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• • PUMP SELECTION PR�CEDL�E � • <br /> r� A. Determine gump capacity: <br /> �` Gravity Diatribution . <br /> 1. Minimum suggested is 20 gpm <br /> 2. Maximum suggeabed ia 45 gpm • <br /> Pressure Distibudon <br /> 3.a. Select number of perEorated Iaterals ' per�oratto�,ptK�ga�n GPM <br /> b. SeleCt pErfOldti041 spa�tLg s f!!�. �d Perfora�umeter <br /> C. $tibtr3Ct 2 f!.fiOaL�1�!tOCjC�3j►eI kit�L. <br /> �ay.r�u,-Z ft.s feet. 7 32 I 4 <br /> d. Deterrmule the number of apaces betweat pesforatlo�s. i.oa o.sb o.�a <br /> L.ength pErf.8p3Citlg s ft.� �,s �uq 1S 0.69 0.90 <br /> e. spaces+1= � perforations/lattral 2.ob o.so i.oa <br /> f. Multiply perforatio�ns ger lsteral by nuanbes of labesela to a Use 1.o foot single homes. <br /> get total number of perforationa.�T x .�s �pn�p�, b UK 2.0 feet for anych;ng else. <br /> 8• penr X�m s Sp� <br /> SELEC'I'�D PUMp CAppC11y 3 � gpm ' <br /> B.Determine head requireaaents; ' ��1 M��n+ent syslem <br /> 1. Elevation clifference betweei►pump and poiat of diecharge. o••�"�a• <br /> � het row pjw�«�n <br /> 2. I�pumping to a press}u�e distrlbutlaai syatea�,Hve feet for preasure <br /> required at maaifold if gravity s trac�,zeib. . � ' <br /> ,S'�' �� . . � ' Ekv.aa,Dlff«wu� <br /> 3. Friction loss � . , ... , <br /> � a. Enter friction loss tabk with gpm and pipe diemeber. ......... <br /> ' Read fricHon lo�s ia feet per 100 feet h+omn table(F-14), ..........................---------- <br /> ` F.L._ �• �� h./100 h of pipe <br /> b. �etera,ine total pipe lengtll froa,pump to dbchs�ge �Friction toss in Plasfic Pipe <br /> poin� Estianate by edding 25 percent b�pipe length fos fittIng Nominal <br /> loss,or use a$tting lbas chart(F-15 feet). pipe dia. <br /> Equivaleat pipe ldtgth-1.25 tianea PiPe le�$th• � • Flow.Rate <br /> �ri.�_x 1.25'= � �y�-��_ket . �� 1.5" 2" 3�� <br /> c. Calculate total hlction loss by multlplying ' � <br /> friction losa in R/100 h by equivaknt pipe kt�gtll. � � 20 2.47 0.73 0.11 <br /> Total frictlan loss= y y �.��'_+100� a fee� ' 25 3.73 1.11 0.16 <br /> x <br /> 4. Total head requit�ed is the sum of elevatlooit di�lae � 5.23 1.55 0.23 <br /> special head t+cquireanettb,aad t�al fsk�iost loY.. . . � �. 6.96 2.06 0.30 <br /> 40 8.91 2.64 0.39 <br /> 4S 11.07 328 0.48 <br /> :8 + S� + �:�� • 50 13.46 3.99 0.58 <br /> (1) (?J � . . � � 4.76 0.70 <br /> 60 5.60 0.82 <br /> � b5 • 6.48 0:95 <br /> . TOTAL HBAD �t�eet ' 70 � � 7.44 1.09 <br /> C. Pump selection . � . . <br /> L A pu�p must be �se�� `�ecbed'b��d .L':, �xti least <br /> �_gpm (Step A)wlth at least`�- ,�feet of botal head(Step B). <br /> ��. . . . <br /> � ! :.. � <br /> �� <br />