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Submersible pumps SP

Submersible pumps SP
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Submersible pumps SP
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774.61€
Ex Tax: 774.61€
  • Stock: In Stock
  • Brand: Grundfos
  • Model: SP 3A-6 3x400V
  • Weight: 21.00кг
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Grundfos SP – submersible pumps for deep wells and boreholes

Grundfos SP is a series of energy-efficient submersible pumps for pumping clean water from deep wells, boreholes and underground water tanks. The pumps are available in a wide range of flow rates and heads, with different materials and the possibility of combining with a suitable submersible motor.

Wide range of flow rates from 1 to over 280 m³/h and multi-variant designs for various applications.
High efficiency Optimized hydraulics and the option to choose highly efficient motors.
Durable materials Stainless steel and the possibility of versions for aggressive environments.

Main advantages of Grundfos SP

  • Multistage centrifugal submersible pumps for clean water from wells and boreholes.
  • Wide range of flow rates – from about 1 m³/h to over 280 m³/h depending on the model.
  • Possibility to choose the number of stages to achieve the required pressure.
  • Energy-efficient hydraulics, meeting pump efficiency requirements.
  • Possibility of different materials: standard stainless steel and versions for more aggressive environments.
  • Built-in check valve to prevent backflow when stopping.
  • Water-lubricated bearings with sand channels that allow small particles to escape with the fluid.
  • Inlet strainer that limits the entry of large particles into the pump.
  • Possibility of combination with Grundfos MS and MMS submersible motors in various capacities and versions.
  • Suitable for water supply, irrigation, groundwater lowering, fountains and industrial applications.

Applications

  • Pumping raw water from underground wells and boreholes.
  • Water supply to settlements, industrial sites and agricultural farms.
  • Irrigation of agricultural areas and garden systems.
  • Lowering groundwater levels during construction and mining activities.
  • Fountain and decorative water systems.
  • Industrial applications including mining and offshore installations.
SP pumps are designed for clean, non-aggressive liquids without solids and fibers larger than grains of sand. For more aggressive media, special versions with suitable materials and seals are available.

How do you read the model designation?

The model designation follows the logic SP XY , where:

  • SP – series of submersible well pumps.
  • X – pump size and basic flow rate (e.g. 3A, 5A, 7, 9, 11, 14, 17, etc.).
  • Y – number of stages that determines the head (e.g. -6, -9, -12, -17, etc.).

A higher number before the dash means a higher possible flow rate. A higher number after the dash means more stages and higher head.

The pumps are combined with a suitable submersible motor (MS or MMS) according to the required power, voltage and operating conditions. The motor is selected separately according to the pump curve and duty point.

Working conditions

  • The pumps are designed for clean, non-aggressive liquids, similar to water.
  • The maximum liquid temperature is usually up to 60 °C in standard versions.
  • The minimum flow around the motor must provide sufficient cooling.
  • It is recommended that the pump not operate for a long time at a flow rate that is too low or too high compared to the nominal flow rate.
  • For more aggressive fluids, versions with suitable materials and seals are available.

Installation guidelines

  • The pump is installed vertically in the borehole or well, submerged below the water level.
  • The recommended minimum borehole diameter depends on the pump model and any connecting elements.
  • Sufficient water flow around the motor must be ensured for proper cooling.
  • When installing in a borehole, follow the recommendations for minimum hole diameter according to the model.
  • Use appropriate check valves, shut-off valves and surge and lightning protection.

Construction and materials

Grundfos SP are multistage centrifugal pumps with radial impellers, made mainly of stainless steel. The design is lightweight, which facilitates installation and maintenance in wells and boreholes.

Main components and materials

Component Material (standard) Purpose
Valve body and pump chambers Stainless steel Basic construction of the hydraulic part.
Impellers Stainless steel They transmit the energy of the water and provide pressure.
Shaft Stainless steel It transmits rotation from the motor to the impellers.
Camps Water-lubricated, with rubber or composite elements They ensure shaft stability and allow the passage of small particles.
Inlet strainer Stainless steel Limits the entry of large particles into the pump.
Check valve Built into the pump part Prevents backflow when the pump stops.
Gaskets NBR, FKM (depending on version) They ensure tightness and resistance to various liquids and temperatures.

Material implementations

The SP series is available in different material versions according to the aggressiveness of the environment:

  • Standard version: Stainless steel for clean water and normal conditions.
  • Performance for more aggressive environments: Special grades of stainless steel and seals for higher corrosion resistance.
  • Eco performance (SP NE): For aggressive and slightly contaminated liquids, with improved component resistance.
For the specific material of the housing, impellers and seals, see the data sheet of the respective model and version. In aggressive environments, the choice of material is critical for the service life.

Design advantages

  • Water-lubricated bearings with sand channels: Allow small solid particles to escape with the fluid, reducing the risk of seizing.
  • Inlet strainer: Protects the pump from large particles and fibers entering.
  • Built-in check valve: Reduces the risk of water hammer and reverse flow when stopping.
  • Lightweight stainless steel construction: Easy installation and maintenance in wells and boreholes.
  • Multi-stage hydraulics: Allows flexible selection of pressure by changing the number of stages.
  • Compatibility with different motors: Ability to choose a motor according to the application and conditions.

Approvals and safety

Grundfos SP is designed for use with clean water in wells, boreholes and industrial systems. The pumps meet the applicable European requirements for efficiency and safety. [31]

Efficiency

Some SP models meet the requirements of the ErP directive for energy efficiency of pumps, with a minimum efficiency index MEI ≥ 0.40 and in many cases above 0.70 for the most efficient models. [31]

Safe operation

  • Use the pump only for the intended liquids and operating conditions.
  • Ensure sufficient flow around the motor for proper cooling.
  • Follow the recommendations for minimum drilling diameter and installation depth.
  • Use appropriate electrical protection (motor fuse, surge and lightning protection).
  • When working with aggressive or hazardous liquids, observe special safety and material requirements.
  • Always disconnect power before servicing or removing.
For specific certificates, approvals and test reports, see the certificates section in the SP series technical catalogue or in the Grundfos Product Center.

Comparison of Grundfos SP models

The SP series includes many models with different flow rates and head. The main difference between the models is the pump size (flow rate) and the number of stages (head). All models listed below are with three-phase power supply 3×400 V. [31]

Model Approximate flow rate Number of degrees Main application
SP 3A-6 3×400 V up to 3 m³/h 6 Small wells, moderate pressure required.
SP 3A-9 3×400 V up to 3 m³/h 9 Deeper wells and taller buildings.
SP 3A-12 3×400 V up to 3 m³/h 12 Deep wells, high pressure requirements.
SP 3A-15 3×400 V up to 3 m³/h 15 Very deep wells and tall buildings.
SP 5A-8 3×400 V up to 5 m³/h 8 Medium wells with higher flow rates.
SP 5A-21 3×400 V up to 5 m³/h 21 Deep wells with high pressure.
SP 7-12 3×400 V up to 7 m³/h 12 Large wells with high flow and pressure.
SP 7-17 3×400 V up to 7 m³/h 17 Deep wells and large water supply systems.
SP 9-8 3×400 V up to 9 m³/h 8 Medium and large wells with higher flow rates.
SP 9-13 3×400 V up to 9 m³/h 13 Deeper wells and larger systems.
SP 11-11 3×400 V up to 11 m³/h 11 Large wells and systems with high flow and pressure.
SP 14-6 3×400 V up to 14 m³/h 6 Large systems with high flow and moderate head.
SP 14-8 3×400 V up to 14 m³/h 8 Large wells with higher pressure requirements.
SP 17-4 3×400 V up to 17 m³/h 4 Very large systems with high flow and moderate head.

How to choose an SP model?

  • Flow rate: Select the pump size (3A, 5A, 7, 9, 11, 14, 17) according to the required flow rate in m³/h.
  • Head: Select the number of stages (-6, -9, -12, -17, etc.) according to the depth of the well and the required pressure in the system.
  • Power supply: All models listed are 3×400 V – three-phase, suitable for professional installations.
  • Motor: The motor is selected individually according to the pump curve, duty point and installation conditions.
For the exact flow and head, see the hydraulic curves of the respective model in the technical catalogue or in the Grundfos Product Center. The selection of motor and number of stages is made based on the specific duty point (flow and head).

The data is consistent with the provided technical catalogue for Grundfos SP. Check the specific model, number of stages, material, compatible motor and operating conditions before ordering and installation.

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