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SYSTEM ~RAULIC CALCULATI0,N,~ <br /> <br />STATIC HEAD: <br />(vertical elevation difference from the pump <br />base to the pressure distribution laterals) <br /> <br />, f0' feet <br /> <br />SYSTE~ ALLOWANCE: <br />(includes distribution piping losses and a 5 foot <br />residual head at discharge of distribution piping) <br /> <br />~Q? ~eet <br /> <br />FRICTION HEAD LOSS: <br />(transport pipe friction loss from flow rate) <br /> <br />(a) <br /> <br />CALCULATE FLOW RATE: <br />Diameter of orifices = _1/8 · inch <br />Number of orifices (N) = 42 <br />orifice Discharge Rate (R) = _.~! {see over) <br /> <br />N x R <br /> <br />Flow Rate (Gallons per Minute) <br /> <br />$2 x ,~1 = __1~ GPM <br />(N) <br /> <br />CALCULATE FRICTION LOSS: <br />Length of transport pipe (L) = <br />Friction loss coefficient (F) = <br /> <br /> . 7~ feet <br /> ~/~"__ ( see over) <br /> <br /> L × F = Friction Head loss in feet <br />100 <br /> <br />(L/~00) <br /> <br />~. feet <br /> <br />TOTAL DYNAMIC HEAD: <br />(sum of static head, system allowance <br />and friction head) <br /> <br />~FEET <br /> <br />H.~DRAULIC~PECIFICATIQNS: ~0. ~ <br /> <br />PUMp DUTY: 77.22 GPM @ ~ TDH <br /> <br />~RAND: $o~ $~=2n£zs~ S£~a£ Sump p=~ ( Grundfos <br /> <br />~ODEL: ~ .~00 ..; ~ORSE~OWER: <br /> <br />CAPACITY: ~0.. ] TDH ~ ~ GPM, and <br /> ~ GPM ~ ~3'" .TDH <br /> <br />*In the absence of specific head loss calculations, use ~O feet. <br /> <br /> <br />