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i �� � <br /> PUMP SELECTTON PROCEDURE <br /> A. Determine pump capacitq: <br /> Gravitq DistribuHon <br /> 1. Minimum suggested 3s 20 gpm <br /> 2. MAxiIIlum Suggested is 45 gpm Patoratlon Dt�d►srga in GPM <br /> Presaure Distibation k�ee p��� <br /> 3.a. Select number of perforated laterals 3 7 32 t a <br /> b. Select perfontion spacing=�_fee� t.a o.sb' a�a <br /> c. Subtract 2 ft.hom the rock layer ler►gth. �s o.69 0.90 <br /> ���-2ft.= � feet • <br /> 2ob o.so i.oa <br /> d. Determine the number of spaces between perforations. a uae�.o foot s3ngie homa. <br /> Le�gth perf,spacutg a�ft.+ ,c�ft,_.�,�,spaces b Uae 20 feet Eor anything dae. <br /> e. J�spaces+1=. � �L paforations/lateral <br /> f. Multiply perforations per lateral by number of laterals to r!y��a_ <br /> g, '�t total n�of�orations. � x . `�= 4 z-perforatlona. <br /> Z x ��= m. <br /> SELECTED PUMP CAPACTTY . 31_gpm <br /> B.Determine head requiremenb: <br /> 1. Elevation difference between puanp and point of discharge. <br /> I -1 feet <br /> 2. If pumping to a pressure distribution system,Eive feet for pressure <br /> sou a+Nmwu,y.em, <br /> required at mazufold if gravity system,zero. ��� <br /> �feet ""''a��'" <br /> 3. Friction loss <br /> a Enter friction loss table with gpm and pipe diaateter. o„„K,,,� <br /> Read friction loss in feet per 100 feet from table(F-14). �`�' <br /> ------- .. . <br /> F.L: /, � f�/100 ft of pipe � <br /> b. Deternline total pipe length irom pump to discharge ..................................... �}' <br /> point Estimate by addir►g ZS percent to pipe length for fitting <br /> loss,or use a fitting loss chart(F-15 feet). <br /> Equivalent pipe len 1.25 times pipe length= . • <br /> ��x 1.25= J/ � feet Friction Loss in Plastic Pi e <br /> c. Calculate total friction loss by muldplying <br /> friction loss in h/100 h by equivalent pipe length. NOII�� <br /> Total friction loss= /, (. x //�i +100 a�_feet pipe dia. <br /> 4. Total head required is the sum of elevation difference, �O� iS" 2" 3" <br /> special head requirements,ar►d total friction loss. � <br /> 20 247 0.73 0.11 <br /> �_+ s + �- 2S 3.73 1.11 0.16 <br /> ' (1) (2) (3c) 30 5.?3 1S5 0.23 <br /> 35 6.96 206 0.30 <br /> TOTAL HEAD �_ftet '� 8.91 264 0.39 <br /> 45 11.07 3.28 0.48 <br /> 50 13.96 3.99 0.58 <br /> C. Puatp selection � �.76 0.�0 <br /> �o s.�o o.s2 <br /> 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> 1. A pump must be selected to deliver at least <br /> 3) gpm (Step A)with at least �feet of total hea�l (Step B). <br />