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, F-17 <br /> PUMP SELECTION PROCEDURE <br /> ENC) PERFORATION CF A PERFORATED LATERAL <br /> A. Determine pump capacity: �-wd•Cf,•r <br /> Gravity Distribution <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm) to stay ahead of -:: .oa.a <br /> - Luau!Sand La,., .cn by.'of nay o a,.ow co.w.e <br /> j-:-Lartr of Grioterts.',citric(or tax- <br /> water use rate. / . _..a rosin>op..) <br /> ? Maximum suggested for delivery to a drop box of a home system is 2,700 4g,�-,;r` ';z .o�,- ^, <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. � Pius \� . le to <br /> Dir.orn F.,e rd or \ .��o,r� or Roca Luys <br /> -Parfora,brr Luuf.o of <br /> Pressure Distibution c,..,,sib Loy., B L'"'°' • <br /> 3.a. Select number of perforated laterals ' -_, _ _ ,. <br /> b. Select perforation spacing= feet a andl.Pw saLorin'Scaified <br /> c. Subtract 2 ft_from the rock layer length. <br /> �yQ '2ft------- feet. <br /> Rock Lezegth <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 talions per minute(gpm) <br /> f. Multiply perforations per lateral by number of laterals to Discharge <br /> get total number ofperforations. 11 - - x ���u�,= perforations. Head ;_ �" ; ma <br /> (feet) <br /> g. -qtr x �r= gpm. 1 <br /> 1.0a 0.56 0.74 <br /> SELEC:i t:U PUMP CAPACITY L-4, -...<-_ gpm I,'i,- ,...' 7.Ob 0.80 1.04 <br /> B.Determine head requirements: a. Use for single family homes <br /> I. Elevation difference between pump and point of discharge. b.Use for all other applications <br /> J? 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 Oiss in feetper 100 feet fromtable. <br /> Point of Discharge <br /> F.L.= 3.� ce, ft./100 ft of pipe T <br /> b. Determine total pipe length from pump to discharge Elevation Difference <br /> point. Add 25 percent to pipe length for fitting Pump _ e7L7,0 <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> )Sb x 1.25= ) c feet <br /> c. Calculate total friction loss bymultiplying1.5 inch 2.0 inch 3.0 <br /> inch <br /> gpm friaim loss per 100 ft of pipepe <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss= ?,d ce• x 1 (<c<" =100= (- feet 10 0.96 0.28 <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 /> 20 2.47 0.73 0.11 <br /> / 'f + + C0 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 /> S <br /> 40 11.0743 2.64 0.39 <br /> TOTAL HEAD <br /> feet 45 14.733.28 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 /> L. gpm (Step A)with at least ;. feet of total head (Step B). <br />