Hand Pump is a mechanical Pump which withdraw the ground water from tube well. Hand Pump is operated by Human Power.
Components Of Hand Pump :-
Principle of Hand Pump:-
When the piston of the pump moves upwards,
the piston valve closes and a vacuum is created below the piston valve; Piston
valve causes water to be drawn into the cylinder through the foot valve, which
Simultaneously, water above the piston, held up by the closed piston
valve, is displaced upwards.
In a suction hand pump water flows outward through
the delivery outlet; in a hand pump with a submerged cylinder, it is forced up
the rising main.
When the piston moves downwards in hand pump, the foot valve
closes to prevent back flow of water, and the piston valve opens to allowing the
piston to move down through the water in the cylinder.