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What is submersible pump and selection

What is submersible water pump

A submersible water pump is a type of pump specifically designed to operate underwater, submerged within a liquid, usually water. It is designed to effectively and efficiently move water from one location to another, utilizing a hermetically sealed motor to prevent water from entering the pump’s interior.

The submersible water pump is typically constructed with a waterproof housing that encases the motor and impeller. The motor is powered by electricity and converts electrical energy into mechanical energy, which drives the impeller. The impeller, or impellers in some cases, is responsible for creating the necessary pressure to move water through the pump.

Due to its submerged nature, the submersible water pump is highly efficient in terms of energy consumption. The surrounding liquid helps in cooling the motor, enhancing its lifespan. Additionally, these pumps are usually more quiet and vibration-free compared to other types of pumps.

Submersible water pumps

Submersible water pumps find applications in various fields, including residential, commercial, and industrial sectors. They are commonly used for drainage purposes, sump pumping, well water extraction, irrigation systems, fountain and pond circulation, as well as wastewater management. Their ability to operate underwater makes them suitable for situations where a standard surface pump would not be feasible or efficient.

centrifugal pump 

Submersible Water Pumps: Efficient Water Movement

Submersible water pumps are versatile devices designed to efficiently move water from one location to another, primarily used in wells or ponds. These pumps are submerged in water, providing a reliable method for extracting water from underground sources.

Working Principle of Submersible Pumps

The pump consists of a hermetically sealed motor connected to an impeller. When the motor is activated, it drives the impeller, creating a centrifugal force that draws water into the pump through intake ports. As water enters the pump, it is channeled into diffusers and volutes, increasing pressure and directing the flow towards the outlet. The water is then forced out through a discharge pipe.

Advantages of Submersible Pumps

One significant advantage is their silent and efficient operation. Submersible pumps do not require priming, and the surrounding water helps cool the motor, ensuring optimal performance and longevity.

Applications of Submersible Pumps

Submersible pumps are used in various applications, including residential water supply, irrigation, drainage, and wastewater management. They are also used in industrial settings for cooling and firefighting systems.

Maintenance Tips for Submersible Pumps

Regular maintenance is essential to ensure the proper functioning of submersible pumps. This includes checking for any leaks, cleaning the intake screens, and ensuring the motor is properly lubricated.


Working Principle of submersible pump

A submersible water pump is a type of pump that operates underwater, designed to pump water from a submerged location. Its working principle involves a compact electric motor tightly sealed within a waterproof casing, enabling the pump to function efficiently even when fully submerged.

When activated, the electric motor inside the submersible pump begins to rotate. The rotation drives an impeller, which is a series of curved blades positioned on a shaft. As the impeller rotates, it creates a centrifugal force that propels water towards its outer edges. This force increases the pressure of the water, causing it to move towards the discharge outlet.

The water is drawn through an intake screen or filter, preventing debris or solid particles from entering the pump. Once inside, it flows into the impeller, which then pushes it out through the pump’s outlet pipe. The outlet pipe directs the water to the desired location, such as a water tank or irrigation system.

To prevent the electric motor from getting damaged by the water, the submersible pump is constructed with watertight seals and insulation. These protective measures ensure that the motor remains isolated from the surrounding liquid, allowing it to operate safely and efficiently.

Submersible water pumps are commonly used for various applications, including well pumping, drainage, sewage systems, and fountain installations. Their submersible nature allows them to operate without the need for priming, providing reliable and consistent water flow even in deep or challenging environments.

Components of a Submersible Pump

A submersible pump consists of several key components. The motor is hermetically sealed to prevent water entry and is connected to an impeller. The impeller is responsible for generating centrifugal force, which draws water into the pump through intake ports. Once inside, the water is channeled through diffusers and volutes, increasing pressure and directing the flow towards the pump’s outlet. Finally, the water is expelled through a discharge pipe to its destination.

Pump Sizing Calculation And Selection

What are the types submersible pump?

There are mainly six types of submersible pump uses now day these are followings
  1. Utility types pump.
  2. Grinder type pump.
  3. Deep well pump.
  4. Bladder type pump.
  5. Bottom suction pumps (bore well type pump).
  6. Fountain pump.

Submersible water pumps are designed to be fully submerged in water during operation. They are widely used for various applications, including residential, industrial, and agricultural purposes. These pumps are efficient, reliable, and offer several advantages over other types of pumps.

There are different types of submersible pumps available, each designed for specific applications. The most common types include:

  • Borewell Pumps: These pumps are specifically designed for extracting water from deep wells or boreholes. They are capable of handling high water pressures and are commonly used in domestic and agricultural water supply systems.
  • Sewage Pumps: Sewage submersible pumps are designed to handle wastewater and sewage containing solid particles. They are commonly used in residential, commercial, and municipal applications for sewage and wastewater management.
  • Fountain Pumps: Fountain submersible pumps are used for creating beautiful water features, such as fountains, waterfalls, and pond aerators. These pumps are designed to handle relatively low water flow rates and provide aesthetic appeal to outdoor spaces.
  • Effluent Pumps: Effluent submersible pumps are used for pumping gray water or wastewater from septic tanks or sump pits. They are commonly employed in residential and commercial settings for efficient drainage and wastewater management.
  • Well Pumps: Well submersible pumps are used for extracting water from shallow wells or reservoirs. They are suitable for domestic water supply systems, irrigation, and small-scale agricultural applications.

Each type of submersible pump has specific features and capabilities to meet different requirements. It is essential to select the appropriate type based on the intended application to ensure optimal performance and longevity of the pump.

How to select best submersible pump?

There are many factors responsible for select a good submersible pump. These factors are described below.
  1. How much liquid has to be discharged?
  2. What is the size of tanks are wells where pump to be install?
  3. How much heads to be need it means elevation to discharge.
  4. Rate of the discharge of flow
  5. Pressure requirement
  6. Temperature of the service liquid.
  7. Nature of the service liquid
  8. Power consumption of the motor and economic condition of the user.
  9. This is available in 1 hp to 250 hp powers.
  10. Capacity is approx. 20 to 28000 litre per minute. And total head approx. .4 bar to 6 be.

What is part use in submersible pump?

Parts of submersible pump

Some of the important parts are described below. Impeller, casing, shaft, coupling, electric motor, diffuser, check valve, electric cable.

Which pipe is best for submersible pumps?

The pipe selection depend on the the fluid nature, economy, life of requirement  mostly PVC pipe use with this type of pump because of its low pressure and less flow design.

When submersible pump pumping low water flow what are the reason it?

For the troubleshooting of the submersible pump when it operates at low pressure, following check point need to be check before take maintenance that are following.
  1. Check the required electricity
  2. Insure any leakage in suction side.
  3. Check impeller condition (clogs, open)
  4. Obstruction in discharge line.
  5. Check available suction head.

What is advantages and disadvantages of submersible pump?

Advantages of parts submersible pump

  1. This pump does not need to primed.
  2. Efficiency is more than centrifugal pump.
  3. Its ca be handling slurry and fine liquid as well.
  4. Less noisy.

Disadvantages of submersible pump

  1. High risk of maintenance.
  2. Down time is more as compare to other type of pump.
  3. Troubleshooting is difficult, corrosion issue.
  4. Little expansive than other types of pump.
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