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F-17 <br /> PUMP SELECTION PROCEDURE <br /> END PERFORATION OF A PERFORATED LATERAL <br /> A. Determine pump capacity: I Gr.Cow <br /> Gravity Distribution T"aat <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of -::L;y,,,,,C„»„,»Fe,ic t,,,,,. <br /> water use rate. t.an,saga"'.' ` "tow a"°'«"`.'`«.�'° <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 .K».ap. 70 wa cuo t or Teo <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. r,,;p�I. R«�tom.�,. <br /> Pressure Distibution Cl t SOW u» a"'°""'L WW <br /> 3.a. Select number of perforated laterals 3 <br /> b. Select perforation spacing= 't feet SOW*rMa"�Larw°N0 <br /> C. Subtract 2 ft from the rock layer length. <br /> 2 ft.=. to C, feet <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing=14L.-ft.-t-�S ft.= J spaces Required perforation pucharge <br /> spaces+1=� In_perforations/lateral gallons P�minute(gpml" <br /> f. Multiply perforations per lateral by number of laterals to �13� �ase ,,ate 34eIndy <br /> 2total number of orations._3- x ,Q,,_ �L perforations. (feee <br /> P� la.tal. <br /> g x�P'`- 1.0a 0.56 0.74 <br /> SELECTED PUMP CAPACITY acl_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 /> feet <br /> l 2. If pumping to a pressure distribution system,five feet for pressure <br /> J required at manifold if gravitystem,zero. <br /> C_feet <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. t Pipe Length , <br /> Read friction loss in feet per 100 feet from table. Point of Discharge <br /> F.L.= Q.G ft/100 ft of pipe /oaA_ <br /> b. Determine total pipe length from pump to discharge Elevation Difference <br /> point. Add 25 percent to pipe length for fitting Dpip <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> x 1.25= ! 12 feet 1.5 inch 2.0 inch 3.0 inch <br /> c. Calculate total friction loss by multiplying gpm rrtLatImPW roosofpiPc <br /> friction loss in ft/100 ft by equivalent pipe length. 10 0.69 0.20 <br /> Total friction loss= D.to x I 1 +100= Z _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 /> +�_+ 25 3.73 1.11 0.16 <br /> (1) (2) (30 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 _.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 /> J 2r gpm (Step A)with at least _J feet of total head(Step B). <br />