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PUMP SELECTION PROM <br /> A. Determine pump capacity: <br /> Gravity Distribution <br /> 1. Minimum suggested is 20 gpm <br /> 2... Maximum suggested is 45 gpm <br /> Pressure Distibution <br /> 3.a. Select number of perforated laterals 3 Perforation Discharges in GPM <br /> b. Select perforation spacing= 3 feet. Head Perforation diameter <br /> C. Subtract 2 ft.from the rock layer length. feet inches <br /> ,-,Z> -2 ft._ `7 feet. 7/32 1/4 <br /> Rods layer length <br /> d. Determine the number of spaces between perforations. 1.0a 056 0.74 <br /> Length perf.spacing= 11 1K ft.+ '3 1 ft._ /(- spaces 1.5 0.69 0.90 <br /> e. 16 spaces+1 =7 perforationsAateral 2.ob 0.80 1.04 <br /> f. Multiply perforations per lateral by-number of laterals to a Use 1.0 foot single homes. <br /> get total number of perforations. s x __ss'_perforations. b Use 2.0 feet for anything else. <br /> g• x fi ` _ "& gpm. <br /> SELECTED PUMP CAPACITY 36' gpm <br /> B.Determine head requirements: Soil treatment system <br /> 1. Elevation difference between pump and point of discharge. <br /> 8 <br /> feet Total pipe length <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity system,zero. <br /> S feet Elevation Difference <br /> t <br /> 3. Friction loss .______ <br /> a. Enter friction loss table with gpm and pipe diameter. •••••••••••••••• ------------------------------------- <br /> Read <br /> __. _ _ __________ <br /> Read friction loss in feet per 100 feet from table(F-14). <br /> F.L._ ;Z.G L/ ft./100 ft of pipe <br /> b. Determine total pipe length from pump to discharge Friction Loss in Plastic Pipe <br /> point. Estimate by adding 25 percent to pipe length for fitting Nominal <br /> loss,or use a fitting loss chart(F-15_feet). pipe dia. <br /> Equivalent pipe length-1.25 times pipe length= Flow Rate <br /> 30, x i.25= 3S feet gpm 1.5" 2„ 3" <br /> c. Calculate total friction loss by multiplying <br /> friction loss in ft/100 ft by equivalent pipe length. 20 2.47 0.73 0.11 <br /> Total friction loss= 3$ x a'�N +100=_I feet 25 3.73 1.11 0.16 <br /> 4. Total head required is the sum of elevation difference, 30 5.23 1.55 0.23 <br /> 35 6.96 2A 0.30 <br /> special head requirements,and total friction loss. 40 8.912.64 0.39 <br /> + + 50 13.46 3.99 058 <br /> (1) (2) (3c) 55 4.76 0.70 <br /> 60 5.60 0.82 <br /> 65 6.48 0.95 <br /> TOTAL DEAD H flet 1 70 1 7.44 1.09 <br /> C. Pump selection <br /> 1. A pump must be selected to'deliver at least <br /> 31� gpm (Step A)with at least 1 y fit of tdW head(Step B). <br />