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SYSTE~HY/~RA~CCALCULATION <br /> <br />STATIC t{EAD <br /> (vertical elevation difference frum the pu~p base <br />to the pressure distribution laterals) <br /> <br />SYSTEM~CE <br />(includes distribution pipir~losses and a 5 foot <br />residual head discharge at t.he distribution late/~ls} <br /> <br />FRIC~IONHF~AD <br />~tr~nsport pipe friction:loss as result of flew rate) <br /> <br />10' <br /> <br />(a) Calculate Flow Rate', <br />Diameter of orifices <br /> <br />Number of orifices = N <br />Orifice discharge rate = R (see over) <br />N X R ~ Flow Rate in gallons per ~ainute <br /> <br />(b) Calculate Friction Loss <br /> <br />Length of transpor~ pip~ <br />Friction loss coefficient <br />LXF <br /> <br />,30 m.x <br />(i/TOO ft) (F) <br /> <br />= L <br />-- ¥ (see over) <br />-- Friction Head in feet <br /> <br />TOTAL DYNAMIC HEAD <br /> (sum of static head, system allowance & <br /> friction head) <br /> <br />feet <br /> <br />* In absence of specific head loss calculations, use lO ft. factor <br /> <br />feet <br /> <br />feet <br /> <br /> <br />