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Jan 06 98 10: 12a Windsor Companies Corp. 482-0607 p. 7 <br /> F-17 <br /> Th <br /> PUMP SELECTION PROCEDURE <br /> 040 PERFORATION OF • PERFORATED LATERAL <br /> A.. Determine pump capacity. <br /> Gravity Distribution <br /> erdou <br /> I. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of .+P.'... T <br /> water use rate. i.e..Lee,,,. .. <br /> 4rnr.rnr1 <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 i',-z^--.•---�..ta ,,,,...„„q.,.,,,, <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. <br /> Pressure Dtstibution P••••••••1••••,wa« ., <br /> Com.Sari Lever ..'w r""".. <br /> 3.a. Select number of perforated laterals <br /> b. Select perforation spacing= .3 feet if..,,.mt la_ r..,.,,,r,,,,, <br /> c. Subtract 2 ft from the rock layer length. °"�"r"'`"`^" <br /> Rasa,5,�,-2ft = ')-c feet. <br /> d. Determine the number of spaces between perforations. <br /> Length pert'.spacing- 'i c ft.*. z ft.= i spaces <br /> Required Pvfocanon <br /> e. a.y spaces+ 1 = 1' perforations/lateral n gallons cns PminuteDischarge(gprn <br /> f. Multiply perforations per lateral by number of laterals to 9h Dluxazg. <br /> get total number of perforations. L.-7,-T--„,. x �= '7S perforations. ( I ~'"' ; in."...I <br /> g. -2 x -4..=-9-s�>aPm- <br /> SEL£t_1>=U PUMP CAPACITY 4gpm1.Oa 0.56 0.74 <br /> 2.Ob 0.80 1.04 <br /> B.Determine head requirements: <br /> ]• Elevation difference between pump and point of discharge. a. Use for single family homes <br /> feet b.Use for all other applications <br /> 2. If pumping to a pressure distribution system,five feet for pressure ` <br /> required at manifold if gravity system,zero. <br /> A" 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. i <br /> F.1.. = 3.0 ft./100 ft of pipe Point of Discharge <br /> b. Determine total pipe length from pump to discharge iyvc <br /> point. Add 2.5pipe length percent to for fitting Elevation DiFicrcncci <br /> Reno /00.c <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length- 1.25 times pipe length= <br /> D x 1.25 = a{ feet F-18b <br /> c. Calculate total fiction loss by multiplying 1.5 inch 2.0 inch 3.0 inch <br /> friction loss in ft/100 ft by equivalent length. ` �""°"t°`per 700 n°`Inca <br /> Total friction loss= 3. t7 x a t .41 00= 1 feet 10 0.69 0.20 <br /> 4. Total head required is the sum of elevation difference, 12 14 1.28 0.28 <br /> 0.38 <br /> special head requirrmeitts,and total friction loss. 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> S + 5-- + / 20 24725 3.73 0.731.11 0.1: <br /> 0.16 <br /> (1) (2) (3c) 30 5.2.3 1.55 0.23 <br /> 35 7.90 2.06 0.30 . <br /> TOTAL HEAD // feet 40 11.07 2.64 0.39 <br /> q5 14.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> C. Pump selection 55 4.76 0.70 <br /> 60 5-60 0.82 <br /> 1. A pump must be selected to deliver at least <br /> -,/ . Ll�gpm (Step A) with at least , 11 feet of total head (Step B). <br />