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PU.%1P 5ELC•CTiQV I'ILOCCI��-Kl{ <br />A. Determine pump capacity: <br />Gravity Distribution <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 2,7(X) <br />gallons per hour (45 gpm) to prevent build-up of pressure in drop box. <br />Pressure Distribution <br />3. a. Select number of perforated laterals _ <br />b. Select perforation spacing = ft. <br />c. Subtract 2 ft. from the rock layer length. <br />111<wp11 - 2 ft. = ft. <br />d. Determine the number of spaces between perforations. <br />Length perf. spacing = 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 />1MMT. x«.I= perforations. <br />g P./. x a_T� =- gpm. <br />SELECTED PUMP CAPACITY Z V gpm <br />B. Determine head requirements: <br />1. Elevation difference between pump and point of discharge. <br />D feet <br />2. If pumping to a pressure distribution system, add five feet for pressure <br />required at manifold s <br />feet <br />3. Friction loss <br />a. Enter friction loss table with gpm and pipe diameter. <br />Read friction loss in feet per 1(l(1 feet from table. <br />F.L. _ , 73 _ ft./100 ft of pipe <br />b. Determine total pipe length from pump to discharge <br />point. Add 25 percent to pipe length for fitting <br />loss, or use a fitting loss chart. Equivalent pipe <br />length - 1.25 times pipe length _- <br />SC xl.25= /00 feet <br />c. Calculate total friction loss by multiplying <br />friction loss in ft/100 ft by equivalent pipe length. <br />Total friction loss = 1GV x r 13 +1(11) = r 72 feet <br />0. Total head required is the sum of elevation difference, <br />special head requirements, and total friction loss. <br />+-.S- _+ <br />(1) (2) (30 <br />TOTAL HEAD feet <br />C. Pump selection <br />1. A pump must be selected to deliver at least Zo gpm (Step A) <br />with at least LL_ feet of total head (Step BY <br />END PERFORATION OF ♦ PERFORATED LATERAL <br />,-w.« C«« <br />L"ro at War..trl" r"&rtc to toa• <br />• L.arar S"n" LAW � �-era. I.M M tie • Ww cww« <br />�✓.rhw0.1 � �alfrnl�� �- �I1 �r~COY 1�prM jM 11q.IM ro11r <br />Al LOW 12'41 Wp <br />i Orae_f yi0•Ih.r,."�' •- _�. : at 1ta.■ LOW <br />.l • P"r Iw"b.ro Lncat« as <br />Clan sons Lars aallaw a Lalrro <br />�- Or1a�w1 Sail hanart, Scarrl�« <br />stror. MI"c" San" LOW <br />TABLE OF PERFORATION DISCI IARCFS IN CI'M <br />Head Perfuratimi diameter (inches) <br />r/u l/. <br />1.0a <br />0.56 0.74 <br />is <br />0.69 0.90 <br />2.Ob <br />0.80 1.04 <br />2.5 <br />0.89 I 1.17 <br />3.0 <br />0.98 1.29 <br />4.0 <br />1.13 1.47 <br />I <br />5.0 <br />1.26 1.65 <br />&Use <br />1.0 foot of head for residential systems. <br />bUse 2.0 feet of head for other establishments <br />Pipe Lcn81h <br />Point of I <br />D <br />E--Elevation Difference <br />Pump <br />F•18b <br />1.5 inch 2.0 inch 3.0 inch <br />SPnt rricua& low per I00 ft of pipe <br />10 <br />0.69 <br />0.20 <br />12 <br />0.96 <br />0.29 <br />14 <br />1.28 <br />0.38 <br />16 <br />1.63 <br />0.49 <br />18 <br />2.03 <br />0.60 <br />20 <br />2.47 <br />0.11 <br />1.11 <br />25 <br />3.73 <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 />0.82 <br />