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FROM : RYS PHONE NO. 4422091 Jul. 02 2003 09:19RM P8 <br /> 9 <br /> PUMP SEL)=C.TION PLQ EUURE <br /> q.. Determine pump capacity: <br /> Gravity Distribution <br /> 1. Minimum suggested is 20 gpm <br /> 2. Maximum suggested is 45 gpm Perforation Discharges in GPM <br /> Head Perforation diameter <br /> Pressure Distibution feet inches <br /> 3.a. Select number of perforated laterals 7/32 1/4 <br /> b. Select perforation spacing= feet- 1.02 0.56 0.74 <br /> C. Subtract 2 ft.from the rock layer length. 1.5 0.69 0.90 <br /> Rvdc layer ialth <br /> -2 ft.= feet. 2.0b 0.80 1.04 <br /> d. Determine the number of spaces between perforations. a Use 1.0 foot single homes_ <br /> Length perf.spacing= ft.r ft.= spaces b Use 2.0 feet for anything else. <br /> e. _spaces+1= perforations/lateral <br /> f- Multiply perforations per lateral by number of laterals to <br /> get total number of perforations- T.-=err x w;, ,«�= perforations. <br /> g. xa--gpm. <br /> SELECTED PUMP CAPACITY gpm <br /> B.Determine head requirements: <br /> 1. Elevation difference between ump and point of discharge- <br /> feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure Soil amunerd.,ph.. <br /> required at manifold if gravity s stern,zero. <br /> feet TOWa pipe 1'sei <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. ,;„ <br /> Read friction loss in feet per 100 feet from table(F-14). pipe <br /> F.L.= •d ft-/100 ft of pipe .-............. . <br /> b. Determine total pipe length from pump to discharge - - -- - <br /> point Estimate by adding 25 percent to pipe length for fitting <br /> loss,or use a fitting loss chart(F-15 feet). <br /> Equivalent pipe 1 -1.25 t_ 1 -9'f length- <br /> x 1.25= Friction Loss in Plastic Pipe <br /> c. Calculate total friction loss by multiplying <br /> friction loss in ft/100 ft,�bY'equiva ipe length Nominal <br /> .,� <br /> Total friction loss= � p x -100=_-feet pipe dia. <br /> Flow Rate <br /> 4. Total head required is the sum of elevation difference, gpm 1-5" 2" 3" <br /> special head requirements,and total:friction loss. <br /> 20 2.47 0.73 0.11 <br /> 3 Z + {� _ 25 3.73 1.11 0.16 <br /> (Y) (2) (30 5.23 0.23 <br /> 6.% eW 0.30 <br /> 40 8.91 0.39. <br /> TOTAL HEAD feet 45 11.07 3.28 0.48 <br /> 50 13.46 3.99 0.58 <br /> G Pump selection 60 5.60 0.8702 <br /> 822 <br /> 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> 1. A pump must be selecte <br /> to deliver at least <br /> gpm (Step A) with at least feet of total head (Step B). <br />