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F-17 <br /> PUMP SELECTION PROCEDURE <br /> EMO PERFORATION OF A PERFORATED LATERAL <br /> A. Determine pump capacity: /r..o.°, <br /> Gravity Distribution ' t TyyooYl 1 <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of - <br /> Water use rate. • <br /> .Loenr <br /> S. tar« ' .--.�'°°1 pm i, !a. <br /> .yl' <br /> • wilt.n0 rosinrosinO.paper)) <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 ,: 00 wrar"7r � � i <br /> .■ - � :Vii-1,y----4 <br /> To <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. P„„ ,_u Loy 12'to Edge <br /> ' - • TO FYk of a«.LONE <br /> ;... . • <br /> Pressure Distibution S3- 2- Sl:3=11 c1°e1 sa.e u,, g.'09Tof Lyoy`yi" <br /> 3.a. Select number of perforated laterals 3 (.11-P. --t. - T X' n <br /> b. Select perforation spacing= 3 feet. 1i -1... ` a'•3: .9 `on,..1 S°° •.o;^•Seeroliod <br /> Pismo S0.9 Lop. <br /> c. Subtract 2 ft.from the rock layer length. (oa 4s <br /> -2 ft.= feet. <br /> d. Det rrmine the number of spaces between perforations. <br /> Length pert.spacing= -ft.+ ft.= --spaces Required Perforation Discharge <br /> e. -spaces+1= perforations/lateral I I in gallons per minute(gpm) <br /> f. Multiply perforations per lateral by number of laterals to 7f ZA "D)A Discharge ��ma <br /> get total number of perforations. ,.°„I A 7 m,=L, ee <br /> „perforations. Hd 4 6+6 r"` <br /> g. sxs. �gpm. <br /> �`- 1.0a 64-.56 , 0.74 <br /> 0.74 <br /> SELECTED PUMP CAPACITY Is( 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)o feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity system,zero. <br /> S 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. <br /> e <br /> F.L.= a.t2 t, ft./100 ft of pipe Point of D""argc <br /> b. Determine total pipe length from pump to discharge Elevation Difference' <br /> point. Add 25 percent to pipe length for fitting Pump ers3 <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> 1 x 1.25= ) C ) feet <br /> c. Calculate total friction loss b lti 1 n 1.5 inch 2.0 inch 3.0 inch <br /> Y muP Yl g gpm Friction loss a,100 s of Pia <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss= a.0 10 x i SD +100= 3 feet 10 0.69 0.20 <br /> 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 /> (o + .Si + 3 25 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 5.23 1.55 0.23 <br /> - _ --7.90___ 2.057 030 <br /> 40 11.07 2.64 0.39 <br /> TOTAL HEAD 'D-9 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 /> 3.. gpm (Step A)with at least a9 feet of total head (Step B). <br />