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PiJMP SELECTInN PRO FD�E • •
<br /> , A. Determine pump capacity:
<br /> � Gravity Distribution EN� PERFORATION pF A PERFORATED LATERAL
<br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of
<br /> c.o..co�«
<br /> water use rate.
<br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 T�
<br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. '��,,,,,,,5a�,� � '`��r«of Geot�ull� rbo.k�a,«,-
<br /> NK '.kicA Iqer ol noy a aro.cova.a
<br /> _, • ,:���nd rosin paper)
<br /> Pressure Distribution ef� e P�rlac�ion OrUted Hwizonio��y
<br /> Nlo P �or Top
<br /> 3. a. Select number of perforated laterals 3 `�,;��, ', a ��., ,z.,,�a�
<br /> b. Select rforation s 8C111 ' a' Faia•a �.: o� r�ock t�yK
<br /> Pe P g=�_ft. .:. : P.;►ao,��„'��.a o�
<br /> c. Subt�ct 2 ft.from the rock layer length. c,.,,,sa,,,,.,„, ea��«�o� ��..a,
<br /> '�, „� -2ft.=�ft.
<br /> aa+�i son v.av«�,,s�«�nw
<br /> d. Determine the number of spaces between perforations. ���`�Pb``'°Sand`°'"`
<br /> Length perf.spacing-�_ft.+�ft._ �� spaces
<br /> e• ��- spaces+ 1 =�_�rforaHons/lateral TABLE OF PERAORqTIOP1 DISCHpRCFS IN GPM
<br /> ' f. Muldply perforaHons per lateral by number of laterals to Head Perforationdiameter(inches)
<br /> get total number of perforations.
<br /> �
<br /> ,�. X �,. ,�,,_�_perforations. �I3a. ��A �p '�.
<br /> � 9 i 1.0a OS6 0.74
<br /> g� �� X av�v�.r-�`�gPm• �s 0.69 0.90
<br /> 2.Ob 0.80 l.pq
<br /> 2S 0.89 1.17
<br /> SELECTED PUMP CAPACITY_�_gpm 3.0 0.98 1,2g
<br /> 4.0 1.13 �,47
<br /> 5.0 126 1.65
<br /> B.Determine head requirements:
<br /> 1. Elevation difference between pump and point of dischar e. aUse lA foot of head for residential systems.
<br /> � bUse 2.0 feet of head for other establishments
<br /> ��feet
<br /> 2. If pumping to a pressure distribution system,add five feet for pressure
<br /> required at manifold
<br /> �_feet
<br /> 3. Friction loss p��L�g�
<br /> a. Enter friction loss table with gpm and pipe diamcter. � '
<br /> Read friction loss in feet per 100 feet from table. Poine of Discharbe
<br /> /vu7
<br /> F.L. _ �. �,, ft./100 ft of pipe
<br /> b. Determine total pipe length from pump to discharge Ele�aiion D�fference
<br /> point. Add 25 percent to pipe length for fitting �'P ���G
<br /> loss,or use a fitting loss chart. Equivalent pipe
<br /> length-125 times pipe length= F-18b
<br /> /�J x 1.25= �'U C� feet 1.5 inch 2.0 inch 3.0 inch
<br /> 8Pm Friction loss per 100 ft o(pipc
<br /> c. Calculate total friction loss by multiplying
<br /> friction loss in ft/100 ft by equivalent pipe]ength. 10 0.69 020
<br /> Total friction loss= � . � x y) �t� +1 pQ-�_feet 14 �.28 0.38
<br /> 4• "rotal head re�,,uired is the sum of cleva;ion diffcre;lcc, 16 1.63 0.48
<br /> special head requirements,and total friction loss. 18 2.03 0.60
<br /> 20 2.47 0.73 0.11
<br /> 25 3.73 1.11 0.16
<br /> � `"-' + j + � 30 5.23 1.55 0.23
<br /> (1) �2? �3c� 35 7.90 2.06 0.30
<br /> 40 11.07 2.64 0.39
<br /> 45 14.73 3.28 0.48
<br /> TOTAL HEAD feet 50 3.99 O.S8
<br /> 55 4.76 0.70
<br /> 60 5.60 0.82
<br /> C. Pump selection
<br /> 1. A pump must be selected to deliver at least,�� �pm (Step A)
<br /> with at least ��� feet of Eotal head (Step B).
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