A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps.
Water Pumps:
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| Submersible pumps |
A submersible pump (or sub pump, electric submersible pump (ESP)) is a device which has a hermetically sealed motor close-coupled to the pump body.
A motor whose housing and terminal box is designed so that the motor can run under water (or another allowable liquid) completely submerged at a temperature of water not above 25° C.
Centrifugal pumps :
A centrifugal pump is any pump that uses centrifugal force to create a pressure differential in a fluid, thus resulting in pumping action.
Vertical centrifugal pumps :
Vertical centrifugal pumps are also referred to as cantilever pumps. They utilize a unique shaft and bearing support configuration that allows the volute to hang in the sump while the bearings are outside of the sump. This style of pump uses no stuffing box to seal the shaft but instead utilizes a "throttle bushing". A common application for this style of pump is in a parts washer.
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| Vertical centrifugal pumps / Multistage centrifugal pumps |
Multistage centrifugal pumps:
A centrifugal pump containing two or more impellers is called a multistage centrifugal pump. The impellers may be mounted on the same shaft or on different shafts.
For higher pressures at the outlet impellers can be connected in series. For higher flow output impellers can be connected in parallel.
Single Stage centrifugal pumps:
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| Single Stage centrifugal pumps |
Single Stage centrifugal pumps:
A single Stage centrifugal pump is defined as that portion of a centrifugal pump consisting of one impeller and its associated components.
Non self priming pump (Pressure Booster Pump) :
A centrifugal pump which is unable to evacuate and prime the suction line without external assistance. The opposite is Self-priming pump. Most centrifugal pumps are non-self-priming and require a flooded suction line.
Self priming pump :
Non self priming pump (Pressure Booster Pump) 
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| Self priming pump |
Self priming pump :
The term "self-priming pump" describes a centrifugal pump that can use an air-water mixture to reach a fully-primed pumping condition.
End suction pump :
End suction pump :
A type of centrifugal pump that has a casing with the suction coming in one end and the discharge coming out the top. They are almost always single stage pumps, that is, they have only one impeller.
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| End suction pump |
End suction pumps are the most common configuration for centrifugal pumps, and the least expensive configuration in many cases. A huge variation of sizes, materials of construction and designs are offered by manufacturers to handle everything from water at ambient temperature to high pressure and high temperature viscous oils, abrasive slurries, and corrosive chemicals.
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| Open well submersible pump |
Open well submersible pump :
An open well submersible pump can installed to bring the water to the surface.
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| Solar Pumps |
(Solar pump) A solar-powered pump is a pump running on electricity generated by photovoltaic panels or the thermal energy available from collected sunlight as opposed to grid electricity or diesel run water pumps.
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