# What will happen if the speed of the centrifugal pump doubles, keeping other parameters the same?

What happens if we increase the speed or rather double it, keeping the other parameters constant? This is what will happen:

It is governed by the Affinity Laws (Laws of Similitude)

Flow ( Q ) is directly proportional to the ratio of the speed

Head ( m ) is directly proportional to the square of the ratio of the speed

Power required is directly  proportional to the cube of the ratio of the speed

Eg.  If flow and head is 10 m^3/hr and 10 m @ 1450 rpm respectively

Then @ 2900 rpm the flow shall be 20 m^3/hr and head shall be 40 m.

Hence, increasing the speed of water pumps or doubling it without a proper understanding of the consequences that it will have on the pressure and flow of the pump can lead to the entire system to fail.

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