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F-17 <br /> t <br /> FUNe SELECTION PROCEDURE <br /> END PERFORATION OF A PERFORATED LATERAL <br /> A. Determine pump capacity: Gr- <br /> Corer <br /> Gravity Distribution + T....0 <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of :��,a f.e.nW rw.l.f. <br /> water use rate. ••.ID.•,s�Lift. -W5 MI. 1 .W n...w <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 r I ...m tl...t <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. .:.,I.A.. -AI I 1:•t.c.a. <br /> MIO ' . R•••LCp <br /> P.l vi.n.LD.Dt.d.I <br /> Pressure Distibution • CM..s,„„„I.r. Sweet«L.t«.1 <br /> 3.a. Select number of perforated laterals 3 <br /> b. Select perforation spacing= feet. � issified <br /> ...,..P e"„ LeTer <br /> c. Subtract 2 ft.from the rock layer length. <br /> �la��-2ft = 53 feet. <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing=t ft.+ ft.=1'_spaces Required Perforation Discharge <br /> e. 1'1 spaces+1= 1 to perforations/lateral in gallons per minute(gpm) <br /> f. Multiply perforations per lateral b number of laterals to 1)y Discharge <br /> Head i aR,, ,i <br /> inch poi <br /> get total number of perforations. la.d. x Pmt`uc+iS 1 perforations. ee ` <br /> m. <br /> g. x429.. <br /> 1.0a _ (0.56 ) 0.74 • <br /> SELECT 60 PUMP CAPACITY 4 O 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 /> l feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity system,zero. <br /> - S feet . <br /> 3. Friction loss •• <br /> a. Enter friction loss table with gpm and pipe diameter. Pipe Length <br /> I I <br /> Read friction loss in feet per 100 feet from table. Point of Discharge <br /> F.L._ :1.1•`-1 ft/100 ft of pipe T'3S11 <br /> b. Determine total pipe length from pump to discharge Elevation Difference <br /> point. Add 25 percent to pipe length for fitting Pump _`3, <br /> loss,or use a fitting loss chart. Equivalent pipe '91R <br /> length-1.25 times pipe length= F-18b <br /> 35- x 1.25= 2,, t./ feet <br /> c. Calculate total friction loss by1.5 inch 2.0 inch 3.0 <br /> inch <br /> gpPm >T;a;Q1law PQ,aonorP;ata <br /> friction loss in ft/100 ft by equivalent pipe length. 10 0.69 0.20 <br /> Total friction loss= a./,,Li x a9y +100= i 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 /> ____L.2....--+ .. + 4S 25 3.73 1.11 0.16 <br /> (1) (2)' (3c) 30 5.23 1.55 0.23 <br /> __ 7.90__ _ Q ) 0.30 <br /> 40 11.07 2.64 0.39 <br /> TOTAL HEAD a•-,) feet 45 14.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> C. Pump selection 60 5.60 0.82 <br /> 1. A pump must be selected to deliver at least <br /> NO gpm (Step A) with at least a.' feet of total head (Step B). <br />