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<br /> F-17
<br /> PUMP SELECTION PROCEDURE
<br /> E/JD PERFORATION OF A PERFORATED LATERAL
<br /> A. Determine pump capacity: w...4...
<br /> Gravity Distribution T�,,,,, -'`
<br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of - • -to-�.r a����,k��„a,-
<br /> V�� team�sma lnr..` �rb ior.a nor>u,u.w...w
<br /> water use rate. "" ��,.,,o.,,,,,,.,,
<br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 . . ���b^au���_^^���ti
<br /> Mlo Cap M�e/ Top
<br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ,;.,;p,„ ;�_u��., ,Z•„E,9.
<br /> e�R«.a.,
<br /> ... . ... ��wro.aia..�o�o�w a�
<br /> Pressure Distibution ��••��.� �°"°^�«�^,��
<br /> 3.a. Select number of perforated laterals �
<br /> b. Select rforation s cin feet °'""°'�°" '^°�'y�'""
<br /> Pe Pa g=�- �>.�,.�,,.,„,
<br /> c. Subtra 2 ft from the rock layer length.
<br /> � ��-2 ft.= l s(� feet
<br /> d. Deternvne the number of spaces between perforations.
<br /> Length perf.spacing=�1�ft.+��ft._��spaces Requind Perforation Diuhazge
<br /> e. �3 spaces+ 1 =�_perforations/lateral �,g�►o�p�a,v,�ce tgpm>
<br /> f. Multiply perforations per lateral by�numbe�of laterals to �/3� ��d e 32 maR,, 4 �,d�
<br /> get total number of perforations. �«�� x �S ��=11�perforatrons. �f��)
<br /> g. � X•�.�`_�gp�• 1.Oa �.(L5� 0.74 ,
<br /> SELECTED PUMP CAPACITY 3�_gpm 2.�b 0.g� 1.�4
<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. Pipe Lengch
<br /> Read friction loss in feet per 100 feet from table. � Po�c of Discharge
<br /> F.L._ �'c� ft./l00 ft of pipe Tg��
<br /> b. Determine total pipe length from pump to discharge Eie�adon Difference!
<br /> point. Add 25 percent to pipe length for fitting p�p _I,��
<br /> loss,or use a fitting loss chart. Equivalent pipe
<br /> length-125 times pipe length=
<br /> �.� x 1.25=��feet F-18b
<br /> c. CalCulate total friCtion loss b multi 1 n 1.5 inch 2.0 inch 3.0 inch
<br /> Y P Y� $ � Fnaim,«.pc�aorc or o�p� .
<br /> friction loss in ft/100 ft by equivalent pipe length.
<br /> Total friCtion loss= x a.,b +100= feet 10 0.69 020
<br /> -�1- � 12 0.96 0.28
<br /> 4. Total head required is the sum of elevation difference, 14 1.28 038
<br /> special head requirements,and total friction loss. 16 1.63 o.a8
<br /> 18 2.03 0.60
<br /> 20 2.47 0.73 0.11
<br /> S + S� + � ZS 3.73 1.11 0.16
<br /> (1) (2) (3c) 30 5.23 1.55 0.23
<br /> 3S 7.90 2.06 030
<br /> 4U 11.07 2.64 0.39
<br /> TOTAL HEAD �_feet 45 1a:73 3:28- 0.48
<br /> �0 3.99 0.�8
<br /> �5 4.76 U.70
<br /> C. Pump selection 6o s.6o o.g2
<br /> l. A pump must be selected to deliver at least
<br /> �_gpm (Step A) with at least �feet of total head (Step B).
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