Laserfiche WebLink
F-17 <br /> PUMP SELECTION PROCEDURE <br /> - END PERFORATION OF A PERFORATOO IATERAI. <br /> A. Determine pump capacity: u•..•. <br /> Gravity Distribution r.Mw <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of <br /> '' LAI"S"Iwo '.,t�wr«o.h"ff Fans 1.p..- <br /> water use rate. Mdi►w�" ") sw w�M <br /> • MA ran M1 <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 ,«-, W up Nomm"" <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. � „W <br /> of F Lao""a <br /> Pressure Distibution u,.,,.d,w,. ''""«"+«a <br /> 3.a. Select number of perforated laterals <br /> b. Select perforation spacing= feet. <br /> affm ram�Mawr <br /> C. Subtract 2 ft.from the rock layer length. <br /> R-k 1q-6%*-2ft.= feet. <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing= ft.+ ft.= spaces Required Perforabon Ducharee <br /> e. spaces+1 = perforations/lateral in 8flons Per nunute igpn <br /> f. Multiply perforations per lateral by number of laterals toM1Db �ge N'&P" <br /> get total number of perforations. =,a. x = perforations. deet) N <br /> g- -VM x�PaN gpm. 1.0a 0.56 0.74 <br /> SELECTED PUMP CAPACITY gpm 2.Ob 0.80 1.04 <br /> B.Determine head requirementu a. Use for single family homes <br /> 1. Elevation difference be nl,mp and point of discharge. b.Use for all other applications <br /> 7T J Lept <br /> v <br /> 2. if pumping to a pressure distribuuvn system,five feet for pressure <br /> required at manifold if gravity s tem,zero. <br /> _5 feet <br /> 3. Friction loss /Q - <br /> a. Enter friction loss table with gpm and pipe diameter. Q �Pe L gth <br /> Read friction loss in feet per 100 feet from table. 2 Point pischr8e <br /> F.L.= Z.6 ft./100 ft of pipe <br /> b. Determine total pipe length from pump to dischargeElevackm Differmce <br /> point. Add 25 percent to pipe length for fitting Pomp r <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= <br /> F-18b <br /> `ea x 1.25=_L�5 feet 1.5 inch 2.0 inch 3.0 inch <br /> c. Calculate total friction loss by multiplying Spm FrXUWlow pa 100AofFPO <br /> friction loss in h/100 ft by equivalent pipe length. 10 0.69 0.20 <br /> Total friction loss= /Z-5 x +100= 3. 3 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 /> S ,15- + + 3_3 20 2.47 0.73 0.11 <br /> 25 3.73 1.11 0.16 <br /> (1) (2) (30 30 5.23 1.55 0.23 <br /> AL71.0 0.30 <br /> 7 ji <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 /> qd gpm (Step A) with at least 12 _feet of total head(Step B). <br />