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F-17
<br /> �,�
<br /> � PL1MP SEI.ECTION PAOCEDt�E
<br /> ElA PEi7F0itAT10N CF 4 P£RFORAT� LATER4l
<br /> � Determine pump capacity: �-G-,
<br /> Gravity Distribution T.««� �
<br /> 1. Minimum suggested is 600 gallons per hour(10 gpm) to stay ahead of - . «�,,,,,,w F,,,K,,,,,,,
<br /> water use race. �'�..�,s.,.�,. �"�,..��„,, w,..�.,.....
<br /> 'w,.�.,..,,�-,
<br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 .. . ^��•��p���° ���°^�°'��
<br /> .,�� ..., ,.a
<br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. . �,;^,„ ; -., �.�., �:•�> �a,.
<br /> �e .i n«. w..
<br /> VvM�lhr��e[JIN al
<br /> Pressure Distibution �'�^�°^'� �""'"" """'
<br /> 3. a. Select number of perforated laterals
<br /> b. Select perforation spacing= feet ;�.'.�,",.''�",�,""°
<br /> c. Subtract 2 ft from the rock layer length.
<br /> ����-2ft. = feet
<br /> d. Deterrrune the number of spaces bet�veen perforations.
<br /> Length perf,spacing= ft. + ft.= spaces Reyui:ed Perforabon Diuh e
<br /> e. _spaces+ 1 = perforations/lateral �+g.11ons p�a,u,�ce(gp�
<br /> f. Multiply perforadons per lateral by number of laterals to DH�d8e �Z.aP,,,, � Pa�
<br /> get total number of perforadons. W��,� x �,,, 1e,,= perforations. �f�e�
<br /> g� � X�"°"' -gP�� 1.Oa 0.56 0.74
<br /> SELECI"ED PUMP CAPACITY gpm 2.Qtj 0.$� 1.04
<br /> B.Determine head requirtments: a. Use for single family homes
<br /> 1. Elevation difference between pump and point of discharge. b. Use for all other applications
<br /> _�,,,�fe e t
<br /> � 2. If pumping to a pressure distribueon rystem, five feet for pressure
<br /> required at manifold if gravity system,zero.
<br /> �_feet
<br /> 3. Fricdon loss
<br /> a. Enter friction loss table with gpm and pipe diameter. � �P��8�
<br /> Read friction loss in feet per 100 feet from Wble. � Point of Dischargc
<br /> F.t.. _�_ft./100 ft of pipe y��
<br /> b. Deterrnine total pipe length from pump to discharge Elcvation Differcncc�
<br /> point Add 25 percent to pipe length for fitting pw,p _�,��
<br /> loss,or use a fitting loss chart. Equivalent pipe
<br /> length - 1.25 dmes pipe length= F-18b
<br /> /no x1.25 = 2� feet
<br /> c. Calculate total friction loss by multiplying � 1•5���1����n�v��ch
<br /> friction loss in ft/100 h by equivalent pipe length.
<br /> Total fricGon loss= ���`I x l a-� +100= 3 feet 10 0.69 0.20
<br /> 12 0.96 0.28 I
<br /> 4. Total head required is the sum of elevation difference, 14 1.28 0.38
<br /> special head requirements,and total fricdon loss. 16 1.63 O.a8
<br /> ]8 2.03 0.60
<br /> 20 2.47 0.73 0.11
<br /> ► 3 + ,� +�_ 25 3.73 1.11 0.16
<br /> (1) (2) (3c) 30 5.23 1.55 0.23
<br /> 35 7.90 2.06 0.30
<br /> 40 11,07 2.64 0.39
<br /> TOTAL HEAD .�_feet � 45 1a.73 3.28 O.a8
<br /> 50 3.99 0.58
<br /> 55 4.76 0.70
<br /> C. Pump selection bo s.bo o.s2
<br /> � 1. 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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