How to calculate pressure to choose water pump

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han2

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hi..

can anyone help me to calculate total pressure for this irrigation design to choose suitable water pump.

thanks..
pump calculation.png
 

Valveman

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You need 35-55 LPH per head at 1.5 to 3 bar pressure. You need to know the throw of the heads at 1.5 to 3 bar pressure for spacing. The heads are probably 35 LPH at 1.5 bar and 55 LPH at 3 bar for your calculations.
 
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