Submersible Pumps

If you need to manage water from deep sources or evacuate water after a flood, a submersible pump is often the ideal solution. Whether you're looking for a pump for residential or professional use, it's essential to understand its operation, advantages, and how to choose the right product for your needs. Let's explore the role and functioning of submersible pumps, along with the criteria to consider when selecting the appropriate model.

 

What is a Submersible Pump and What Does It Do?

A submersible pump is designed to be submerged in water. Unlike other types of pumps, it operates directly within the liquid, allowing it to draw water from significant depths, such as in a well, a cistern, or a groundwater table. Its hermetically sealed motor can withstand the surrounding water pressure while ensuring smooth evacuation.

 

This type of pump is ideal for situations where water needs to be pumped from low or deep points, such as wells or tanks. It is commonly used for drainage, irrigation, or evacuating water after flooding. Some models are also suitable for handling dirty water, which contains particles or debris, thanks to their built-in filtration systems.

 

How Does a Submersible Pump Work?

The operation of a submersible pump is based on a simple but effective mechanism. Once submerged, the pump draws in liquid through an impeller. This impeller, powered by the internal motor, creates pressure that pushes the water through a discharge pipe, allowing for its evacuation. Unlike a surface pump, a submersible pump does not need to be primed, as it is already immersed in the liquid it needs to move.

 

The motor of the submersible pump is designed to withstand surrounding water pressure, ensuring great durability and consistent performance. Depending on the model, the pump can achieve varying discharge heights and flow rates, making it adaptable to the specific needs of each application, whether for a well, cistern, or emergency drainage.

 

Submersible pumps are generally powered by the electrical grid and are designed to operate continuously without overheating, thanks to optimal motor insulation. This reliability makes them suitable for tasks requiring prolonged use.

 

How to Choose Your Submersible Pump

 

To choose the right submersible pump for your needs, several criteria must be considered to ensure that the product fits your intended use:

 

1. Flow Rate and Discharge Height: The flow rate, or the amount of water the pump can evacuate in an hour, is a crucial factor. It’s important to select a pump that can provide sufficient flow for your application, whether it's garden irrigation, wastewater evacuation, or well drainage. Similarly, the discharge height—the vertical distance between the pump and the discharge point—should meet your needs to avoid pressure loss.

 

2. Type of Water: Depending on whether you're pumping clear water or dirty water (containing debris, sand, or particles), the pump model must be appropriate. For dirty water, it's advisable to choose a pump equipped with a robust filtration system to protect the motor and prevent clogging.

 

3. Motor Power: The motor is the central element of the submersible pump. A more powerful motor can move larger volumes of water over longer distances. However, it's important to select a model suited to your specific needs to avoid excessive energy consumption.

 

4. Price and Delivery: The price of a submersible pump can vary based on its features, such as flow rate, motor power, and discharge height. It's advisable to compare multiple options based on your budget and needs. Additionally, ensure that the delivery includes all necessary accessories for a quick and easy installation, and that the delivery time meets your requirements, especially in emergencies.

 

5. Pressure Resistance: If you have a deep well or plan to use the pump in environments where water pressure is significant, ensure that the chosen model can withstand these conditions once submerged, without affecting its performance.

 

SFA Submersible Pumps

As an expert in lifting and water evacuation since 1958, SFA offers a wide range of submersible pumps to meet various needs and budgets. Here’s a detailed presentation of some of our pumps:

 

Sanipump SLD 700: This pump is designed for rainwater lifting stations, capable of handling heavy rainwater flow (48 m³/h) as well as wastewater. It features a dual-channel impeller with a 50 mm free passage and is available in three models: single-phase or three-phase.

 

- Sanisub 400: This submersible pump for clear water is designed for draining water during occasional floods (in basements or living areas) and for pumping from sumps. It can be submerged up to 7 m deep, activates automatically, and lifts water up to 7.5 m with a particle size of 10 mm.

 

- Sanisub ZPK: Designed for evacuating floodwaters, clear water, and domestic greywater, it can be submerged up to 5 m deep and activates automatically via an adjustable float. It lifts water up to 10 m with a particle size of 10 to 30 mm.

- Sanipuddle is a so-called mop pump because it leaves only a small millimeter of water that will be easily absorbed by a mop. Supplied with a 10M power cable with plug it is immediately operational once out of the box. Its lifting height of 7m makes it easy to empty cellars and garages, and its standard non-return valve and DN25 outlet hose connection complete its ease of use. - Sanisub Steel is a stainless steel pump for pumping water from cellars, garages or rainwater manholes. Sanisub Steel with its flow rate of 9m3 and its lifting height of more than 7m makes it possible to intervene efficiently. Available in kit form with a basket that protects the pump from floating foreign bodies, a quick coupling associated with the 15M discharge hose to cope with all configurations and its retaining cannula prevents the possible pinching of the hose when the pump is started. Finally, its 10m power supply cable is standard equipped with an electric plug.

Feel free to consult an SFA dealer who can advise you on the best model for your needs and manage the purchase and delivery of your product.

 

In conclusion, a submersible pump is a versatile and essential tool for various applications requiring water evacuation or suction. Whether for a well, pool, or emergency situation, this pump guarantees reliable and consistent performance, supported by a durable motor and appropriate evacuation capacity. Before making your choice, take the time to assess your project's specific needs to select the product that offers the best flow rate, power, and delivery suited to your usage. SFA pumps provide excellent value.