Fluid Mechanics
Foot valves are provided in the suction line of a centrifugal pump to

Remove the contaminant present in the liquid
Avoid priming, every time we start the pump
Minimise the fluctuation in discharge
Control the liquid discharge

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Fluid Mechanics
A differential pressure cell is used for

Remote recording of pressure difference
Measuring small pressure difference in liquids
Measuring the difference of the impact & the static pressure
Measuring small pressure difference in gases

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