Stage impellers
Multiple impellers develop the required head. Select stage count with flow, speed and the complete curve.
Horizontal Multistage Boiler-Feed Pump
Horizontal Multistage Boiler-Feed Pump
Multistage delivery for boiler feed and high head.
The QD horizontal multistage boiler feed water pump serves high-head clean-water and hot-water duties using the appropriate temperature version. Review model data, feedwater temperature, inlet conditions, flow and total head together before selecting the stage count and arrangement.
Related resources: Boiler feed and high-head pump selection
- Installation
- Horizontal segmental multistage
- Wet end
- Wetted materials selected for the liquid and temperature
- Sealing
- Seal and cooling matched to feedwater
- Drive
- Motor and coupling
models
Horizontal Multistage Boiler-Feed Pump models & specifications
Check model references against the original performance table, speed, materials and operating conditions.
| Model reference | Catalogue scope | Specifications | Enquiry |
|---|---|---|---|
| QD6-25 | Original catalogue reference | Source PDF ↗ | |
| QD12-25 | Original catalogue reference | Source PDF ↗ | |
| QD12-50 | Original catalogue reference | Source PDF ↗ | |
| QD25-30 | Original catalogue reference | Source PDF ↗ | |
| QD25-50 | Original catalogue reference | Source PDF ↗ | |
| QD46-30 | Original catalogue reference | Source PDF ↗ | |
| QD46-50 | Original catalogue reference | Source PDF ↗ | |
| QD85-45 | Original catalogue reference | Source PDF ↗ | |
| QD85-67 | Original catalogue reference | Source PDF ↗ | |
| QD155-30 | Original catalogue reference | Source PDF ↗ | |
| QD155-67 | Original catalogue reference | Source PDF ↗ | |
| QD280-43 | Original catalogue reference | Source PDF ↗ | |
| QD280-65 | Original catalogue reference | Source PDF ↗ | |
| QD360-40 | Original catalogue reference | Source PDF ↗ | |
| QD450-60 | Original catalogue reference | Source PDF ↗ | |
| QD500-57 | Original catalogue reference | Source PDF ↗ | |
| QD580-60 | Original catalogue reference | Source PDF ↗ | |
| QD720-60 | Original catalogue reference | Source PDF ↗ |
Original technical pages
- Open source PDF page 5 ↗
- Open source PDF page 6 ↗
- Open source PDF page 7 ↗
- Open source PDF page 8 ↗
- Open source PDF page 9 ↗
- Open source PDF page 10 ↗
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- Open source PDF page 18 ↗
- Open source PDF page 19 ↗
- Open source PDF page 20 ↗
- Open source PDF page 21 ↗
- Open source PDF page 22 ↗
Use the original model table with its stated speed, impeller and units. A catalogue range does not guarantee a combined operating point.
overview
Horizontal Multistage Boiler-Feed Pump construction and operation
Horizontal multistage centrifugal pump
The impeller transfers energy to the liquid through the pump casing. Final selection depends on the model curve, liquid properties, sealing arrangement, drive and piping conditions.
A horizontal multistage pump for high-head clean-water, hot-water and boiler-feed duties.
- Horizontal segmental multistage construction
- Pump rotor supported at both ends
- Temperature version, stage count and inlet conditions reviewed for boiler feed
AI-generated family illustrations. The selected configuration follows the agreed model and drawing.
construction
Components, materials and seals
Segmental casing
Suction, intermediate and discharge sections form the casing assembly. Confirm pressure and temperature version.
Balance & shaft seals
The rotor includes a balance disc and shaft sleeves. Seal and cooling requirements follow the operating conditions.
End bearings & coupling
The rotor is supported at both ends and driven through a flexible coupling. Plan alignment and maintenance space.
duty requirements
Materials, sealing & duty requirements
Review medium name and composition, required flow, total head, operating temperature, suction conditions, installation arrangement, power supply and drive method, materials, standards and inspection requirements, required supply scope, npsha, continuous-duty requirement together with the liquid composition, temperature and installation. The values on a catalogue page are not a substitute for checking the selected model curve and approved arrangement.
| Wetted components | Wetted materials selected for the liquid and temperature |
|---|---|
| Sealing | Seal and cooling matched to feedwater |
| Liquid / design limits | Clean water; temperature-specific version |
| medium name and composition | Include this information in the duty review and model selection |
| required flow | Include this information in the duty review and model selection |
| total head | Include this information in the duty review and model selection |
| operating temperature | Include this information in the duty review and model selection |
| suction conditions | Include this information in the duty review and model selection |
| installation arrangement | Include this information in the duty review and model selection |
| power supply and drive method | Include this information in the duty review and model selection |
| materials, standards and inspection requirements | Include this information in the duty review and model selection |
| required supply scope | Include this information in the duty review and model selection |
| NPSHa | Include this information in the duty review and model selection |
| continuous-duty requirement | Include this information in the duty review and model selection |
AI-generated family illustrations. The selected configuration follows the agreed model and drawing.
installation
Installation & drive arrangement
Foundation & piping
Check mounting, alignment, pipe supports and suction conditions. Keep pipe loads within the selected arrangement requirements.
Drive & maintenance
Confirm speed, driver, coupling or transmission and guarding. Provide access for seals, bearings and rotating-assembly maintenance.
Before installation
- Foundation / mounting and pipe supports
- Liquid supply and discharge connections
- Electrical supply and maintenance access
AI-generated family illustrations. The selected configuration follows the agreed model and drawing.
applications
Typical applications
boiler feed
For boiler feed, confirm viscosity, temperature, suction conditions, seal plan and pressure envelope. Check the proposed arrangement against horizontal segmental multistage and wetted materials selected for the liquid and temperature, then verify the operating point on the selected model curve.
hot-water transfer
For hot-water transfer, check the applicable product curve, liquid properties, required operating point and installation geometry. Check the proposed arrangement against horizontal segmental multistage and wetted materials selected for the liquid and temperature, then verify the operating point on the selected model curve.
high-pressure water transfer
For high-pressure water transfer, provide inlet pressure, target outlet pressure, peak demand, control method and the number of operating zones. Check the proposed arrangement against horizontal segmental multistage and wetted materials selected for the liquid and temperature, then verify the operating point on the selected model curve.
supply scope
Choose the supply scope for this pump
Define the pump configuration, installation interfaces, controls and documents in the quotation.
Pump assembly
Hydraulic end, materials, sealing and interfaces for your driver or installation.
Electric pump set
Pump and matched motor, coupling / transmission, base and guarding as applicable.
Installation & controls
Agreed supports, controls, auxiliaries, spares and technical documents.
AI-generated family illustrations. The selected configuration follows the agreed model and drawing.
manufacturing
From preparation to shipment
Casting of pump components
Casting produces pump components to the construction and material requirements of the selected equipment. The applicable alloy, pattern and component geometry depend on the pump family and the agreed operating conditions.
Finish machining
Machining prepares mounting faces, bores, fits and connection interfaces for assembly. OEM parts should be reviewed against the approved drawing and revision, including the dimensions that determine interchange and installation.
Component handling & staging
Owner-supplied factory photograph showing pump castings staged in a work area. The exact parts and process route depend on the selected order.
Inspection equipment & controls
Owner-supplied factory photograph showing test-control equipment. The inspection points and acceptance records must be agreed for the selected equipment.
documents
Technical documents
Source catalogue
Original series manual and technical references. Review the applicable model, version and units.
Open original PDF View family brochure ↗Model-specific documents
Request the selected model curve, arrangement drawing, materials, installation instructions and agreed inspection records.
Request technical documentsquestions
Horizontal Multistage Boiler-Feed Pump FAQs
How do I select a model?
medium name and composition; required flow; total head; operating temperature; suction conditions; installation arrangement; power supply and drive method; materials, standards and inspection requirements; required supply scope; NPSHa; continuous-duty requirement. Review the complete duty on the applicable model curve.
Which materials and sealing can be supplied?
Wetted materials selected for the liquid and temperature. Seal and cooling matched to feedwater. Confirm compatibility with the complete liquid composition and temperature.
Are catalogue model references guaranteed duty points?
Catalogue ranges summarize printed records and may combine different conditions. Check each model against its source curve and required speed.
What is included in the delivery?
Confirm pump, driver, controls, auxiliaries, spares, drawings, manuals and required test records in the agreed quotation.
enquiry
Tell us about your pump duty
Describe the liquid, required output and site arrangement so BBP can review the model and equipment scope.
- medium name and composition
- required flow
- total head
- operating temperature
- suction conditions
- installation arrangement
- power supply and drive method
- materials, standards and inspection requirements
- required supply scope
- NPSHa
- continuous-duty requirement