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� PUMP SELECTION PROCEDURE
<br /> A. Determine pump capacity:
<br /> _�
<br /> -Gravity Distribudon �o ��au►TioH OF A PERFORATEO LATERAL
<br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of Wa..c,,,.,
<br /> water use rate. T� ,�„ ���'
<br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 . ,....:.,;�,.._ ... ....,;>,,..;.:;:.:.:,
<br /> ti;.`.;. �.r•- �r ot Geot�atll�Fabrk la rov-
<br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. x-':'�,.�,,s��e�,,., �`�,,,.,,,,,,,,„a„R�,.�,.,
<br /> � sv�:-y-�:.... �::�win rea.wln pao�r) .
<br /> PKlaolfon OrqhO Horlson�ollr
<br /> Pressure Distribution - "a o '"°� �o
<br /> 3. a. Select number of perforated laterais 3 '�:�w ,� "' u°" 'z•'°Eao'
<br /> „o FIN Roc ��• • ot Rock Loyn
<br /> b. Select perforation spacing=�_ft. . � •� � � �~-��•�� �°
<br /> ; ..,, �.... • P�rlwotiaq Locorw ot
<br /> c. Subtract 2 ft.from the rock layer length.
<br /> :'�.�' Clws Sand LaYK Bol�aw of Lat�ral
<br /> �-2 f�_�_ft. ::.,::..:,,._:.: : ...:_.. ..,:�.:.:
<br /> ����m.a
<br /> d. Determine the number of spaces between perforations.
<br /> Length perf.spacing=9„1_ft.+�ft.=3 c� S�CeS TABLE OF PERFC>RATION DISCHARCES W CPM
<br /> e. 3v spaces+1 = 3 I perforations/lateral
<br /> ' f. MulHply perforations per lateral by number of laterals to Head Perforation diameter(inches)
<br /> get total number of perforations.
<br /> � �/� �/�
<br /> e � x .�_�perforaHons.
<br /> i.o� � o.sb oaa
<br /> ]S Ob9 0.90
<br /> $• � X�_��m• 2.Ob 0.80 1.04
<br /> 2S 0.89 1.77
<br /> 3A 0.98 1.28
<br /> SELECI`ED PUMP CAPACITY��gpm 4A 1.13 1.47
<br /> SA 1.26 1.65
<br /> B.Dete=mine head requirements:
<br /> �1. Elevation difference between um and �nt of dischar e. au�l.o�°°t°f�d wr'�'�"t�syst�.
<br /> P P � $ bUse 20 feet of 2�ad for other establishments
<br /> � ��feet .
<br /> 2. If pumping to a pressure distribution system,add 6ve feet for pressure
<br /> required at manifold
<br /> �feet
<br /> 3. Friction loss P'�I-a'g�
<br /> a. Enter friction loss table with gpm and pipe diameter. ��� Poinc of Discharge
<br /> Read friction loss in feet per 100 feet from table. /°�
<br /> F.L.= 4.a f�/100 ft of pipe Elcvadon Difference
<br /> b. Determine total pipe length from pump to discharge p�,n,p �S
<br /> poin� Add 25 percent to pipe length for fitting .
<br /> loss,or use a fitting loss chart. Equivalent pipe F-18b
<br /> length-1.25 times pipe length=
<br /> 1.5 inch 2.0 inch 3.0 inch
<br /> �_x 1.25= � D Q feet � Fa��m�.�iooaar��
<br /> c. Calculate total friction loss by multiplying l0 0.69 0.20
<br /> friction loss in ft/100 ft by equivalent pipe length. 12 0.96 0.28
<br /> Total friction loss= �.Z x 'a c9 c7 +�00=�_feet 24 1.28 0.38
<br /> 4. Total head required is the sum of elevation difference, 16 1.63 0.48
<br /> s al head u'irements,and total friction loss. 18 2.03 0.60
<br /> p� i''eQ 20 2.47 0.73 O.TI
<br /> � � 25 3.73 1:11 0.16
<br /> �+_�_+ u 30 5.23 1.55 0.23
<br /> (1) (2) (3c) 35 7.90 2.06 030
<br /> 40 11.07 2.64 039
<br /> 45 14.73 3.28 0.48
<br /> TOTAL HEAD �_feet 50_ � 3.99. 0.58
<br /> 55 4.76 0.70
<br /> 60 5.60 0.82
<br /> , `G Pump selection
<br /> ��1. A pump must be selected to deliver at least�gpm (Step A)
<br /> with at least a,�feet of total head (Step B).
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