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F-17 <br /> FUNO SELECTION PROCEDURE <br /> ENO PERFORATION OF A PERFORATED LATERAL <br /> A. Determine pump capacity. C_ <br /> Gravity Distribution Teww i"hl <br /> 1. Minimum suggested is 600 gallons}fpr hour(10 m)to stayahead of <br /> 00-- g r- Or ,•G,�•,`....... ��r N e»»elw Pes.lc-IW• <br /> water use rate. ►+�11r f�IMM, Yd M1w N Iw/w.Irw iwwM <br /> MI.M/MY1 Mwl) <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 hr»nlw prows llw.e.nl..1, <br /> w»w w.M rw <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. y; -Al Lww Ix•1.I <br /> H�«,,.,« <br /> Pw"mk <br /> Law"at <br /> Pressure Distibution �,..^,.,�,,,,. °'1$-«W.M <br /> 3.a. Select number of perforated laterals 3 <br /> mo <br /> b. Select perforation spacing=�_feet. 110"POMM.SOW L"", <br /> C. Subtract 2 ft.from the rock layer length. <br /> so <br /> -2ft.- yfeet. <br /> d. Determine the number of spaces between perforations. <br /> Length pert.spacing-_LJ5:�ft.+ -3 ft. tg spaces Re9uM Perforation Dtx uge <br /> e. -Lk-spaces+1- L'L perforatiomflateral b+gam+per minute(gpa,I <br /> f. Multiply perforations per lateral by number of laterals to 'huge <br /> Heed 2 ra pre i .a Pwl <br /> get total number of perforations. ;; x-1- - _ _perforations. t <br /> g. 4" xt`"`_a�L gPffL 1.0a 0.56 0.74 <br /> SELECTED PUMP CAPACITY - gpm 2.Ob 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 /> f _feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity system,zero. <br /> feet <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. Pipe Length <br /> Read friction loss in feet per 100 feet from table. Point of Discharge <br /> F.L._ 1.3 ft./100 ft of pipe 61 e <br /> b. Determine total pipe length from pump to discharge Elevation Diffcmncc <br /> point. Add 25 percent to ripe length for fitting 1PUMP q z <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length- F-18b <br /> - W D x1.25=feet <br /> c. Calculate total friction loss by multiplying 1.5 inch 2.0 inch ainch <br /> SM =,I=�=IPM too n or pipe <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss- D-2 x 5 D +100=_I feet 12 0.96 0..69 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 /> �. + + 1 25 3.73 1.11 0.16 <br /> (1) (2) (30 30 5.23 1.55 0.23 <br /> 35 7.90 2.06 0.30 <br /> W 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 /> ,�%J gpm (Step A) with at least ')j- feet of total head (Step B). <br />