Screw rotor
An eccentric screw rotor advances the medium through sealed cavities.
Progressive Cavity Pump (Single-Screw)
Progressive Cavity Pump (Single-Screw)
Continuous transfer of viscous and solids-bearing media.
A single-screw positive-displacement pump for viscous, particulate or fibrous media requiring stable flow and limited agitation.
Related resources: Chemical and petrochemical pump selection
- Installation
- Horizontal progressing-cavity arrangement
- Wet end
- Rotor / stator pair matched to medium
- Sealing
- Confirm material and shaft-seal configuration
- Drive
- Speed matched to the medium
models
Progressive Cavity Pump models & specifications
Check model references against the original performance table, speed, materials and operating conditions.
| Model reference | Catalogue scope | Specifications | Enquiry |
|---|---|---|---|
| ALG20-1 | Original catalogue reference | Source PDF ↗ | |
| ALG20-2 | Original catalogue reference | Source PDF ↗ | |
| ALG25-1 | Original catalogue reference | Source PDF ↗ | |
| ALG25-2 | Original catalogue reference | Source PDF ↗ | |
| ALG30-1 | Original catalogue reference | Source PDF ↗ | |
| ALG30-2 | Original catalogue reference | Source PDF ↗ | |
| ALG35-1 | Original catalogue reference | Source PDF ↗ | |
| ALG35-2 | Original catalogue reference | Source PDF ↗ | |
| ALG40-1 | Original catalogue reference | Source PDF ↗ | |
| ALG40-2 | Original catalogue reference | Source PDF ↗ | |
| ALG50-1 | Original catalogue reference | Source PDF ↗ | |
| ALG50-2 | Original catalogue reference | Source PDF ↗ | |
| ALG60-1 | Original catalogue reference | Source PDF ↗ | |
| ALG60-2 | Original catalogue reference | Source PDF ↗ | |
| ALG70-1 | Original catalogue reference | Source PDF ↗ | |
| ALG70-2 | Original catalogue reference | Source PDF ↗ | |
| ALG85-1 | Original catalogue reference | Source PDF ↗ | |
| ALG85-2 | Original catalogue reference | Source PDF ↗ | |
| ALG105-1 | Original catalogue reference | Source PDF ↗ | |
| ALG105-2 | Original catalogue reference | Source PDF ↗ | |
| ALG135-1 | Original catalogue reference | Source PDF ↗ | |
| ALG135-2 | Original catalogue reference | Source PDF ↗ |
Original technical pages
Use the original model table with its stated speed, impeller and units. A catalogue range does not guarantee a combined operating point.
overview
Progressive Cavity Pump (Single-Screw) construction and operation
Single-screw positive-displacement pump
A progressing-cavity pump moves liquid through the rotor and stator. Viscosity, solids, temperature, speed and dry-running risk influence the selected materials and operating limits.
A single-screw positive-displacement pump for viscous, particulate or fibrous media requiring stable flow and limited agitation.
- Eccentric screw rotor inside a fixed stator
- Progressing sealed cavities convey the medium
- Viscosity, particles, fibres and stator compatibility determine selection
AI-generated family illustrations. The selected configuration follows the agreed model and drawing.
construction
Components, materials and seals
Stator
The fixed stator works with the rotor; compatibility and wear depend on the liquid, particles and temperature.
Shaft sealing
Define the seal against the actual liquid and the available operating and maintenance conditions.
Drive & speed
Check speed, pressure, viscosity and the catalogue limits together. Include the required speed-control method.
AI-generated family illustrations. The selected configuration follows the agreed model and drawing.
duty requirements
Materials, sealing & duty requirements
Review medium name and composition, required flow, required differential pressure, operating temperature, suction conditions, installation arrangement, power supply and drive method, materials, standards and inspection requirements, required supply scope, full chemical composition and concentration, density and viscosity, flammability, toxicity, crystallisation and volatility, design pressure and temperature, seal and flushing requirements, applicable process standard 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 | Rotor / stator pair matched to medium |
|---|---|
| Sealing | Confirm material and shaft-seal configuration |
| Liquid / design limits | Confirm liquid composition, temperature, particles and operating conditions |
| 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 |
| required differential pressure | 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 |
| full chemical composition and concentration | Include this information in the duty review and model selection |
| density and viscosity | Include this information in the duty review and model selection |
| flammability, toxicity, crystallisation and volatility | Include this information in the duty review and model selection |
| design pressure and temperature | Include this information in the duty review and model selection |
| seal and flushing requirements | Include this information in the duty review and model selection |
| applicable process standard | 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
Rotor, stator & inlet
Match the rotor / stator pair to viscosity, solids, temperature and inlet conditions. Confirm dry-run protection and priming requirements.
Drive & speed control
Select speed against flow, differential pressure and the liquid. Confirm the gearbox / drive, supports and service access.
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
environmental services
For environmental services, specify flow, differential pressure, viscosity, particles and stator compatibility. Check the proposed arrangement against horizontal progressing-cavity arrangement and rotor / stator pair matched to medium, then verify the operating point on the selected model curve.
oil
For oil, confirm viscosity, temperature, suction conditions, seal plan and pressure envelope. Check the proposed arrangement against horizontal progressing-cavity arrangement and rotor / stator pair matched to medium, then verify the operating point on the selected model curve.
food
For food, specify flow, differential pressure, viscosity, particles and stator compatibility. Check the proposed arrangement against horizontal progressing-cavity arrangement and rotor / stator pair matched to medium, then verify the operating point on the selected model curve.
papermaking
For papermaking, specify flow, differential pressure, viscosity, particles and stator compatibility. Check the proposed arrangement against horizontal progressing-cavity arrangement and rotor / stator pair matched to medium, then verify the operating point on the selected model curve.
chemical processing
For chemical processing, provide the complete composition, concentration, temperature and seal-utility requirements. Check the proposed arrangement against horizontal progressing-cavity arrangement and rotor / stator pair matched to medium, 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
Progressive Cavity Pump FAQs
How do I select a model?
medium name and composition; required flow; required differential pressure; operating temperature; suction conditions; installation arrangement; power supply and drive method; materials, standards and inspection requirements; required supply scope; full chemical composition and concentration; density and viscosity; flammability, toxicity, crystallisation and volatility; design pressure and temperature; seal and flushing requirements; applicable process standard. Review the complete duty on the applicable model curve.
Which materials and sealing can be supplied?
Rotor / stator pair matched to medium. Confirm material and shaft-seal configuration. 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
- required differential pressure
- operating temperature
- suction conditions
- installation arrangement
- power supply and drive method
- materials, standards and inspection requirements
- required supply scope
- full chemical composition and concentration
- density and viscosity
- flammability, toxicity, crystallisation and volatility
- design pressure and temperature
- seal and flushing requirements
- applicable process standard