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How Does Hand Pump Works ?

Hand Pump :-

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 :-

  • Handle
  • Pump Rod
  • Water Outlet
  • Piston
  • Piston Valve
  • Foot Valve
  • Rising Main
  • Suction Lift

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 opens.


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.


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