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PUMP SELECTION PROCEDURE <br /> A. Determine pump capacity: _ <br /> Gravity DistributionENO PERFORATION OF A PERFORATED LATERAL <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahc:+d of -orau Cow <br /> water use rate <br /> 2. Maximum•suggested for de'livery'to a drop box of home system is 2,700 - --= <br /> ' foyer of tieeuu(te leak ter ia..:, <br /> gallons per hour(45 gpm)to prevent build-up of ressure in drop box. Leom,field layer <br /> Wile rrd ro.ie Peva) <br /> ' , er aql a '• rwlorel,e°dtlled Hdn,M+►etii <br /> Pressure Distribution .e "�°r �P r <br /> 3. a. Select number of• rforated laterals 3 '�• • "' l'°'' I A*Ease <br /> Qreln F191 Rode of nxt,lyer <br /> b. Select perforation spacing ft. P.ri.r°iia„tyce►.e et" <br /> c. Subtract 2 ft.from the rock layer length. Cleve soee Benau or leferol <br /> a 2 f t.a '�''�,f t <br /> ` - WoNal Sell Properly Scarified <br /> Before Ploc"Serd lever { l <br /> d. Determine the number of spaces between perforat ons. <br /> Length rt.spacing e= ft.+ ft.= aces <br /> g g -�'3- �- �- p TAi3LE Or mitrORATION DISC]IARCrs 1H CPM <br /> e. _M'spaces+.1 = 1-e perforations/lateral <br /> f. Multiply perforations per lateral by number of laterals to Head Perforation diameter(inches) <br /> get total nun)bcr of perforations. r t/e <br /> er. x ' R,I= perforations. <br /> 1.03 0.56 0.74 <br /> 90 <br /> g• Spar. x e _ 4 0 gpm. 1-5 0.69 <br /> o 80 1 .04 <br /> 25 0.89 1.17 <br /> SELECTED PUMP CAPACITY 4m 3.0 0.98 1.A <br /> ---Q-gyp 4.0 1.13 1.47 <br /> 5.0 1.26 1.65 <br /> B.Determine head requirements: aUse 1.0 foot of head for residential systems <br /> 1. Elevation difference between pump and point of discharge. bUse 2.0 feet of head for other establishments <br /> ) I feet <br /> 2. If pumping to a pressure distribution system,add five feet for pressure <br /> required at manifold <br /> .5" feet <br /> 3. Friction loss PiMl cngth <br /> a. Enter friction loss table with gpm and pipe diameter. Point or Discharge <br /> Read friction loss in feet per 100 feet from table. <br /> F.L= ft./100 ft of pipe ;"Fife- Elevation Difference <br /> b. Determine total pipe length from pump to discharge EIPUMIP d <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitting loss chart. Equivalent pipe F-18b <br /> length-1.25 times pipe length= 1.5 inch 2.0 inch 3.0 inch <br /> .(/6 -x 1:25= feet gTym Friction tan Pa 100 n of pipe <br /> c. Calculate total friction loss by multiplying 10 0.69 0.20 <br /> friction loss in ft/100 ft by equivalent pipe length. 12 0.96 0.28 <br /> Total friction loss= &'-S_x �.U +100 D. ,feet 14 1.28 0.38 <br /> 4. Total head required is the sum of elevation differc ice, 16 1.63 0.48 <br /> special head requirements,and total friction loss. 20 2.47 0.73 0.11 <br /> 25 3.73 1.11 0.16 7. <br /> I. + S •+ 30 5.23 1.55 '. 023 <br /> (1) (21 (3c) 35 7.90 2.06 0.30. <br /> 40 11.07 2.64. . 0.39 <br /> 45 14.73 3.28 0:48 <br /> TOTAL HEAD I feet 50 3.99 0.58 <br /> S5 4.76 0.70. <br /> r <br /> 60 5.60 0.82 <br /> C. Pump selection <br /> i. A pump must be selected to deliver at least gpm (Step A) <br /> with at least feet of total head (Step B). ,{ <br />