A centrifugal pump is one kind of water pump, the work principle of it is increases the speed of a liquid in a pipe system by using a rotating impeller.
An impeller is built inside the pump itself and is responsible for moving the liquid into the pump. This type of pump is most commonly used in relation to a liquid pipe system and can be found in a manufacturing environment, water treatment or food procesing plat, or install in the water cooling equipment, such as water chiller.
The force behind the pump is created through the use of the rotational energy from an electric motor. As the pump impeller rotates, it creates energy that allows the liquid to be drawn toward the center of the impeller, and then forces it out again.
This pressure causes an increased pressure further downstream in the pipe, forcing the liquid to flow. An impeller is just like a propeller, but without the blades.
In order to slow down the flow of a liquid, resistance must be created. When the centrifugal pump casing catches the liquid and controls the flow, it slows down the kinetic energy and converts it into pressure energy.
It is important to remember that the pressure is a measurement of the flows resistance and is not create by the pump.