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F-17 <br /> EMR SELECTION PROCEDURE <br /> DO PERFORATION OF A PERFORATED LATERAL <br /> A. Determine pump capacity: 4"M`'"' <br /> Gravity Distribution T»" <br /> 1. Minimum suggested is 600 gallons per hour 00 gpm)to stay ahead ofty; <br /> ,•;:... .f CommonF.wk(«It- <br /> Water use rate. tA�►S"� Wmin mome') ~ <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 w low I" <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. y; a� le •_« <br /> :.:,•::.. . ... <br /> • r.r+«wiw L'M'W"l <br /> Pressure Distibution ". Clem fM{Iw <br /> 3.a. Select number of perforated laterals 3 <br /> b. Select perforation spacing=�_feet. ���� <br /> c. Subtract 2 ft.from the rock layer length. <br /> -2 ft._ _c� feet. <br /> Iw <br /> d. Determine the number of spaces between perforations. <br /> Length pert,spacing=,$ ft.+,y3 ft. 1) spaces Rpulred Perforation <br /> e. _l)spaces+1=_ perforations/lateral Por II1t""t`� <br /> f. Multiply perforations per lateral by number of laterals to (ly� Head a X32 rare y. pwf <br /> get total number of perforations..,,,. x <a,,= perforations. (tem <br /> g' ` x Poll_ gym' 1.0a 0.56 0.74 <br /> SELECTED PUUT CAPACrrY L+o gpm 2.0b 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 /> CI - feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity s tem,zero. <br /> feet <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm.and pipe diameter. Pips Length <br /> Read friction loss in feet per 100 feet from table: Point of Discharge <br /> F.L._�: ft./100 ft of pipe Cr <br /> b. Determine total pipe length from pump to discharge Elevation Difference <br /> point. Add 25 percent to pipe length for fitting jPWnP <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length- F-18b <br /> _ � _x 1.25= Sa feet 1.5 inch 2.0 inch 3.0 inch <br /> c. Calculate total friction loss by multiplying gpm r,kdm las PW aDoa of Pipe <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss- -A,Ly x <D +100=_ - 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) (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 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 /> LJD gpm (Step A)with at least _L� _,feet of total head(Step B). <br />