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Normal flow is 100% of the flow you actually expect. Rated flow is the maximum safety factor times the normal flow.

i.e. for a maximum safety factor of 1.2

Normal flow = 100 gpm

Rated flow = 1.2*100 gpm = 120 gpm

Safety factors are applied to ensure a piece of equipment has some flexibility of operating conditions in its application.

The minimum flow is the minimum safety factor time the normal flow

i.e.

i.e. for a maximum safety factor of 0.5

Normal flow = 100 gpm

Rated flow = 0.5*100 gpm = 50 gpm

If sized properly a pump specified in this way could operate at any point between 50 and 120gpm with no problems.

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13y ago
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Wiki User

9y ago

The difference between normal flow rate and actual flow rates is the temperature and pressure at which measurements can be made. Actual flow rate measurements are made at the current temperature and pressure of the process while normal flow rate measurements are made at 101.325 kPa pressure and 0 degrees Celsius.

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9y ago

Standard flow rate is the correction applied to the actual flow measurement. This is based on measuring the temperature and pressure of the flow system.

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Q: What is the difference between normal flowrate and Actual flow rate?
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