Submersible pumps.Start with the duty.
Bring the liquid, operating point and installation together. Explore submersible pump configurations and discuss the hydraulic, motor and protection requirements with Petropedam.
The motor goes below the liquid level.
A submersible unit combines the pump with a motor designed for the specified immersion conditions. Hydraulic selection, cooling, seals and cable entry all matter to reliable operation.
Submersible does not mean one hydraulic design.
Volute arrangements are common in drainage and wastewater service. Multistage diffuser arrangements are common in borehole water supply. Impeller design, solids passage and the operating curve determine the actual fit.
Looking for a vertical shaft pump?
A vertical pump with its motor above the liquid is a different arrangement. Review the vertical centrifugal families when that installation better matches your project.
Explore centrifugal pump families ↗See the arrangement.
Confirm the specification.
These images illustrate submersible motor-pump arrangements. Ask for the identified model, performance curve and installation drawing for your duty before final selection.
View full image ↗Vertical motor-pump assembly
A vertical assembly with an integrated motor, lifting point and side discharge. Check dimensions and connections against the proposed installation.
What to confirm
Confirm the model code, certified duty curve, motor rating, discharge size, minimum liquid level and lifting instructions.
View full image ↗Submersible centrifugal configuration
A motor-pump arrangement for review against the liquid and operating duty. The impeller and motor execution must be identified for the application.
What to confirm
Confirm impeller geometry, solids passage, materials, seal arrangement, immersion limits, motor cooling and the required protection devices.
Compare volute and diffuser arrangements
Common arrangements, not a substitute for a model-specific curve and liquid assessment. Scroll the table horizontally on a small screen.
| Review point | Volute arrangement | Diffuser / multistage arrangement |
|---|---|---|
| Typical context | Drainage, sewage and wastewater transfer | Borehole water supply and higher-head clean-water duties |
| Hydraulic focus | Impeller type, solids handling and operating range | Stage count, curve, well diameter and water quality |
| Installation focus | Wet-well geometry, guide system and discharge connection | Motor cooling flow, setting depth and riser arrangement |
| Always verify | Duty curve, liquid compatibility, allowable immersion and motor limits for the selected model | |
Different liquids.
Different priorities.
Start with the service conditions. A pump suitable for clean water is not automatically suitable for fibrous wastewater, abrasive slurry or a hazardous area.
Wells & process water
Review water quality, drawdown, total head and motor cooling. Borehole diameter and installation depth influence the arrangement.
Prepare the duty →Sewage & drainage
Describe solids, fibres and liquid chemistry. Check clogging risk, free passage, wet-well levels and the maintenance access.
Prepare the duty →Stormwater & site water
Include variable water levels, sand content and duty cycle. Abrasive mine or construction water requires a specific material and hydraulic review.
Prepare the duty →Six inputs for a better selection.
Send your operating data and an installation sketch. We can review the pump, motor, controls and installation requirements together.
- 01 · Flow & total headMinimum, normal and maximum flow; static lift, pipe losses and the system curve where available.
- 02 · Liquid & solidsTemperature, pH, density, chemistry, solids size and concentration, fibres and abrasive content.
- 03 · Levels & geometryMinimum and maximum liquid levels, sump or well dimensions, inlet layout and available submergence.
- 04 · Motor & supplyVoltage, frequency, duty cycle, starts per hour, cable length and the proposed starting or speed-control method.
- 05 · Cooling & protectionRequired cooling flow or jacket, level control, dry-run prevention, thermal and leakage monitoring where specified.
- 06 · Installation & accessFixed or portable arrangement, guide rails or riser, discharge connection, lifting route and maintenance access.
Installation and service count.
Check intake conditions and motor cooling across the operating range. Use the selected manufacturer's installation and maintenance instructions for the final arrangement.
Check the full system.
Confirm allowable immersion, minimum operating level, cable support, discharge loads and safe lifting. Dry installation is suitable only for models explicitly designed for it.
Review your installation ↗Make the service request specific.
Share the nameplate, operating history and symptoms. Seal, cable-entry, bearing and insulation checks should follow the unit's manual and the agreed inspection scope.
Discuss inspection & service ↗
Keep the model data with the pump.
Request the performance curve, motor data, installation drawing and maintenance instructions for the selected unit. This illustrative image does not define a model or its ratings.
Request technical documentation ↗Submersible pump essentials.
Does a submersible pump need priming?
A submerged inlet is normally flooded, so conventional surface-pump priming is generally unnecessary. Minimum submergence, venting where required and intake conditions still need to follow the selected unit’s instructions.
Can a submersible pump run dry?
Do not assume it can. The liquid may provide motor cooling and seal lubrication. Confirm the allowable liquid level, cooling arrangement and dry-run protection for the selected model.
Does an immersion rating cover any depth or hazardous area?
No. Verify the rated depth, duration, liquid temperature and cable-entry limits. Immersion protection is separate from the hazardous-area certification required for a classified location.
Can the same pump handle clean water and sewage?
Suitability depends on the identified model, impeller, solids passage, materials and liquid conditions. A clean-water pump should not be specified for sewage solely because it is submersible.
Which documents should accompany a selection?
Request the model-specific duty curve, efficiency and power data, motor and protection details, dimensional drawing and installation instructions. Include any project certification and testing requirements in the enquiry.
Have a duty point or a problem unit?
Send the liquid details, required flow and head, or the existing nameplate. Start a focused technical discussion with Petropedam.
Explore all pump families ↗ · Final suitability and operating limits depend on the identified model and approved project data.