status and final as-built scope require confirmation.
- Location
- Espírito Santo State, Brazil
- Project type
- Estação de Bombeamento de Águas Pluviais, or stormwater pumping station
- Pump scope in supplied record
- Three 900QZB-315KW units with a stated diameter of φ1400 mm
- Matching equipment
- The record lists 11 equipment sets, including rotary screen cleaners, electric gates and flap gates
- Station capacity in supplied record
- About 72 million L/h across eight pumps, expandable to about 81 million L/h
The supplied record lists three 900QZB-315KW units and separately states the station capacity across eight pumps. It does not establish that all eight pumps were in the same supply scope. The stated φ1400 mm dimension is retained without relabeling it as impeller diameter.
Certification and Compliance Review
The existing page displays the following certification and approval marks. They are retained here for continuity.
Logo display does not independently verify that a specific ZQB or HQB model carries every shown approval. Request the exact certificate, issuing body, scope, model coverage, standard, validity and destination-market documents required for the project.
Information Needed for Pump Selection
Send enough operating and civil data to select the hydraulic family, motor, installation and controls.
Hydraulic duty
- Normal, minimum and maximum flow
- Total dynamic head at each operating point
- Minimum and maximum water levels
- Intake losses and discharge-system details
Water and installation
- Water source, sediment, solids, debris and fibers
- Temperature and water chemistry
- Suspended, steel shaft or concrete shaft arrangement
- Civil dimensions, access and lifting limits
Electrical and project scope
- Voltage, phase and frequency
- Control, monitoring and communication requirements
- Materials, standards and inspection documents
- Quantity, destination and required delivery scope
A useful enquiry includes every operating point, not only the highest flow. State whether pumps run singly, in parallel or under variable-level control.
Documents to Confirm Before Order
Treat performance and construction as confirmed only when they appear in the approved project documents.
- Model-specific datasheet and Q-H curve with duty points marked
- General arrangement, dimensions, weights and lifting details
- Installation and civil-interface drawing
- Motor, cable, sensor and protection data
- Materials, coatings, mechanical seals and elastomers
- Inspection, test and compliance documents
- Control panel, automation and communication scope
- Installation, operation and maintenance instructions
For the civil-cost statement, request a defined comparison that identifies the baseline station design, included work, quantities, location and calculation method.
Submersible Axial Flow Pump and Mixed Flow Pump FAQs
These answers support initial screening. Final supply depends on the selected model and project documents.
What is the difference between a ZQB axial flow pump and an HQB mixed flow pump?
The published ZQB envelope is oriented toward higher flows and lower heads. HQB retains high flow but extends to a higher listed head. Select from the required duty point and the model-specific curve.
Can one pump cover the full published range?
No. The figures are overall series envelopes. A selected model covers only a limited operating range and requires its own motor, dimensions, installation and operating limits.
Which installation forms are listed?
The supplied material shows suspended, steel well shaft and precast concrete well shaft arrangements, plus a closed inlet flow channel for larger units. Final civil and hydraulic interfaces require an approved drawing.
How is the pump seated and sealed?
The source says the inclined surface of the guide-vane body seats on its support and an O-ring provides the seal. Confirm mating dimensions, tolerances and retrieval details for the selected model.
Are remote monitoring and automatic control standard?
They are described as project capabilities, not a universal standard scope. Confirm sensors, control panel, protection logic, level instruments and communication protocol in the quotation.
What should I send for pump selection?
Provide flow, total dynamic head, water levels, intake and discharge data, water condition, temperature, installation, electrical supply, controls, materials, standards, quantity and destination.
Send the Duty Point and Station Layout
Provide the required flow, total head, operating levels, water condition, well arrangement, electrical supply and control scope. Norite can review the information for a model-specific selection and quotation.
Request Model Selection