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� � + F-17
<br /> PLJMP SELECTTON PROCEDURE
<br /> . � EIO PERfORAT10N Of A PERFORATED LATERAL
<br /> A. Determine pump capadty: a-�
<br /> Gravity Distribution T....�
<br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of ,�;;,,�:..�- - «�..,,�,w f,,,k c,,,,,-
<br /> waber use nbe. `..�'s.,.u"• �'�«.N°""."'...'"'..
<br /> ��, �..,..r,....,
<br /> 2, Maximum suggested for delivery to a drop box of a home system is 2,700 . , ►-*^��-�^����°^�•�^
<br /> MM CJ�/Y�I TM
<br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. .,; ,' N�� ��.E�..
<br /> ... . . .... . /.A.,.M.e:.l�o�«.�
<br /> Pressure DisHbution � c,..,,.,.,,.,, »��«�,...�
<br /> 3.a. Select number of pezforated laterals � �
<br /> b. Select perfomtion spacing=.�_feet °r"""fiB '"'""'°"`M
<br /> ..�...�.d..�...�.�.
<br /> c Sub�2 R from the rock layer length.
<br /> R����-,�c� '2 f�_ ')'� feeti
<br /> d. Deternune the number of spaces between perforations.
<br /> I,ength perf.spacing=�ft.+�ft._�_�spaces Requiied Perforation D�t,.�e
<br /> e. �spaces+1=��Perforations/lateral m gau«u pQ�,�c�(gpa,f
<br /> f. Muldply perforations per lateral by number oE laterals to �3a v �. �d� �2�ap,,, i�d�
<br /> �et total number of perforations.�w„-,, x , ,ef,=2�_pe orattons. ��
<br /> g. '� x�P„�=43.8P� .
<br /> 1.Oa 0.56 0.74
<br /> SELECT'ED PUMP CAPACITY�_8Pm 2.Ob 0.80 1.04
<br /> B.Determine head requirements: a.Use for single family homes
<br /> 1. Elevation difference between pump and point of discharge. b.Use for all other applications
<br /> ,�,��feet
<br /> 2. If pumping to a pressure distribution system,five feet for pressure
<br /> required at manifold if gravity system,zero.
<br /> �_feet
<br /> 3. Friction loss
<br /> a. Enter friction loss table with gpm and pipe diameter. �P��►8�
<br /> Read friction loss in feet per 100 feet from table: Point of Discharge
<br /> F.L=�k/100 ft of pipe /o/,J
<br /> b. Determine to�al pipe length from pump to discharge pcvation Differ+rnce
<br /> poin� Add 25 peroent to pipe length for fitdng p�,p �'�S
<br /> loss,or use a fitting loss chart. Equivalent pipe
<br /> length-1.25 times p�length= F-18b
<br /> a y � x 1.?5= ?,O l. feet
<br /> C. Calculate total friCtion loss mu1H l n iS inch 2.0 inch 3.0 inch
<br /> br P r $ gpn, r,t�,a.�.�ooa�r ra�
<br /> friction loss in h/100 ft by equivalent pipe length. 10 0.69 0.20
<br /> Total friction loss= �, � x �b(� +100= � feet 12 0.96 0.28
<br /> 4. Total head required is the sum of elevation difference, 14 1.28 0.38
<br /> special head requirements,and total fricdon loss. �6 t.63 o.a8
<br /> is zos o.60
<br /> ��_ 20 247 0.73 0.11
<br /> + S + cl ?S 3.73 1.11 0.16
<br /> (1) (2) (3c) 30 5.23 1S5 0.23
<br /> 35 7.90 2.06 0.30
<br /> 40 11.07 2.64_. 039
<br /> ?OTAL HEAD �feet � -45 1a.73 3.28 0.48
<br /> 50 3.99 0.58
<br /> SS 4.76 0.70
<br /> C. Pump selection 6o s.bo o.s2
<br /> 1. A pump must be selected to deliver at least
<br /> y a gpm (Step A)with at least �_feet of total head(Step B).
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