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PUMP SELECTION PRO EDLmE <br /> ESD PERFORATION of a PERTORATEO I-ATEnn; <br /> A. Determine pump capacity: (1 <br /> Gravity Distribution --� <br /> 1. Minimum suggested is 600 gallon$per hour(10 gpm) to stay ahead of #-�- - <br /> F <br /> .l U.I..I., <br /> water use rate. �..�,w 1.,• Un- X. <br /> ..r l <br /> Maximum suggested for delivery to a drop box of a home system is 2,700 ;x,, <br /> gallons per hour(45 gpm) to prevent build-up of pressure in drop box. <br /> r•Y1M�1 W1.l Kq l...1 <br /> Pressure Distibution C1..,.%d"1A.. 1. <br /> a3. a. Select number of perforated laterals _r--- <br /> C b. Select perforation spacing= -3 feet. U..". <br /> U 04 C. Subtr ct 2 ft. from the rock layer length. <br /> w..t,r.. �Wl-2 ft. • (c Q, feet. <br /> d d. Determine the number of spaces between perforations. rnnLF o1'PERFORATION 1);S0 t,,rccs IN cr <br /> Length perf. spacing a�ft. + 3 ft.= a <br /> O C ' $pdCCS head .Perioratlon dumeter(Inches) <br /> fy M c. spaces+ 1 = _perforatioruJlaterai <br /> 00 IV f. Multiply perforations per lateral b number of laterals io <br /> get total numberof perforations. �3x "-� �=Ss I perforations. 1.0,._ 0 6 0.?�,- <br /> C,Cf x�> 1`� _ `)`' tri. 90 <br /> a -,,e,„ �,;�,, --gpm. 1.5 0.69 <br /> 2.0b 0.80 1.04 <br /> a SELECTED PUMPCAPACITY gpm 25 089 i 1.1; <br /> 3.0 0.98 12B <br /> 4.0 1.13 1.47 <br /> U. Determine head requirements: 5.0 116 1.65 <br /> 1. Elevation difference between pump and point of discharge. ,use 1.o root or head for residential systems. <br /> to feet bU.2.0 feet of head for other establishments <br /> if pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity system,zero. <br /> -5-, feet 11 <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe d1ameter. S'L) f)l r� PIPs Length <br /> Read friction loss in feetr 100 feet from table. <br /> lx <br /> F.L.= , yY ft./100 ft of pipe Puint of Disch..1 .._. <br /> b. Determine total pipe length from pump to discharge Elevation Ui[fcrcncc <br /> point. Add 25 percent to pipe length for fitting PurTtp <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length- 1.25 times pipe length is F-18b <br /> V 6 T x 1.25 a c c/ feet <br /> c. Calculate total friction loss by multiplying 1.5 mh 2.0 inch 3.0 inch <br /> _ 8Pm v�*tao n or pipe <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss- c4 x _ �� 10 0.69 0.20 <br /> +100= 3 - felt 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 /> L' + 5 + S `5 25 3.73 1.11 0.16 <br /> (1) (2) ( c) 30 5.23 1.55 0.23 <br /> `J 35 7.90 2.06 0.30 <br /> TOTAL HEAD f`� ?S feet 40 11.07 2.64 0.39 <br /> 45 14.73 3.28 0.48 <br /> s0 L 3 V) ' 0.58 <br /> 55 4.76 0.70 <br /> C. Pun1p selection 60 5.60 0 82 <br /> L A pump must be selected to deliver at least <br /> �� gpm (Step A) with at least LU, feet of total head (Step 13). <br />