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Pine SELECTION PROCEDURE <br /> A. Determine pump:capacity: <br /> Gravity Distribution <br /> 1. Mmimum suggested is 20 gpm <br /> 2 Maximum suggested is 45 gpm Pe:toi tfcn Dbdw"In GPM <br /> Heid Paimdon dtia w <br /> Pressure Distibution feet clic: <br /> 3.a. Select number of perforated laterals 732 1 1 4 <br /> b. Select perforation spacing= 3 feet. Loa 0 0.94 <br /> 0.90 <br /> c. Subtract 2 ft.from the rock layer length. 2.ob 0.80 <br /> q--), -2 ft._ YQ feet. ' <br /> PA&°r'kng* l <br /> se1.0foot dooms. <br /> d. Determine the number of spaces between perforations. a U <br /> b Use to feet for le hOWeg else. <br /> Length perf.spacing=W ft.+Z ft._ � spaces <br /> e. :io spaces+1= perforations/lateral <br /> f. Multiply perforations per lateral by number of laterals to <br /> get total number of perforations. x . _ ` perforations. <br /> g. X _-ftj gpm. <br /> SELECTED PUMP CAPACITY T 47 . gpm <br /> B.Determine head requirements: <br /> 1. Elevation difference between pump and point of discharge. <br /> a► feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure sou°"`°'"""'"� <br /> required at manifold if gravity system,zero. <br /> _ 7bd s feet pipe ' <br /> 3. Friction loss <br /> L Enter friction loss table with gpm and pipe diameter. o«.&n cMMW <br /> Read friction loss in feet per 100 feet from table(F-14). ao• , <br /> F.L.: • (I ft:/100 ft of pipe <br /> ................................... <br /> b. Determine total pipe length from pump to discharge <br /> point. Estimate by adding 25 percent to pipe length for fitting <br /> loss,or use a fitting loss chart(F-15_-feet). <br /> Equivalent pipe length-1.25 times pipe length= _ <br /> Li )o -x 1.25_ I;- feet Friction Loss in Plastic Pipe <br /> c. Calculate.total friction loss by multiplying Nominal <br /> friction loss in ft/100 ftby equivalent pipe length. pipe dia. <br /> Total friction loss= 7 . x a +100: `� feet How Rate 15" r 3- <br /> 4. Total head required is the sum of elevation difference, gpm <br /> special head requirements,and total friction loss. <br /> 20 2.47 0.73 0.11 . <br /> ,_a 1 +,�_+ 1__ 25 3.73 1.11 0.16 <br /> (1) (?) (3c) <br /> 30 .5.23 1.55 0.23 <br /> TOTAL HEAD . y feet 4455 107 32.28 048 <br /> 50 13.46 -3.99 0.58 <br /> .55 4.76 0.70 <br /> C. Pump selection 60 5.60 0.82 <br /> 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> 1. A pump must be select.t.deliver at least` <br /> gpm .W- i(Step A). at least -,feet of total'head(Step B). <br />