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A. Determine pump capacity: <br />Gravity Distribudon <br />1. Minimum suggested is 600 gallons per hour (10 gpm) to stay ahead of <br />water use rate. <br />2. Maximum suggested for delivery to a drop box of a home system is 2,700 <br />gallons per hour (45 gpm) to prevent bulld..lp of pressure in drop box. <br />Pressure Distribution <br />3. a. Select number nf perforated laterals <br />b. Select perforation spacing = ft. <br />c. Subtract 2 ft. from the rock layer length. <br />1Z - 2 ft. = ft. <br />d. Determine the number of spaces between perforations. <br />Length perf. spacing = c, ft. + - • ft. = ? -- spaces <br />e. ') spaces + 1= = perforations/lateral <br />f. Multiply perforations per lateral by number of laterals to <br />get total number of perforations. <br />Qx U 4 Ll perforations. <br />gx=1�gpm <br />SELECTED PUMP CAPACITY W-)_ gpm <br />S. Determine head requirement: <br />Elevation difference between pump and paint of discharge. <br />�)`- (_Z feet <br />2. If pumping to a pressure distribution syste.:., idd five feet for pressure <br />required at manifold <br /><� feet <br />DO POWOMYNAI OF A PERFORATED LATERAL <br />ara cow <br />Tyrll <br />.: <br />L4yW N 6064Uw Rena for hr <br />-.� LM_V aw tars ,": �w. wow.. o...d <br />mil. 1Wi O WO"Wimp" <br />At LOWO ft* 16 Ed" <br />of ft" Loper <br />. P.N.01" Law d I <br />CI=a a.a Leperaww a1 lNo�t <br />0M .w 'r=.'�'I'.�'"'"" <br />TABLE OF PERFORATWN DWHAXES IN Q% <br />Head Perforation d4uneW Onchn) <br />1/= <br />1/• <br />lift <br />0s6 <br />0.74 <br />Is <br />OA9 <br />0.90 <br />2.0b <br />O.AO <br />lift <br />2s <br />0d9 <br />1.17 <br />3.0 <br />0." <br />129 <br />4.0 <br />1.13 <br />1.47 <br />SO <br />126 <br />1A9 <br />BUM 1 O loot of Bead for raaideatid syata.'06 <br />bU- 2-0 foal of hood for other asta 461,- <br />3. Friction loss Pipe LAm8th <br />a. Enter friction loss table with gprr. and pipe diameter. point of D <br />Read friction loss in feet per 100 feet from table. I ", 1 - <br />F.L. = 3 " (. ft./100 ft of pipe pr,.io, Diffenmm <br />b. Determine total pipe length from pump to discharge pip q�^ <br />point. Add 25 percent to pipe length for fitting <br />4. <br />loss, or use a fitting loss chart. Equivalent pipe <br />length -1.25 times pipe length at1`-10 x �'•z f =1 <br />7Q_x1.25=feet •� <br />c. Calculate total friction loss by multiplying t L <br />friction loss in ft/100 ft by equivalent pipe length. <br />Total friction loss = �, . Io x Y'r" +100 = �_ feet <br />Total head required is the sum of elevation difference, <br />special held requirements, and total friction loss. <br />(1) (2) (3c) <br />TOTAL HEAD _�_ feet <br />Pump selection <br />. A pump must be selected to deliver at least L gpm (Step A) <br />with at least �� feet of total head (Step B). <br />F-18b <br />1.5 inch 2.0 inch 3.0 inch <br />Frialaa 1a= ear 100 A of pipe <br />10 <br />0.69 <br />0.20 <br />12 <br />0.96 <br />0.28 <br />14 <br />1.28 <br />0.38 <br />16 <br />1.63 <br />0.48 <br />18 <br />2.03 <br />0.60 <br />20 <br />2.47 <br />0.73 <br />0.11 <br />25 <br />3.73 <br />1.11 <br />0.16 <br />30 <br />5.23 <br />1.55 <br />0.23 <br />35 <br />7.90 <br />2.06 <br />0.30 <br />40 <br />11.07 <br />2.64 <br />0.39 <br />45 <br />14.73 <br />3.28_ <br />0.48 <br />50 <br />3.99 <br />0.58 <br />55 <br />4.76 <br />0.70 <br />60 <br />5.60 <br />0.92 <br />