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' � F-17
<br /> PUMP SELECTION PROCEDURfi
<br /> E1D PERFORA710N Of 4 PERFORATED LATERAL
<br /> A. Determine pump capacity: ���«
<br /> Gravity Distribudon ,.,..,' , ����I,�'p„
<br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of - . �q�v,,�..N„�.F,e,k,,,,�..
<br /> �+t..amr sana�aNr YrA c••
<br /> water use rate. ' ����.�,�,�..;'°'`°""°
<br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 , �+���^p����^�«,_^^�^��,
<br /> Mro coo w� �o
<br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ,.,;�„„ w-u�.,.� �:��a Eao.
<br /> �e er n«k w•,
<br /> . �.. �. �PvfererNn lewuA a�
<br /> Pressure Distibution ����•.• �""^"u'•"'
<br /> 3.a. Select number of perforated laterals 3
<br /> or�N�s.0►..OrM svUw
<br /> b. Select perforation spacing=�_ eet ,.,..,,.�,,,5.,,,,,.„,
<br /> c. Subtra 2 ft from the rock layer length.
<br /> �-�-2 ft._��fee�
<br /> d. Deternune the number of spaces between perforations.
<br /> L,ength �ecf.Sp3C1I1g=��ft.+�ft.=33_spaces Required Perfonaon D�sch e
<br /> e. �y,spaces+1=�perforations/lateral ��uo�p�r�+�+�te�p�{
<br /> f. Multiply perforations per lateral by number of laterals to ��3 z�o�� ���Be �2 m,��,,, � md�
<br /> get total number of perforations.� x �, �Q,,_�perforations. ����
<br /> g� �" X�''�-�gP� 1.Oa 0.56 0.74
<br /> SELECT'ED PUMP CAPACTTY��gpm 2.�b �.8� 1.�4
<br /> B.Determine head requirements: a.Use for single family homes
<br /> l. Elevation difference between pump and point of discharge. b.Use for all other applications
<br /> �O 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. RP��8�
<br /> Read friction loss in feet per 100 feet from table. poinc oE D��ha�ge
<br /> F.L._ �,l. ft./100 ft of pipe T55 y
<br /> b. Determine total pipe length from pump to discharge Elcvation Differencel
<br /> point. Add 25 percent to pipe length for fitting p�p ��
<br /> loss,or use a fitting loss chart. Equivalent pipe
<br /> length-1.25 times pipe length= F-18b
<br /> �x 1.25=��feet
<br /> c. Calculate tOtal friCtion loss b multi 1 n 1.5 inch 2.0 inch 3.0 inch
<br /> Y P Y� $ �m Friaion lan pa 100 ft of pipe
<br /> friction loss in k/100 k by equivalent pipe length.
<br /> Total friction loss= x �, +100= Eeet 10 0.69 0.20
<br /> �• � -2�� � 12 0.96 0.28
<br /> 4. Total head required is the sum of elevation difference, 1a 1.28 0.38
<br /> special head requirnments,and total fricdon loss. 16 1.63 o.a8
<br /> 18 2.03 0.60
<br /> 20 2.47 0.73 0.11
<br /> �_+ _� +�_ 25 3J3 1.11 0.16
<br /> (1) (2) (3c) 30 5.23 1.55 0.23
<br /> 35 7.90 2.06 0.30
<br /> ?OTAL HEAD a 40 11.07 2.64 0.39
<br /> _�feet 45 14.73 3.28 0.48
<br /> 50 3.99 0.58
<br /> 55 4.76 0.70
<br /> C. Pump selection bo s.bo o.a2
<br /> 1. A pump must be selected to deliver at least
<br /> �_gpm (Step A) with at least ��,feet of total head (Step B).
<br />
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