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• <br /> PUMP SELECTION PROCEDURE <br /> A. Determine pump capacity: . <br /> CGravity Distribution ENO PERFORATION OF A PERFORATED LATERAL. <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of Grew re.er <br /> water use rate. *" Topsail0 <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 « :,:,........ .,. .„ a; ,., <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. .. layer a c. lu.Fabric t..tea. <br /> Leorny Sana fora `YrA ler••0°4«sMa.teo.w•d. <br /> 5:..�.i., •erre nor reel.papas) <br /> ` 7 <br /> •i r'. • ° i M 104 P n rented Herirentaq <br /> Pressure Distribution <br /> 3. a. Select number ofperforated laterals / •:, Phil -• N Leat 12•le Edea <br /> ;�Ot0 Fl.id R -• el Roca layer <br /> . b. Select perforation spacing= = . ,-` ft. �t'' Perforations Located at <br /> C. Subtract 2 ft.from the rock layer length. cl•a•sand lana Reliant el Latera <br /> .-17 -2 ft.= L/ r ft. :.. r <br /> RodcVyerLng+l, •04191.01 Sell Properly Scarified <br /> Relent Plod.1 Send Layer <br /> d. Determine the number of spaces between perforations. <br /> Length pert.spacing= '-' ft.+ "• ft.= • .- spaces TABLE OF PERFORATION DISCHARGES IN CPM <br /> • e. spaces+ 1 = . pertorations/Iateral <br /> f. Multiply perforations per lateral by number of laterals to i kad Perforation diameter(Inches) <br /> get total number of perforations. r,, t/ <br /> .a x ped./l.t.n)= perforations. <br /> 1.0a ' 0.56 0.74 <br /> .- 1.5 0.69 0.90 <br /> g. e x a = ) gpm. 2.0b 0.80. 1.04 <br /> 2.5 0.89 1.17 <br /> SELECTED PUMP CAPACITY ) "Z .0 0.98 1.28 <br /> gpm 44.0 1.13 1.47 <br /> 5.0 1.26 1.65 <br /> B.Determine head requirements: aUse 1.0 foot of head for residential systems. <br /> ( 1. Elevation difference between pump and point of discharge. bUsc 2.0 feet of head for other establishments <br /> (.' feet <br /> `: 2. If pumping to a pressure distribution system,add five feet for pressure <br /> required at manifold <br /> 7• feet <br /> 3. Friction loss ) Pipe Length r <br /> a. Enter friction loss table with gpm and pipe diameter. Point of Discharge <br /> Read friction loss in feet per 100 feet from table. '0' <br /> • F.L.= . '74 ft./100 ft of pipe Elevation Difference . <br /> b. Determine total pipe length from pump to discharge • Pump "1", . <br /> point. Add 25 percent to pipe length for fitting . <br /> loss,or use a fitting loss chart. Equivalent pipe F-18b <br /> length-1.25 times pipe length= _. 1.5 inch 2.0 inch 3:0 inch <br /> 1'z-, x 1.25= /b feet gpm Friaia►)aaaper 100Ro[pips <br /> c. Calculate total friction loss by multiplying 10 0.69 0.20 <br /> friction loss in ft/100 ft by equivalent pipe length. ` 12 0.96 028 <br /> Total friction loss= •3 1:5" x / ./ +.100= I feet 14 1.28 0.38 <br /> 4. Total head required is the sum of elevation difference, 18 2.03 060 <br /> special head requirements,and total friction loss. 20 2.47 0.73 0.11 <br /> 25 3.73 1.11 0.16 <br /> - r 30 5.23 1.55 023 <br /> v + - + • 35 7.90 2.06 0.30 <br /> (1) (2) (3c) • - 40 11.07 2.64 0.39 <br /> 45 14.73 3.28 0.48 <br /> ; ' TOTAL HEAD 1 ) feet 50 3.99 0.58 ' <br /> 55 4.76 0.70 <br /> 60 5.60 0.82 <br /> / C. Pump selection <br /> .. 1..A pump must be selected to deliver at least ► , gpm (Step A) <br /> with at least 1 ) feet of total head (Step B). <br />