Laserfiche WebLink
4. F-17 <br /> ? <br /> FUMY SELECTION PROCEDURE <br /> ENO PERFORATION OF A PERFORATED LATERAL <br /> A. Determine pump capacity: mow-�». <br /> Gravity Distribution <br /> TpoW ,e„ <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm) to stay ahead of - c»�„w FeL K I, ,,,, <br /> Water use rate. •loony S d Laver boy..4 of fy•....=." <br /> ,w��� <br /> •woo M.o.Y.o.o..l <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 -.rr-i... ►•*%.tom^a,, .-....o f <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. .%A.,.,„, ----Alol Loom Ca,. <br /> �,. <br /> Por/Mellon Leu1w II <br /> Pressure Distibution Clean sand taper °i""r L."' <br /> 3.a. Select number of perforated laterals 3 _ <br /> b. Select perforation spacing= 3 feet. r; S"' """"�""° <br /> PMd.y S..d L.,.. <br /> c. Subtract 2 ft.from the rock layer length. <br /> Rock -2ft.= ')3 feet. <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing= ft.+�_ft.= spaces Required Perforation Discharge <br /> e. 14 spaces+ 1 = 1 S perforations/lateral in gallons per minute(gpm) <br /> f. Multiply perforations per lateral by number f laterals to 9i3. , D•s rge 7Z�ap,,, i Ind,pert <br /> ,÷1. <br /> get total number of perforations. x p,- rQ,,= ')S perforations. (feet) <br /> g. xsgpav,..4 gpm. 1.Oa 0.56 0.74 <br /> SELEC:1 EU PUMP CAPACITY 4 a gpm 2.Ob 0.80 1.04 <br /> B.Determine head requirements: a. Use for single family homes <br /> I. Elevation difference between pump and point of discharge. b. Use for all other applications <br /> S 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 feetr 100 feet from table. <br /> Pe Point of Discharge <br /> F.L.= 3.0 ft./100 ft of pipe i4')o <br /> b. Determine total pipe length from pump to discharge Elevation Difference <br /> point. Add 25 percent to pipe length for fitting pump /vvs <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> aO x1.25 = a-,' feet <br /> c. Calculate total friction loss b multi 1 n 1.5 inch 2.0 inch 3.0 inch <br /> Y P Y' g Pm Friaioe loss per 1Do n of pipe <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> 10 0.69 0.20 <br /> Total friction loss= 3. 0 x S +100= ) feet 12 0.96 0.28 <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 /> J + S� + / 25 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 5.23 1.55 0.23 <br /> 35 7.90 2.06 0.30 <br /> 40 11.07 2.64 0.39 <br /> TOTAL HEAD 1/ 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 /> ._.�' L+)__g.pm (Step A) with at least // feet of total head (Step B). <br />