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F-17 <br /> PUMP SELECTION PROCEDURE <br /> END PERFORATION OF A PERFORATED LATERAL <br /> A. Determine pump capacity: .----G".----G"'"G <br /> Gravity Distribution r Top.NIL 3s�' <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of g `" <br /> Lar.r saLd• 'LA.a,.rr cM/.w r.cc-w.d- <br /> - <br /> water use rate. NIrod rosin Dap.) <br /> 2. Maximum sugges - •-livery to a drop box of a home system is 2,700 �acT-■ �_• z.t«6I-o•l l.a k..,=aalpl. <br /> !r."` M»Cap War Top <br /> gallons per h. (45 gpm) . prevent build-up of pressure in drop box. PI. -.,Leel le to Edge <br /> ••on field of Rock Loy. <br /> Prteratlar Located al <br /> Pressure Distibution c»ae sd.d LD>< Bottom of Lat•ro1 <br /> 3.a. Select number of perforated laterals <br /> b. Select perforation spacing= -- - feet. 'Woes.Sall Property swtt»d <br /> Bolero Placed Saw Layer <br /> c. Subtract 2 ft.from the rock layer length. <br /> - -2"ft.= feet. <br /> Rock Layer LoyAk <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing= --ft.-+----- ft.= spaces Required Perforation Discharge <br /> e. spaces+1 = perforations/lateral in gallons per minute(gpm) <br /> f. Multiply perforations per lateral by number of laterals to Discharge 7 <br /> Head /Z etch pelf and perf <br /> get total number of perforations. �,�:1. x pens -=- - ---perforations. (feet) <br /> aleL <br /> g. .. x_ = gpm. <br /> 1.0a 0.56 0.74 <br /> SELEC:i ti)PUMP CAPACITY y gpm Al f} c 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 /> 3 0 feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity system,zero. <br /> -- feet <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. Pipe Length <br /> Read friction loss in feet per 100 feet from table. Point of Discharge <br /> F.L.= g_-2 ft./100 ft of pipe T/00 <br /> b. Determine total pipe length from pump to discharge Elevation Difference <br /> point. Add 25 percent to pipe length for fitting pump _99Z <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= <br /> D. cc) x1.25= PES feet F-18b <br /> c. Calculate total friction loss b multi 1 n 1.5 inch 2.0 inch 3.0 inch <br /> y p yt g gPM Friction loss per 100 ft of pipe <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss= 3 ,Q. I x . s44� =100= /O feet 12 0.69 0.20 <br /> �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 /> 3o + -- + /r) 20 2.47 0.73 0.11 <br /> 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 /> 40 11.07 2.64 0.39 <br /> TOTAL HEAD 0 feet 45 14.73 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 /> `4-( gpm (Step A) with at least 4 0 feet of total head (Step B). <br /> yr;l}A, <br />