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♦ <br /> F-17 <br /> PUMP SELECITON PItOCEDURE <br /> Efn PERFORATION OF A PERFORATED LATEFG� <br /> A. Determine pump capaaty: We.�... <br /> Gravity Distribution T,,,,,,, <br /> 1. Minimum suggested is 600 gallons per hour(]0 gpm) to stay ahead of _ . <br /> •�p�Y o/(seoN�IW FCbK(u'tui- <br /> � LsM7 SQW IOM� Y�U b1� 1 Iq d�Ire�cww�0 <br /> water use rate. }}�.�.�,.a,,..,,�.., <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 .. . ����a����«�_«��_��� <br /> Inlo CAO Ira TOD <br /> gallons per hour(45 gpm)to prer•ent build-up of pressure in drop box. �,,.�,,„ _u �.,., ,Z•„�,�, <br /> a F41a of R«a 1.or�r <br /> � Prloratlon lncofM at <br /> Pressure Distibution ����.. B°„^^�^'�°'.�^' <br /> 3.a. Select number of perforated laterals_�_ <br /> onvn.ei soi� ar.o.nr svin.e <br /> b. Select perforation spacing= y.S feet �,,d,P,�„��„��„„ <br /> c. Subtract 2 ft from the rock]aver length. <br /> ��-2ft.=�Zfeet <br /> d. Det rnune the number of spaces bet�veen perforations. <br /> I.ength perf.spacing=�Z ft.+��ft._�1�spaces Required Perforation Discharge <br /> e. �Q_spaces+ 1 = a L perforations/lateral in gallons pa minute(gpm) <br /> f. Multiply perforations per lateral bv number of laterals to �J3� D��ge � � <br /> L Head ;Z m �' y �d�+ <br /> get tatal number of perforations.,,� x �,����c„_��perforations. �feeq <br /> �� � X'-�,�-�_�gPm. <br /> 1.Oa 0.74 <br /> SELECTED PUMP CAPACITY�_gpm 2.�b 0.8� 1.�4 <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 /> /O feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifoid if gravitv system,zero. <br /> � ;�e! <br /> 3. Fricnon loss ^� <br /> a. Enter friction loss table�vith gpm and pipe diameter. Pipe Lengch <br /> Read friction loss in feet per 100 feet from table. � Point of Ducharge <br /> F.L. = 3•�. ft./100 ft of pipe �,y�, <br /> b. Determine total piPe length from pump to discharge Elevacion Difference <br /> point. Add 25 percent to pipe length for fitting �P ,�n� <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.?5 times pipe length= <br /> I 7 c� x 1.25 = a l'� feet F-18b <br /> C. CalCulate total friCtion loss b multi 1 n 1.5 inch 2.0 inch 3.0 inch <br /> }� p}� g g� Friaim losa pv]00 h o(oipc <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss= �l 3 x ;Z.,b +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 1.28 038 <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 /> � 25 3.73 1.11 0.16 <br /> �.� �..� �,_� Zn c�; j Sc � n�: i <br /> ' � i <br /> TOTAL I��D �2 , - ' i�. 1� <br /> �_feet 45 14.73 3.28 0.48 <br /> -- 0.58 <br /> I <br /> C. Pump selection bo s:bo o:s2 I <br /> 1. A pump must be selected to deliver at least <br /> _�gpm (Step A) with at least a�feet of total head (Step B). <br />