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PUMP SELECTION PROCEDURE <br /> A. Determine pump capacity: <br /> Gravity Distribution <br /> i. Minimum suggested is 20 gpm <br /> 2. Maximum suggested is 45 gpm Perfontion Discharges in GPM <br /> Pressure Distibution Head Perforation diameter <br /> feet inches <br /> 3. a. Select number of perforated laterals 3 �/32 i/4 <br /> b. Select perforation spacing= _' feet. 1.oa o.56 0.�4 <br /> c. Subtract 2 ft.from the rock.layer length. �.5 0.69 0.90 <br /> -2 ft.= Lc� feet. �.ob o.so i.a� <br /> x«k y r�i�„sa, . <br /> d. Determule the number of spaces between perforations. a use�.o foot single hon,es. <br /> Length perf.spacing=�ft.+�ft._ "L c� spaces b Use 2.0 feet for anything else. <br /> e. 1s2,spaces+1 =�_perforations/lateral <br /> f. Multiply perforations per lateral by nwnber of laterals to )��� ' � <br /> get total number of perforations. � x �5 T«� _ �:'� perforations. <br /> g. ��' � ` _.�..gp <br /> ,�:�x �� m. <br /> SELECTED PUMP CAPACI'TY � -L gpm <br /> B.Deteraune head requirements: <br /> 1. Elevation difference between pump and point of dischazge. <br /> '- � feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure ������^�Sr�« <br /> required at manifold if gravity system,zero. a�•:"�`a• , <br /> ���:,.., <br /> 5 feet Tota!pipe Im6th <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. w� . ��,,tia,���,tt <br /> Read friction loss in feet per 100 feet from table(F-14). P'�` <br /> F.L._ �,�), ft./100 ft of pipe �' � � � � <br /> ...............- � - <br /> b. Determuie total pipe length from pump to discharge ------------•------------------------ `-i'i�: <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 len�th 1.25 times pi e length= <br /> ': r x 1.25=�_feet Friction Loss in Plastic Pipe <br /> c. Calculate total friction loss by multiplying <br /> friction loss in ft/100 ft by equivalent pipe length. Nominai <br /> Total friction loss= �x �"i' ; +100= 1 S' feet pipe dia. <br /> 4. Total head required is the sum of elevation difference, Flow Rate 1.5" 2" 3" <br /> special head requirements,and total friction loss. �� <br /> �- i 20 2.47 0.73 0.11 <br /> �_+ S + l J 25 3.73 1.11 0.16 <br /> ' (1) (2) (3c) 30 5.23 1.55 0.23 <br /> 35 6.96 206 0.30 <br /> 40 8.91 264 0.39 <br /> TOTAL HEAD �L� feet 45 11.07 3.28 0.48 <br /> 50 13.46 3.99 0.58 <br /> C. Pump selection 60 5.60 o.s� <br /> 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> 1. A pump must be selected to deliver at least <br /> � '" gpm (Step A) with at least '�.� feet of total hea�i (Step B). <br />