Hand pumps are manually operated pumps; they use human power and mechanical advantage to move fluids or air from one place to another.
They are widely used in every country in the world for a variety of industrial, marine, irrigation and leisure activities. I am try to explain water hand pump functions as per my vision. hope you like it.
There are many different types of hand pump available, mainly operating on a piston, diaphragm or rotary vane principle with a check valve on the entry and exit ports to the chamber operating in opposing directions.
Most hand pumps are either piston pumps or plunger pumps.Hand pumps are commonly used in developing countries for both community supply and self-supply of water and can be installed on boreholes or hand-dug wells.