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9 <br /> PUMP SELECTION PRl7CEDURE <br /> A. Determine pump capacity: <br /> Gravi ion -�`'----_ <br /> 1. inunum suggested is 20 gpm�, <br /> 2. Maximum suggested is 45 gpm� � <br /> Perforati�n Discharges in GPM <br /> �r <br /> Pressure Distibution Hcad Perforaticr,diameter <br /> (feeY) i:lches <br /> 3.a. Select number of perforated laterals� __ �/32 �/4 <br /> b. Select perforation spacing = fe�et. 1.oa o.56 0.74 <br /> c. Subtract�ft. from tt;e rock lay�r length. �.5 0.69 0.9� <br /> R�uy«��R�,-2 ft. = feet. <br /> 2.Ob 0.80 l.i'i4 <br /> d. Determine thc number of spaces between perforations. a L'se t.o foot single hom�s. <br /> Length perf.spacing= ft.=__.__,_.ft. = spaces b Use 2.0 feet for anythinn eise. <br /> e. spaces+ 1 = perfarations/�ai:eral <br /> f. Multipty perforations per]ateral�y nuz�iber of laterals to <br /> get total number of perforations. x = perforations. <br /> . a era 5 PCfISPC/�TF�'AT <br /> g. � x�m ���= gpm. <br /> SELECTED PLJ�IP CAPACIT'�'��gpm <br /> B.Determine head requirements: <br /> 1. Elevation difference between pump and point of discharge. <br /> _ ! .j feet <br /> 2. If pumping to a pressure distnbution system,five feet Eor pr.essure s�il����sYs��, <br /> required at manifold if gravity system,zero. °'°=•°�'a' <br /> ^ feet T°�'P��'�,Rw <br /> 3. Friction loss <br /> a. Enter frichon loss table with gpm anc!pipe diameter. �,�e . ��..a�,o;x�n�e <br /> Read friction loss in feet per 100 feet f:rom table(F-14). P'� <br /> � ------- -- - <br /> F.L. _ ` ft./100 ft of pipe ................ . <br /> b. Determine total pipe length from pusnp to discharge <br /> ------------------------------------- <br /> point. Estimate by adding 25 percent to pipe length for fitting <br /> loss,or use a fitting loss chart(F-15__�feet). <br /> Equivalent pipe length- 1.2�times pipe length= <br /> Z 7 r�'� x 1.25=_��'�f�et �°" <br /> Friction Loss in Plastie Pipe <br /> c. Calculate total fricrion loss by multiplying Norninal <br /> friction loss in ft/100 ft�y equivalent ipe length. i e dia. <br /> Total friction loss= ��_�x�,3.,��=100=____�_(_feet �P <br /> Flow Rate <br /> 4. Total head req�.iired is the sum of elevation difference, �rn ].5" 2" 3" <br /> special head requirements,and total friction loss. <br /> �� 20 2.47 0.73 0.11 <br /> + � +�� 25 3.73 1.11 0.16 <br /> (1) {2) (3c) 30 523 1.55 0.23 <br /> 35 6.9b 2.06 0.30 <br /> 8.91 U.39 <br /> TOTAL HEAD _._��feet 4,., 11.07 3.28 , 0.48 <br /> - - 13.46 . 0.5E� <br /> 55 4.76 0.7Q <br /> C. Pump selection b+� 5.bo o.s2 <br /> 65 6.48 0.95 <br /> 70 7.44 1.Q9 <br /> 1. A pump must be selected to deliver at least <br /> �gpm (Step A) with at least ��€eet of €otal head (Step B). <br />