Key Features
- Multistage hydraulic design: Impeller and diffuser configurations are selected to achieve the required flow and head for deep-well applications.
- Material configurations: Cast iron, SS304, SS316/SS316L, duplex, super duplex, SS904L and bronze options are available according to the selected pump series and water conditions.
- Submersible motor options: Water-filled motor configurations and electrical specifications can be reviewed according to the selected pump model and project requirements.
- Electrical customization: Voltage, frequency, cable length and control-panel requirements can be reviewed for different markets and installations.
- Performance-based selection: Recommended models can be supported by pump performance curves and motor specifications.
- Inspection and testing: Material inspection, balancing, performance testing and other applicable tests can be arranged according to the confirmed product specification.
How Does a Submersible Well Pump Work?
Pump Design and Working Principle
SLAPK submersible well pumps use multistage centrifugal hydraulics to generate the head required for deep-well water extraction. The number of stages and motor power are selected according to the required operating point.
For a detailed explanation of the pump components and hydraulic process, see our Submersible Well Pump Structure and Working Principle.
Material Selection
Pump materials should be selected according to the water chemistry, temperature, abrasive content and expected operating conditions.
| Material | Typical Selection Considerations |
|---|
| Cast Iron | Standard clean-water applications where corrosion conditions are suitable |
| SS304 | Relatively mild water conditions requiring stainless steel construction |
| SS316 / SS316L | Applications requiring improved corrosion resistance compared with SS304 |
| Duplex Stainless Steel | More demanding water conditions where higher corrosion resistance and mechanical strength may be required |
| Super Duplex Stainless Steel | Selected aggressive or high-chloride environments, subject to water analysis |
| SS904L | Specific chemically aggressive applications requiring material compatibility assessment |
| Bronze | Selected water conditions and project specifications where the alloy is technically suitable |
For corrosive groundwater, provide the water analysis, including pH, chloride concentration and temperature. The suitability of the complete pump assembly—not only the casing material—must be confirmed before ordering.
For water containing significant sand, hydraulic design and abrasion resistance should also be evaluated. Corrosion-resistant materials do not automatically provide sufficient abrasion resistance.
Information Required for Pump Selection
Basic Project Requirements
To receive an initial pump recommendation and quotation, please provide:
- Required flow rate (m³/h)
- Required head (m), if known
- Application
- Voltage and frequency
- Quantity
- Destination country
Additional Technical Information
For detailed engineering selection, the following information may also be required:
- Well depth and casing diameter
- Static and dynamic water levels
- Proposed pump installation depth
- Discharge-pipe diameter and length
- Required outlet pressure
- Water temperature, chemistry and sand content
- Daily operating hours
- Cable length and material requirements
If the required head is not known, send the available well and pipeline information. SLAPK can review the data needed to calculate the system head before confirming a model.
How to Read a QJ Pump Model
A model such as 200QJ20-135/10 generally indicates the pump diameter series, pump type, rated flow, rated head and number of hydraulic stages.
For example:
- 200: Applicable min well diameter
- QJ: Submersible well pump type
- 20: Rated flow in m³/h
- 135: Rated head in metres
- 10: Number of pump stages
Model coding can vary between product series. The final performance should therefore be confirmed using the corresponding pump curve and technical data sheet.
Frequently Asked Questions
Can SLAPK supply submersible well pumps for sandy water?
Pump suitability depends on the sand concentration, particle characteristics, hydraulic design and materials. Please provide the available water-quality information so the operating conditions can be reviewed before model selection.
Can you supply 60 Hz motors and customized voltage?
Voltage, frequency and motor configurations can be reviewed according to the destination country and selected pump model. Please confirm the required electrical supply when requesting a quotation.
Can you provide a pump performance curve before ordering?
Yes. A suitable pump model can be recommended based on the required flow and head, with the corresponding performance curve and motor specifications provided for technical review.
Request a Pump Selection
Send SLAPK your required flow, Total Dynamic Head, static and dynamic water levels, well diameter, installation depth, water quality, voltage and frequency. Our engineering team will review the duty point and recommend a suitable pump model, motor power, material and number of stages.
Send Your Well Pump Parameters
