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� � � ' <br /> ' � PL�SEi -CTION PROCfiDURE � <br /> A. Determine puatp;capsdtp: . <br /> Gravity Diatdbution: : . <br /> 1. M'utialum auggested is 20 gpm 8-��'' � ��3 �.3.0 - 3� <br /> 2 Maximuat suggested is 45 gpm r�4�,�a �� -��3s=?� raforadon �a crHs <br /> Head Faforatlon diameter ' <br /> Pre�aure Diatibntioa � � <br /> 3.a. Select nuanber of perforated laterals,_ � � <br /> b. Select perforation apacing�_feeG �.w o.sb' 0.74 <br /> c. Subtract 2 it fioal the rociclayer length. 2�ob o.�80 1.�0� <br /> ,ea��.ri.wn*'2 it:,_,_feet ' <br /> d Determine the nuanber of spaces between perforutlons. a U,��.o toot�ng1e hoena. <br /> �� ���a�g: f t.+�ft�s apaces b Uie 2A leet t�aaythlrg else. <br /> e. _apaas+1■...__perforadona/ktenl� <br /> f. Multiply perfotations per latetal by s�umber of lttterals to 713a�' <br /> get total aualber of perforattons.� x �'�ay Perfondons.� w�-�s� <br /> g, � X�: � gpm. <br /> SELECTED PUMP CAPACTTY,�_gpai <br /> B.Detera�ine hesd requireate.nbs <br /> 1. Elevation difference betweena ualpfaad point of discharge. <br /> -�--1-- sou d..�� <br /> �. If pumping to a pressure distribution aystmn,five feet for prrssure . ��a <br /> required at muiifold if grs►vi�feet�� <br /> ���� <br /> 3. Friction losa <br /> a. Enter friction loss table with gpm utd pipe diaaneter. • r�.r.�►aer.�.�. <br /> Read friction loas in feet per 100 feet from table(R-14). a�' ,,,,,,, , <br /> F.L=.��._h./100 R of pipe . , �� � <br /> b. Detesa�e total pipe leagth from puatp to discharge <br /> .................................... <br /> poiat Eatiau�te by adding?S percant to pipe length for fitt�ig <br /> loss,or uae s Htting loaa chart(F-15__�eet). <br /> Equivalent pipe len -1.25 times pipe lengtl�_ . • . <br /> x 1.25=-��feet Friction Loss in Plastit Pi e � <br /> c. Calcukte.total friction loss by atultiplying <br /> hktion loas in ft/100 ft by equivalmt pipe lalgth. N� <br /> a► +1p0,. 1) feet P P� <br /> Total irlctioa loss• �` X�.5�. - Flow Rate <br /> 4. Total head required is the sual of devatton differeace, �� iS" 2" 3" <br /> spedal head requirements,uid total friction loss. <br /> 20 247 0.73 0.11 . <br /> �_,_,)_+�_+ �� 25 3.73 1.11 0.16 <br /> . (1) (2) (3c) � .6.5 9 210 0.0 <br /> 40 8.91 264 0.39 <br /> 'TOTAL HBAD ,�.Z feet 45 11.07 3.28 0.48 <br /> � 50 13.46 3.99 0.58 <br /> • .55 4.76 0.70 <br /> C. Pump selection �o . 5.�0 o.e2 <br /> 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> •• 7,�r, :.�. ` ', <br /> 1, p pump mu,st,be selected�to deliver�at least` � . <br /> _�,gpm (Step A).wrth?at least `�j feet of total�head(Step B). <br /> A <br />