Water pumps are mechanical
or electromechanical devices that are designed to move water through pipes or
hoses by creating a pressure differential. The two most common types of pumps
used for pumping water are centrifugal pumps and positive displacement pumps. Centrifugal
pumps, as their name implies, makes use of centrifugal force to take water that
enters an impeller and uses the rotational energy generated from spinning that
impeller to produce hydrodynamic energy.
Positive
displacement pumps use a piston, plunger, diaphragm, or a rotating cog or gear
to mechanically move a fixed volume of fluid repeatedly through the pump
chamber. Positive displacement pumps can move water at the same speed
notwithstanding the inlet pressure, which centrifugal pumps cannot do.
