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PUMP SELECnON PROCEDURE <br />A. Determine pump capacity: <br />C' Gravity Distribution <br />1. Minimum suggested is 600 gallons per hour (10 gpm) to stay ahead of <br />water use rate. <br />2. Maximum suggested for delivery to a drop box of a home system is 2,700 <br />gallons per hour (45 gpm) to prevent build-up of pressure in drop box. <br />Pressure Distribution <br />3. a. Select number of perforated laterals .? <br />b. Select perforation spacing : i ft. <br />c. Subtra 2 ft. from the rock layer length. <br />11� - 2 ft • � [t. <br />d. Determine the number of spaces between perforations. <br />Length pert. spacing . /, L., ft + ft. _ 2 -7,_ spaces <br />e. _�'i!= spaces + 1 �_ perforations/lateral <br />f. Multiply perforations per lateral by number of laterals to <br />get total number of perforations. <br />1=. x A �_ &-j, perforations. <br />g' a x Q��= &ZBPm <br />SELEIL I ED PUMP CAPAQTY 3� gpm <br />V. Determine head requirements: <br />1. Elevation difference between pump and point of discharge. <br />):Z_ feet <br />2. If pumping to a pressure distribution system, add five feet for pressure <br />required at manifold <br />�. feet <br />3. Friction loss <br />a. Enter friction loss table with gpm and pipe diameter. <br />Read friction loss in feet per 100 feet from table. <br />F.L a :i . L ft./100 ft of pipe <br />b. Determine total pipe length from pump to discharge <br />point. Add 25 percent to pipe length foi fitting <br />loss, or use a fitting loss chart. Equivalent pipe <br />length - 1.25 times pipe length = <br />11 �_ x1.25- Z) 1C/ feet <br />c. Calculate total friction loss by multiplying <br />friction loss in ft/100 ft by equivalent pipe length. <br />Total friction loss = N . L. x t ✓ +100 = _ ( feet <br />4. Total head required is the sum of elevation difference, <br />special head requirements, and total friction loss. <br />+ S, + L� <br />(1) (u (30 <br />TOTAL HEAD _-) "_ feet <br />C Pump selection <br />1. A pump must be selected to deliver at least Z_ gpm (Step A) <br />with at least �_ feet of total head (Step B). <br />EM PERFORATION OF A PERFORATED LATERAL <br />«� c... <br />TyW <br />.• ; lww .t wMar. rWk I. I. <br />M7rw NM IMr.w�Mf <br />• w Ir,e tM <br />Ir N CAP <br />_ <br />LAWN <br />.4�. ralraivalwue N <br />i - Greer tow L"W W4. of La"M <br />carr ... ta..ul.e <br />TABLE OF PERFORA noN DtSCHARCEs IN CPM <br />Head Paloration dlraudw 0ndwl <br />10 <br />7/0 <br />148 <br />lam <br />036 <br />0.74 <br />is <br />069 <br />0.90 <br />26b <br />OJO <br />1 X01 <br />23 <br />029 <br />1.17 <br />30 <br />0.98 <br />120 <br />4.0 <br />1.13 <br />1A7 <br />510 <br />126 <br />165 <br />au" 1.0 foot of herd for nm1&ntW 2ysleena. <br />blhe 2.0 !«t of had far o1l+a aalAbtLF�+rn4 <br />Pipe LAmph <br />Point of DischarS <br />)elevation Difrem-me <br />Pump p n � <br />F -18b <br />1.5 inch 2.0 inch 3.0 inch <br />BPM Rlaimkup.IOonerr4+ <br />10 <br />0.69 <br />0.20 <br />12 <br />0.96 <br />0.28 <br />14 <br />1.28 <br />0.38 <br />16 <br />1.63 <br />0.48 <br />18 <br />2.03 <br />0.6u <br />20 <br />2.47 <br />0.73 <br />0.11 <br />25 <br />3.73 <br />1.11 <br />0.16 <br />30 <br />5.23 <br />1.55 <br />0.23 <br />35 <br />7.90 <br />2.06 <br />C.30 <br />40 <br />11.07 <br />2.64 <br />0.39 <br />45 <br />14.73 <br />3.26 <br />0.48 <br />so <br />3.99 <br />0.58 <br />55 <br />4.76 <br />0.70 <br />60 <br />5.60 <br />0.82 <br />