A water reservoir is on a hill and a main dispersal pipe splits into several paprallel secondary pipes which have Are the total head losses in all the pipes equal to the head loss in one of the secondary pipes?There's nothing "classically parallel" there. 
Take your flowrates Motorized Valve Actuators in each segment starting with the far right one, calculate head loss and add them up all the way back to the reservoir.  You'll have different discharge pressures at the end of each "parallel" segment required to hold the flowrate you want at each outlet. Suggest you invest in AFT's Fathom. This is the software that PSIM was derived from. Or you employ a consultant to do the analysis for you.

MORE NEWS