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PUMP SELECTION PROCGDURC <br /> A. Determine pump capacity: <br /> Gravity Distribution <br /> l. Minimum suggested is 20 gpm !� <br /> 2 Maximum suggested is 45 gpm Pedontion Discharges in GPM <br /> Pressure Distibution Head Perforalion diameter <br /> feet inches <br /> 3. a. Select number of perforated lateral� ��3z ��4 <br /> b. 5elect perforation spacing = feet. t.oa o.sb o.�4 <br /> c. Subtract 2 ft.from the rock layer length. �.5 0.69 0.90 <br /> N.r A layet IenRlh <br /> -2 ft.= feet. Z-ob ��� t.oa <br /> d. Uetermine the number of spaces bekween perforations. a Use t.o tcx,�s�ngle h�,mes. <br /> Length perf.spacing= ft. = ft. = spaces b Use 20 feet for anvth�ng else. <br /> r spaces+1 = perforations/lateral <br /> (. Multiply perforations per lateral by number of laterals to <br /> get total number of perforations. a�_ x �,�e�= perforations. <br /> fi ,s X����= gpm. <br /> SELECTED PUMP CAPACITY��gpm <br /> B. Determine head requirements: <br /> 1. Elevation diEference betwee i�ump and point of discharge. <br /> feet <br /> 2. lf pumping to a pressure distribution system,fi��e feet for pressure �d trratment s�•strm <br /> required at manifold if gravity s stem,zera a•ao•oa•Q. <br /> �_feet Toial qpe IenRU� <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. �„�e �,���� <br /> _ Read friction loss in feet per 100 feet from table(F-14). P'� <br /> F.L.= 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 •) Sg feet). <br /> Equivalent pipe length- 125 times i length= <br /> ►?��,�x 1.2s-�fe�t Friction Loss in Plastic Pi e <br /> c. Calculate total friction loss by multiplying P <br /> friction loss in ft/100 ft by equivalent pipe length. Nominal <br /> Total friction loss= l!y 3 x \��S_+100= 3• � pipe dia. <br /> feet <br /> 4. Total head required is the sum of elevation difference, Flow Rate 1.5" 2" 3" <br /> special head requirements,and total friction loss. �m <br /> 16 + � + � 2S 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 5.23 1•55__ 0.23 <br /> 35 6.96 2.06 0.30 <br /> TOTAL HEAD �� feet � 8.91 2.64 0.39 <br /> -- - 45 I1.07 328 0.48 <br /> 5(1 13.46 39y 0.58 <br /> C. Pump selection 55 a.�c� o.�o <br /> 60 S.GU 0.82 <br /> 65 6.4K Q.95 <br /> 70 7.4�i ].09 <br /> 1. A pump must be selecte o deliver at least <br /> Z � gpm (Step A) with at least �feet of total head (Step B). <br /> t <br />