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i <br /> I <br /> F-17 <br /> I <br /> I <br /> PUMP SELECTION PROCEDURE <br /> END PERFORATION OF A PERFORATED LATERAL <br /> A. Determine pump capacity: C.--C <br /> Gravity Distribution reo.w, <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of _ <br /> �O�f al C-fm N FoWic(w ft- <br /> water <br /> - <br /> water use rate. `WIC'Sam LOW -YI()1'°'-""°'"" ` " '.. <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 ��^����Hw mWfy <br /> into Coo N w To <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. �,,•P„" L.,., ,2•,0 „- <br /> FW._ of RI LI <br /> cpw <br /> Pressure Distibution Coven 5eM u>* 8.1 Berw «.w�N Le1-1 �� <br /> we� - <br /> 3.a. Select number of perforated laterals1 <br /> b. Select perforation spacing= _feet. `0"0 nal$eo s"1N0 <br /> 60w Pk o 4 S&W Low <br /> C. Subtratc�2 ft.from the rock layer length. <br /> -2 ft._. U to feet. <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing= ft.+ ft._ :Z Q, spaces Required Perforation Discharge <br /> e. ? spaces+1=�3 perforations/lateral ,n gallons per minute(gpm) <br /> f. Multiply perforations per lateral by number of laterals to �Smper e Ah� <br /> t total number of perforations._,,S .. x �PulL. _ _perforations. (Ease) %ii m ,° <br /> g_ x P'`_ �� 1.0a 0.56 0.74 <br /> SELECTED PUMP CAPACITY 20 gpm 2.Ob 0.80 1.04 <br /> B.Determine head requirements: a.Use for single family homes <br /> 1. Elevation difference betweenpump and point of discharge. b.Use for all other applications <br /> �_feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity item,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 Dischar-ge <br /> F.L._ ';?. (n ft./100 ft of pipe /cDy <br /> b. Determine total pipe length from pump to discharge Elevation Difference <br /> point. Add 25 percent to pipe length for fitting Pum <br /> P 0 <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> �0 0 -x 1.25= 0.5_ feet 1.5 inch 2.0 inch 3.0 inch <br /> c. Calculate total friction loss by multiplying 9PM Friaim IM W 1008 of Pipe <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss= Z.(o x ').�� +100- feet 10 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 /> 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 /> 3_gpm (Step A)with at least 19 feet of total head(Step B). <br /> i <br /> �I <br />