Laserfiche WebLink
am t F-17 <br /> I <br /> PUMP SELECTION PROCEDURE <br /> END PERFORATION OFA PERFORATED LATERAL <br /> A. Determine pump capacity: Gro-C~ <br /> Gravity Distribution ZETopeW iW <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of Ceeana. k car lav- <br /> water use rate. �.aar Sam`,aver ��'°'of <br /> a <br /> .1111 n 2 i W.paper, <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 'Pas"IF9 P;;t=tb^0,116",�R�lato <br /> I.10 Gap Noa, Toa <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ",; , ,tea:aa. <br /> of P�PWftMt 4 Locaftd at <br /> Pressure Distibution c1Mn saes Lova Bi1faiA a'Lateral <br /> 3.a. Select number of perforated laterals3 . <br /> b. Select perforation spacing=_ feet -W°IP, "^ Lot-L.I. <br /> 1 <br /> Lot- <br /> C. Sub"q 2 fL from the rock layer length. <br /> -W-2 ft._ f et <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing=Lgja ft.+�_ft.= 7--2- spaces Required Perforation Discharge <br /> e. Z.2 spaces+1=Z_perforations/lateral ,n gallons per minute(gpm) <br /> f. Multiply perforations per lateral by number of laterals to N a :.apd i� P <br /> d <br /> get total number of perforations. , x �_ * perforations. (feet) �z <br /> g. x �- gpm. 1.0a 0.56 0.74 <br /> SELECTED PUMP CAPACITY'gpm 2.0b 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 /> _�-/ -feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity s stem,zero. <br /> 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. 1 Point of Dischar�c <br /> F.L.= '1, (g fL/100 ft of pipe Tlaab j <br /> b. Determine total pipe length from pump to discharge Elevation Difference <br /> point Add 25 percent to pipe length for fitting Pump _Jp 7 J!� <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> ) 7 n x 1.25= a a feet <br /> c. Calculate total friction loss b multiplying 1.5 inch 2.0 inch ape inch <br /> y multi p N g Friaim m W100 R of pipe i <br /> friction loss in ft/100 ft by equivalent pipe length. pn 0.69 0.20 <br /> Total friction loss= a • t x 1 n-� +100= 5 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 /> 20 2.47 0.73 0.11 <br /> eL<_+�_+�� 25 3.73 1.11 0.16 <br /> (1) (2) (30 30 5.23 1.55 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`7 gpm (Step A) with at least _]�feet of total head(Step B). <br />