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<br /> F-17
<br /> .:�„ PiTMp SEr.FCTiON PROCEDURE
<br /> E?O P£RFORATION OF G pERFpReTE�i L�TE�
<br /> A. Determine pump capadty: �-�«
<br /> Gravity Disfributioa T.,.o„
<br /> 1_ Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of = :_ - �
<br /> .`��.a,so.a�,- �►'��`�.:`+'b:�``�"��::.:`.
<br /> water use rate. � �,.,b...�,�.,'
<br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 ., , ��•��a���-^ ��^w�
<br /> ��� ,+.a. �..
<br /> gallor�s per hour(45 gpm)to prevent build-up of pressure in drop box. ��,•P,,,, :-.,�.e., �:•�.��.
<br /> �,.�. .���,..
<br /> � _ ... '' Pr�ororMir Lora1N�t
<br /> Pressure Distibution :'�,..,s,,,.,,,� e"'^'^N L�i•�m
<br /> 3.a. Select number of perforated laterals 3 .
<br /> b. Select perforation spacing= 3 feet °�,,'"�"°',�;;,;�;R""°
<br /> c. Subtract 2 ft from the rock layer length.
<br /> �`� -2 R= ( feet
<br /> ���
<br /> d. Deterrrune the number of spaces bet�veen perforations.
<br /> I,ength �.spacing=�ft.+ 3 ft.=3_spaces tt�quued Perforaaon�e
<br /> e. �-�spaces+1=_�perforations/lateral �8�°�p��°te tgp�,
<br /> f. Multiply perforations per lateral b�number�f]aterals to ��3��o,a. ��dBe �Zm�R,, + ad� �
<br /> get total number of perforations. �,�,,� x�,�Q,,=�_perforations. �p�q i
<br /> g� � X��_�gP� I.Oa 0.56 0.74 '
<br /> SELECTED PUMP CAPACITY 3� gpm 2,�b �.8� 1.�4 . I
<br /> B.Detezmine head requirements: ' a.Use for single family homes
<br /> 1. Elevarion difference between pump and point of discharge. b.Use for all other applicatiorts (
<br /> �_feet ' i
<br /> � Z If pumping to a pressure distribution system,five feet for pressure
<br /> ^ required at manifold if gravity�stem,zero.
<br /> �_feet
<br /> 3. Friction loss
<br /> a. Enter friction]oss table with gpm and pipe diameter. RP��8�
<br /> Read friction loss in feet per 100 feet from table. � poinc of Dischz
<br /> F.L= �. L ft./100 ft of pipe T��'�
<br /> b. Determine to�il pipe length from pump to discharge Elcvation Differcncc I
<br /> poin� Add 25 percent to pipe length for fitting �p�P y,�c
<br /> ]oss,or use a fitting loss chart. Equivalent pipe
<br /> length-1.25 times pipe length= F-18b
<br /> �x1.25= �`d feet
<br /> c. Calculate total friction loss b multi 1 n 1.5 inch 2.0 inch 3.0 inch
<br /> Y P Yl g g� Friaim Im pc]00 ft of pipe
<br /> friction loss in ft/100 R by equivalent pipe length. 10 0.69 0.20
<br /> Total friction loss= a. �- x `5 4� +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 tota] friction loss. 16 1.63 0.48
<br /> 18 2.03 0.60
<br /> 20 2.47 0.73 0.11
<br /> � + � + � 25 3.73 1.11 0.16
<br /> (1) (2) (3c) 30 5.23 1.55 0.23
<br /> 35 7.90 2.06 030
<br /> TOTAL HEAD �feet � � 14.�73 3.8 0.48
<br /> 50 3.99 0.58
<br /> C. Pump selection 6o s.bo o.s2
<br /> � 1. A pump must be selected to deliver at least
<br /> �gpm (Step A) with at least � �a feeE of total head (Step B).
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