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 A pump is a device that moves fluids (liquids or 

gases), or sometimes slurries, by mechanical action, 

typically converted from electrical energy into 

hydraulic energy. Pumps can be classified into three 

major groups according to the method they use to move 

the fluid: direct lift, displacement, and gravity pumps.

    Pumps operate by some mechanism (typically 

reciprocating or rotary), and consume energy to perform 

mechanical work moving the fluid. Pumps operate via many 

energy sources, including manual operation, electricity, 

engines, or wind power, and come in many sizes, from 

microscopic for use in medical applications, to large 

industrial pumps.

    Mechanical pumps serve in a wide range of 

applications such as pumping water from wells, aquarium 

filtering, pond filtering and aeration, in the car 

industry for water-cooling and fuel injection, in the 

energy industry for pumping oil and natural gas or for 

operating cooling towers and other components of 

heating, ventilation and air conditioning systems. In 

the medical industry, pumps are used for biochemical 

processes in developing and manufacturing medicine, and 

as artificial replacements for body parts, in particular 

the artificial heart and penile prosthesis.

    The most commonly used pump is definitely water 

pumps, therefore there are lots of types of pumps for 

underwater usage like 

[url=http://www.lutseepumps.com/submersible-pump/]

Submersible Pump[/url], 

[url=http://www.lutseepumps.com/submersible-

pump/submersible-borehole-pump/]Submersible Borehole 

Pump[/url]and