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Apr-06-98 07:06A William Henderson 612 404 2299 P. O6 <br /> F17 <br /> Gb PDPOIUTMN CP A PEAPORATM LATMAL <br /> A Dehrailne pump capadty: •�•• <br /> Gravity Distdbution *•..•� <br /> 1. Mirdmum suggmtad is 600 gallons per hour 00 Spm)to stay ahead Of <br /> water use sage. tr.w."w. `. wr. W......�+ <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 I MM ion <br /> gallants par hour(46 gpm)to prevent build-up of pressure in drop box. L 64V <br /> Pressure Distibution elm sow w• <br /> 3,a. Select number of perforated laterals <br /> b. Select perforation spacing: z het. .° `►. .w""'""..�"""' <br /> C. Subtract 2 ft from the rod;layer length. <br /> ,mrozzw2 ft.s< feet <br /> d. betirrraw the oumber of spaces between perforations. <br /> Length Pte•spacing= - ft.+ -... ft._ .... spaces > rufmmn Dtset>=x. <br /> e. spaces+1= -^pe darationaSt-wal "'ValJow 1wznwk=wa i <br /> f. Multiply perforatiotns per lateral by number Of laterals tO fi Moro i ram <br /> get total number of perforations. perforations. (1"0 <br /> 1.0a 0.56 0.74 <br /> SM EC'TM PUMP CAPACrrY C" gpm M". 2.Ob 0.80 1.04 <br /> D.Determine head requixvementm a.Use far single family homes <br /> 1. Elevation difhrencebetween pump and point of discharge. b.Use for all other applications <br /> I -feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if grsvity system,zero. <br /> feet <br /> 3. Friction lose <br /> a. Enter friction loss table with gpm and pipe diameter. Pipe 1,mgth <br /> Read friction loss in feet per 100 feet from table. Point of Dischng <br /> F.l...=,rift./100 ftof pipe ns.4D <br /> b. Detcm*w total pipe length frorn pump to discharge Etcwadat Dif ommm <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitting lose chart. Equivalent pipe <br /> length'125 tires pipe length- F-1$b <br /> x 125- 5 to ,feet <br /> C. Calculate total ftOri lass tty multiplying 1 5 inch 2.0 inch 3.0 inch <br /> FrSdim Id Pw 1001t of pipe <br /> friction loss in ft/100 k by equivalent pipe length. <br /> Total friction loss. 3, *�•x oto +100= �feet r2 C;96 0,28 <br /> 4. Total head required is the sum of elevation difference, 14 1.29 0.39 <br /> Special head requirenunts,and total friction loss. 16 1.63 0.48 <br /> 19 2.03 0.60 <br /> 20 2.47 0.73 0.11 <br /> 1 + + 25 3.73 1.11 0.16 <br /> (1) (2) (36 30 5.23 1.S5 0.23 <br /> 3S 7.40 2.06 0.30 <br /> 40 11.07 2.64 0.34 <br /> TOTAL EMAD ',t L4 feet .45 14.73 3.28 0.48 <br /> s0 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 /> gym (Step A)with at least L4L_feet of total head(Step 8). <br /> Y"t-rK. <br />