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<br /> , PUMP SELECTION PROCEDURE �
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<br /> A. Determtne pump caQuity: �
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<br /> ��Gravlty Dtstrtbudon o� �a�►Ta� oR � �oru�o ut�uu. �
<br /> 1. Minimum suggeeted is 600 gallons per hour(10 gpm)to stay ahead of �,.,��,M„ � �
<br /> wate►use rate. � �
<br /> 2. Maxlmum suggested for delivery to a drop box of a home system is 2,700 �.�T;�i.,��' .I
<br /> ' ,' '. `f a.N.�11.h�rk(«bu .
<br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ��;'�w�,sw�.,,.► '�.�',.,.,���,,..,,.,,,,.. ,
<br /> Preuure Diatr[butlon r�"' w"w"""'"""' I
<br /> 3. a. Select number oE perforated laterals 3 , y: � � �:•�w� �
<br /> � . ... : .,�,,,.. 1
<br /> b. Setect perforaHon spacing: �, ft. ,�k..:...�. . . r«�:wi.�'�...M..�
<br /> c. Sub ct 2 ft.from the rock layer length. ��; c�..w�.,., M��.�.«u�.,r i
<br /> ���-2 f�•�ft. �:._�.,. .�:�.,... � I
<br /> � �i����� '
<br /> d. Determine the number of spaces between perforations. � �
<br /> Length perf.spacing=�ft.+,�ft._�'S spaces TABLH OF PBRFORATION D19CtURCis'4 W CPM �
<br /> e. �_spaces+i=��.L,perforations/lateral , y
<br /> ' f. MulHply perforadons per lateral by number of laterals to .tk.d Pedor.ebn d�.akea p„chesl �
<br /> �et total number of perforations. ,
<br /> �, x-�_�,perforations. ��' ���� f
<br /> � • �.a o.s6 oaT-
<br /> g. �? x .�l• s��m, 1 S 0.69 �0.90 i
<br /> �T tP� M 2.Ob O.eO 1.01 �
<br /> ' . 2s o.e9 �.» �
<br /> SELEC'FED PUMP CAPACITY 31 m 3.0 0.90 . 1.28
<br /> 8P �.o t.ta t.��
<br /> 5A 1.26 1b5
<br /> B.Determtne head requlrements: au.e�.o toot ot he�a ta re.wn,wt sy.�em.. i
<br /> l. Elevadon difference between pu p and point of discharge. ���,p����d for other atablbhmenb
<br /> `.�.: �feet ,
<br /> :2. lf pumping to a preasure distribution system,add five feet for pressure � �
<br /> required at mani�old �
<br /> • � feet � ' I
<br /> ,3. FricHon Ioss � I�pe La+��h . �
<br /> I a. Enter frlcHon loss table with gpm and pipe diameter. Point of Di�char6
<br /> ' Read friction loss in feet per 100 feet trom table. /v! ;
<br /> ' F.4 s �•(o ft./100 ft of P�Pe . 4ev�tion DiRerence I
<br /> b. Determine total pipe length from pump to discharge � p„�, 93 !
<br /> , P .
<br /> poin� Add 25 percent to pipe length for fitting . ;
<br /> loss,or uae a fitNng loss chart� Equivalent pipe F-18b '
<br /> ! length-1.25 Hmes pipe len�th= 1.S inch 2.0 inch 3.0 inch �
<br /> � (4 t7 x 1.25= 17S feet 6pm rtw��r..�oon�t�. �
<br /> : c. Calculate total friction loss by multiplying �
<br /> ' frictlon loae in ft/]00 ft by equivalent pipe length. 12 0.9�6 � 0.28 � .
<br /> , j Total f�icdon loss s • le x t� � +.100=��feet 14 1.28 0.38 �
<br /> � 4. Total head required is the sum of elevation difference, 16 1.63 0.48 ' �
<br /> : � speclal head requirements,and total fricdon loss. 20 2.47 0.73 O.0
<br /> ! 2S 3.73 1.11 0.16 i
<br /> �I 4� + � +�_ �0.- -S.?3--- .53� O.Z3 �
<br /> (i) (2) (3c) 33 7.90 2.06 0.30 ,
<br /> ! 40 11.0T 2.64. 0.39 �
<br /> ` 4S 14.73 3.28� 0.48 � �
<br /> � TOTAL HEAD / b feet SO • 3.99� O.SB '
<br /> � • SS �.76, 0.70 ;
<br /> ' � 60 5.60; 0.82
<br /> C. Pwnp selection � �
<br /> ��Z. A pump must be selected to deliver at least 3 L gpm (Step A) �. �
<br /> .with at least„[,�feet of total head (Step B).
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