Page 56 - Pressure 10 class

Working mechanism of water pump

Water pump work in two conditions. They are Upstroke and Down stroke.

Down stroke: When we pull the handle up, the piston moves down, the pressure inside the barrel

increases and the Piston Valve(V1) opens while Foot Valve(V2) closes. At this time, the water
inside the barrel below the piston moves up through Piston Valve. This is called down stroke.

Upstroke: When we push the handle down, the piston moves up, the pressure inside the barrel
decreases and the Piston Valve(V1) closes and Foot Valve(V2) opens. At this time, the water

collected above the piston comes out through the outlet. Similarly, the underground water
comes up inside the barrel through the foot valve. This is called up stroke.

In this way water pump works.

Piston
Valve(V1)

Foot
Valve(V2)

July 30, 2020 Taranath Baral/GC Shiba/Suraj Thapaliya 56