Laserfiche WebLink
F-17 <br /> PUMP SELECTION PROCEDURE <br /> END PERFORATION Of A PERFORATED LATERAL <br /> A. Determine pump capacity: &W C_ <br /> Gravity Distribution ,....,, <br /> 1. Minimum suggested is 600 gallons per hour(10 m)to stay ahead of <br /> Water use Tate. <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 ��^R}61s..H..,�ar,s." <br /> �tiw�... t« <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. 1 I: Etta- <br /> gallons <br /> �«�u,« <br /> Pw%,WI.N L�tin at <br /> Pressure DLstibution Cieft Sow RAV• ei""" "' <br /> 3.a. Select number of perforated laterals 3 <br /> b. Select perforation spacing=,�_feet. �P%"" L„'"""' <br /> C. Subtract 2 ft.from the rock layer length. <br /> 14-el�um 610-2 ft.- feet. <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing=_ML ft.+ --t, ,ft.= z spaces Requymd pa fos,tion Dom, e <br /> e. )3 spaces+1=_ V perforations/lateral h+8Bons per n-Ante <br /> f. Multiply perforations per lateral by number of laterals to1 f y 41 A 'H.'.adr'a ;2 1646 Patti mo PW <br /> get total number of perforations. 1tl-" x -�,= L � perforations.In Ll til <br /> g. x °'` -U-spnL 1.0a 0.56 0.74 <br /> SELEC TED PUMP CAPACITY 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 /> 4 feet <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. Point of Discharge <br /> F.L._ ), j� ft./100 ft of pipe <br /> b. Determine total pipe length from pump to discharge Elevation Diffemncel <br /> point. Add 25 percent to pipe length for fitting ]P=p g3 <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> - e?O _x 1.25= q 15! feet 1gpM .5 inch 2.0 inch 3.0 inch <br /> c. Calculate total friction loss by multiplying Friuk iI=va 100n,fPipc <br /> friction loss in ft/100 ft by equivalen pipe length. 10 <br /> Total friction loss- )_x_�+100=�_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 /> q + 6, +�_ 25 3.73 1.11 0.16 <br /> (1) (2) (3c) 30. 5.23 1.59._. 0.23 <br /> 35 7.90 2.06 0.30 <br /> 40 11.07 2.64 0.39 <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 /> 3 _gpm (Step A) with at least Y feet of total head(Step B). <br />