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F-17 <br /> • <br /> T) PUMP SELECTION PROCEDURE <br /> END PERFORATION Cf A PERFORATED LATERAL <br /> A Determine pump capacity: c.r cm <br /> Gravity Distribution OCt i.p.«IL a;��'' <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm) to stay ahead of _ • <br /> lq..d GnhnFomk Ir lar- <br /> water use rate. .., .`..",Sv'tar. ••Poe torr H hey-r w......N <br /> woo rod kph poor, <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,7001r it -,'11.1.1�i N�:,'"itt� '&y <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. fir,;o,,„ -A, 4...t I:•t...,. <br /> FLI[ .I Ro..L. .t <br /> • • <br /> P.rt..otle.r litDIN al <br /> Pressure Distibution Com"s..,.La.., B"° ""La1e"' <br /> 3.a. Select number of perforated laterals 3 <br /> b. Select perforation spacing= -3 feet. Z..t Saar Properly <br /> c. Sub ct 2 ft.from the rock layer length. <br /> -2 ft= ..5-...S feet. <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing= ft.+ ft.=i_2_spaces Required Perforation Discharge <br /> e. I'7 spaces+1 = I K. perforations/lateral in gallons per minute(gpm) <br /> 1. Multiply perforations per lateral by number of laterals to 1 hy Discharge 7 <br /> m.e pa. , <br /> get total number of perforations. - x t7,,,,,- .Sy perforations. Heed �2 °d`"` <br /> g. . x sPe{--,all gpm. . <br /> 1.0a 0.56 0.74 • <br /> SELEC.1 ED PUMP CAPACITY L.) (D gpm 2.Ob 0.80 1.04 <br /> B.Determine head requirements: a.Use for single family homes <br /> 1. Elevation difference between pump and point of discharge. b.Use for all other applications <br /> feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity system,zero. <br /> 5- feet <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. Pipe Length t <br /> Read friction loss in feet per 100 feet from table. Point of Discharge <br /> F.L._ �.(4 ft./100 ft of pipe ci9e <br /> b. Determine total pipe length from pump to discharge Elevation Difference <br /> point Add 25 percent to pipe length for fitting Ptunp _�,c) <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> '7 V x 1.25= ct<45 feet 1.5 inch 2.0 inch 3.0 inch <br /> c. Calculate total friction loss by multiplying gpm Fr;aim toe.per 103n of Pipe <br /> friction loss in ft/100 ft by equivalent pipe length. 10 0.69 0.20 <br /> Total friction loss= 4c'c5' x • -ld4- +100= feet 12 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, 14 1.28 0.38 <br /> special head requirements,and total friction loss. 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> 20 2.47 0.73 0.11 <br /> `e + + 'a. 25 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 5.23 1.55 0.23 <br /> 35 7.90 2.06 0.30 <br /> TOTAL HEAD I J--- feet 7 2.64 0.39 <br /> 45 14.073 3.28 0.48 <br /> 50 3.99 0.58 <br /> C. Pump selection 55 4.76 0.82 <br /> 1. A pump must be selected to deliver at least <br /> .ir yv gpm (Step A) with at least 1 J feet of total head (Step B). <br />