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1 <br /> :r <br /> �'n <br /> Flow per Perforation = .74 gpmJperf <br /> 39.96 gpm = 54 x .l9 qpm/perf `' <br /> 8. If the Header Pipe is connectec� to the end of the Pressure <br /> Distribution System then the calculated L•ateral Diameter is <br /> 2 inches <br /> 9. If the Header Pipe is connected to the Middle of the Pressure <br /> Distribution System then the calculated Lateral Diameter is <br /> 1.5 inches <br /> A. Pressure Distribution <br /> 1. Selected Number of Perforated Laterals: 3 <br /> 2. Perforation Spacing Set at 3 feet <br /> 3. Lateral Length is to be Centered 1 Foot from Each end of the Rock Bed <br /> 54 feet - 2 feet = 52 feet <br /> 4. Calculate Number of Spaces between Perforations <br /> Length (3) divided by Spacing (2) = Number of Spaces (4) <br /> 54 divided by 3 = 17 �paces <br /> 5. Actual Perforations is equal to Calculz�ted (4) pluw 1 <br /> 18 Perforations per Lateral = 1"I + 1 <br /> 6. Total Perforations = Perforatioris/Lateral (P5) times # ot Laterals (P1) <br /> 54 = 18 x 3 <br /> 7. Flow Rate (gpm) = Numbc�r of Perfo�at.ior.s times Flow per Perforation <br /> Flow per Per.foration = .79 gpm/perf <br /> 39.96 gpm = 54 .. .?4 gpr.:!perf <br /> MINIMUM Selected Fump Cap«city: 39. 9G gpm <br /> B. Head Requirements <br /> 1. Elevatiot� difference between pump and point of discharge <br /> 9 feet. <br /> 2. If pumping to a pressure distribution system then ADD 5 FEET <br /> If pumping to a gravity system then ADD Q FEET <br /> 5 feet <br /> 3. Friction Loss <br /> a. Friction Loss in per 1p0 feet of pipe <br /> 3.28 ft per 100 ft of ripe <br /> b. Total Pipe Lengt.h: 230 ft <br /> Equivalent Pipe Length: �87.5 ft <br /> c. Calculated Friction Loss <br /> 9 ft = 3.28 ft x 287.5 ft / 100 <br /> 9 . Totai Head = Cs'zange in r,iEvat�.on t S�eciai itiead Req. + rriction Loss <br />