Robust water supply from wells
When using water from wells, farms and businesses require a solution that is not only reliable but also energy efficient. Our high-performance, low-maintenance pumps keep operating costs to a minimum. The 100% stainless-steel SP pump offers superior corrosion resistance, which can help to ensure a long operation life even in the most demanding environments.
Combine a pump with our variable frequency drive, MP204 pump protection unit, pump control panels, and/or our Remote Management Systems for optimized operation and protection from common application issues like dry-running and power supply irregularities.
Use our water cycle animation and find which products match your project
Starting with the water network, Grundfos supplies cost effective, reliable and energy optimised pumping solutions for raw water intake; pumping, dosing and disinfection solutions for each stage of the water treatment cycle; and pumps and controls for the entire water distribution system, including main and local pumping stations.
For the wastewater network, Grundfos supplies dependable, energy efficient solutions for wastewater transport and flood control, ensuring that downtime is reduced, and risk minimisation is built into the system.
And at the wastewater treatment plant, Grundfos facilitates reliable operation and low total cost of ownership through a broad range of products and solutions for mechanical, biological and chemical treatment.
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Get answers to your questions about this application
We have gathered frequently asked questions and their answers in one place. See the most frequently asked questions below or go to the Grundfos FAQ for a complete list of answers to your questions about our products.
What types of media can I pump with a submersible pump?
Pure, low-viscosity, non-explosive media without solid matter or long fibrers.
If a liquid with a density differing from that of water is to be pumped, the motor power required due to the change in hydraulic power should be taken into account.
When pumping fluids more aggressive than drinking water, the special material construction pump versions such SP N, SP R and SPNE should be used.Read more
Is it possible for submersible motor pumps to run dry?
Dry running of the pump can damage the mechanical seal and the motor. For this reason, the float switches should be arranged so that the fill level in the shaft does not fall below the minimum level required to operate the pump. (See also ‘What minimum fill level is required to properly operate the pump?’). The actual conditions prevailing in the application in question must therefore always be reconciled with the information provided in the operating instructions or the datasheet before initial start-up of the pump.Read more
How do I set the motor protection on a submersible pump?
Setting the motor protection on a submersible pump
The overcurrent release integrated into the motor-protection switch must trip on cold start in less than 10 seconds at five times the maximum motor current stamped on the rating plate.
In order to provide the best possible protection to the submersible motor, the motor-protective switch should be set in accordance with the following guidelines:
1. Set overcurrent release to the stamped maximum motor current.
2. Let the pump run for half an hour at normal power.
3. Set the overcurrent release successively lower until the trip point is reached.
4. After that, set the overcurrent release 5% above this trip point.
If the tripping characteristic of the motor-protection switch does not fulfil these requirements, the motor warranty is void. The maximum adjustment value of the overcurrent release must not exceed the maximum motor current stamped on the rating plate. For motors wound for star-delta start-up, proceed as follows when setting the motor-protection switch, but note that the protective switch setting must not exceed a maximum value of:
Protective switch setting = stamped max. current x 0.58.
The maximum permissible start-up time for star-delta starters or for motor switches with autotransformers is 2 seconds.
Grundfos offers different devices for motor protection like the MP204 module, for further information, refer to CAPS.Read more
Can the pump be operated using a frequency converter?
Grundfos offers numerous speed-controlled pumps that are referred to as ‘E-pumps’ and which come equipped with Grundfos MGE motors with an integrated frequency converter. The manufacturing costs and material inputs are lower compared to pump solutions with external frequency converters. In addition, technical issues that may arise in connection with external frequency converters are avoided.
Finally, MGE motors have numerous additional features and advantages. In the event that no E-pump is available for a specific application, it is generally possible to operate the three-phase industrial motors offered by Grundfos via an external frequency converter. The technical information set out in the operating instructions and datasheet should be referred to in each individual case.Read more
Inline single stage pumps
Endsuction close coupled single stage
Endsuction long coupled single stage
Horizontal split case pumps
Endsuction close coupled multistage
Inline multi stage pumps
Submersible wastewater pumps
Submersible groundwater pumps
Solar water pumping systems
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Enhance your knowledge
Find out how to get reduced energy consumption, increased comfort and unsurpassed operational reliability for your application. Read our customers' stories about how they benefit from the Grundfos approach to intelligence, water and energy, or search Grundfos research & insights for more learning materials, articles, white papers, videos and much more that benefit your solution.