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F-17
<br /> �'�
<br /> F PLTMP SELF.�'t(�N PRO URE
<br /> ElD PEHi'ORATION OF 4 PfRFOFATED IaTEAa�
<br /> A. Determine pump capacity: �_�..�
<br /> Gravity Distribution ,....,,
<br /> ]. Minimum sugge�sted is 600 gaJlons per hour(]0 gpm) to stay ahead of - . - - • w��„w F,,,��„,�,.
<br /> water use rate. .�.. �..�,s.�.� �"b,..�b,. u,..�.....<
<br /> ,��,...,�..�
<br /> 2. Maximum suggested for delivery ro a drop box of a home system is 2,700 _, . ��•��a��,b �„�,<„
<br /> �� � � roa
<br /> gallons per hour(45 gpm) to prevent build-up of pressure in drop box. , ,,;,,,„ -., �b., ,Z•�e �,,.
<br /> I� el Roc� Lq.�
<br /> � A!ti/'�IN�v V[IIN 01
<br /> Pressure Distibudon ��s«�,• °i""'« �"•^'
<br /> 3. a. Select number of perforated laterals -3
<br /> �.�.��.�� .,....,� ���
<br /> b. Select perforation spadng=�_feet ,,.,,��,,,,�,,,,
<br /> c. Subtract 2 h. from the rock layer length.
<br /> �� -2ft.=�_feet
<br /> r+��re�
<br /> d. Deteimu�e the number of spaces between perforations.
<br /> Length perf.spacing=�ft. +3.,_ft. = a„�spaces Required PesforaGon Di.sch e
<br /> e. ,�,�spaces+ 1 =�_perforations/lateral �,gallo�pe m;r,��e(gp�
<br /> f. Mulbply perforabons per lateral by number of laterals to 9��'�0�� D�H'�d e ;�z�a�., � „a�,
<br /> get total number of perforabons.�; x �,,, ��,_�l �perforations. �f��)
<br /> g� � X�°"°"'-�gP� 1.Oa 0.56 0.74
<br /> SELECT'ED PUMP CAPACTIY��gpm 2,.�b Q.8Q 1.04
<br /> B. Determine head requirements: a. Use for single family homes
<br /> l. Elevacion difference between pump and point of discharge. b. Use for all other applicaeoru
<br /> �_feet
<br /> � 2. If pumping to a pressure distribution rystem, five feet for pressure
<br /> mquired at manifold if gravity system,zero.
<br /> S feet
<br /> 3. Friction loss
<br /> a. Enter friction loss table with gpm and pipe diameter. gP���8�
<br /> Read friction loss in feet per ]00 feet from table. � Point o(D�schazgc
<br /> F.i_ _ �, L ft./]00 ft of pipe ry�� o
<br /> b. Determine total pipe length from pump to discharge Flevation DifCerrncc
<br /> point Add 25 percent to pipe length for fitting p�p _ o,y� �
<br /> ]oss,or use a fitting loss chart. Equivalent pipe
<br /> length- 1.25 times pipe length= F-18b
<br /> �_x 1.25 =�_feet
<br /> c. Calclilate total friction loss b multi 1 n 1.S inch 2.0 inch 3.0 inch
<br /> Y P Y� g g� Friaim lon pc 100(l ot p�pe
<br /> friction loss in h/100 h by equivalent pipe length.
<br /> Total friction loss= �• lo x (0 3 +100= � feet 10 0.69 0.20
<br /> 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 total friction loss. 16 1.63 O.a8
<br /> 18 2.03 0.60
<br /> 20 2.47 0.73 0.1]
<br /> )Z +�_+ �, 25 3.73 l.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 6o s.6o o.az
<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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