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Submersible pump is an equipment which is completely sealed close together to the pump body. The entire assembled device is submerged in the liquid to be pumped. The best advantage of such kind of pump is to prevent pump cavitation, a problem which is with a high elevation difference between pump and the liquid surface. Submersible pump pushes liquid to the surface as different from jet pumps having to pull liquid.Submersibles are much better than jet pumps.
Submersible pumps can be used for different applications. Single level pumps are majorly used for drainage, general industrial pumping, slurry pumping and sewage pumping. They are also known for pond filters. Multiple stage submersible pumps are typically lowered down a borehole and used for water abstraction, water wells and in oil wells.
The type of submersible pump are sump pumps and sewage pumps. These pumps types are more known with residential users. However, these pump can be used in a number of other applications such as fountain pumps,borehole pumps and well pumps.
There are numerous advantages of a submersible pump. First, it has been self-primed as the substance it is pumping is usually water, is right there at the pump itself. Further, the submersible pump may actually have to do less work than a standard pump simply because it is closer to the liquid being pumped.
There are some disadvantages to submersible pumps as well. There is the chance the pump will become corroded and lose its seals, thus allowing liquid to penetrate into the motor housing and causing substantial damage to the unit.
How to Select a Submersible Pump
When choosing a pump, consider factors such as flow rate, pressure requirements, application and power source to find the right unit to meet your needs.
1 Consider where the pump will be used. Submersible pumps are available in two basic designs, including well and sump varieties.
2 Determine the pressure requirements for your pump. The pressure of a submersible pump is also known as head or lift. It is measured as the vertical distance from the pump to the highest point of discharge.
3 Evaluate the flow rate. Every pump is rated for a certain flow rate, which indicates how much water the pump can move per minute or per hour.
4 Decide whether your pump will need to handle only liquids, or both liquids and solids. According to the Environmental Equipment and Supply Company, those who will need to drain some solid materials should look for a sewage ejector or sludge pump. Those looking to drain only liquid with no solid particles mixed in will need a simple sump pump.
5. Think about how your pump will be powered. Submersible pumps can be powered using AC or DC power, and some can even be hooked up to a generator.
6. Look for pumps with an automatic power switch option. Pumps equipped with this switch will run automatically once they are submerged, and will stop running when there is no more water to pump. This feature helps keep the motor from burning out, and is very convenient for pumps that are difficult to access.