Centrifugal pump systems tutorial by Chaurette J.

By Chaurette J.

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Calculate the total head The total head is the sum of the static head (remember that the static head can be positive or negative) and the friction head. 5. Select the pump You can select the pump based on the pump manufacturer’s catalogue information using the total head and flow required as well as suitability to the application. Example of total head calculation - Sizing a pump for a home owner application Experience tells me that to fill a bath up in a reasonable amount of time, a flow rate of 10 gpm is required.

If you take a straw, fill it with water, cover one end with your fingertip and turn it upside down you will notice that the liquid does not come out of the straw, try it!. The liquid by being pulled downward by gravity creates a low pressure under our fingertip. The liquid is maintained in balance because the low pressure and the weight of the liquid is exactly balanced by the force of atmospheric pressure that is directed upwards. The same phenomenon occurs in the pump suction which is pulling up liquid from a low source.

5 m/s velocity  Copyright Fluide Design Inc. 45 FRICTION HEAD LOSS FOR VARIOUS FLOW RATES  Copyright Fluide Design Inc. 46 FRICTION HEAD LOSS FOR VARIOUS FLOW RATES  Copyright Fluide Design Inc. 47 FRICTION HEAD LOSS FOR VARIOUS FLOW RATES  Copyright Fluide Design Inc. 48 PIPE FRICTION HEAD LOSS FOR VARIOUS FLOW RATES  Copyright Fluide Design Inc. 49 FRICTION HEAD LOSS FOR VARIOUS FLOW RATES  Copyright Fluide Design Inc. 50 APPENDIX B Formulas and an example of how to do pipe friction calculations  Copyright Fluide Design Inc.

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