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<br /> <,�„�' pI7MP SELECTION PROCEDURE
<br /> ENO PERFORATION OF A PERFORATED LATERAL
<br /> A. Determine pump capacity: �.a.,c.,...
<br /> Gravity Distribution ,.,�,,,
<br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of ;.: � . • a�,N„�.�,k�a,a,-
<br /> water use rate. �`°'"'S"°""' ``'�"'"'°'"°„ "a�."'°
<br /> • .���.e.,,,�;
<br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 , , ►K+�•��a������=��•�h
<br /> .,»WO N.., .ey
<br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ,,.,;qw ;_�,�p., ,2•„E,,.
<br /> ia or a«►�.r
<br /> - _ :�r:..: �.... Frfermhn lecelW ol
<br /> Pressure Distibution -�:���..��e� ���^M�^�•��
<br /> 3.a. Select number of perforated laterals � .
<br /> o.�o+w an ►r.o.nr scsuw
<br /> b. Select perforation spacing= ? feet �,.,,p,,d,,,5ai,,�,,,�
<br /> c. Subtr ct 2 ft from the rock layer length.
<br /> ��-2ft.= ' _feet
<br /> d. Det rnune the number of spaces between perforations.
<br /> Length perf.spacing=;�ft.+�ft._�_spaces Reyvired Perforation L)isch e
<br /> e. �spaces+ 1 =��perforations/lateral ' �S�o�P����e�SP�
<br /> f. Multiply perforations per lateral by number of laterals to ��8e , ma ,
<br /> Z yf Head �2 � 4�d�r
<br /> get total number of perforations. „�� x �) i��=��perforations. �f�c>
<br /> g. .� x��v�_�$P�- .
<br /> 1.Oa 0.56 0.74
<br /> SELECTED PUMP CAPACIIY��gpm 2.�b �.80 1.�4 .
<br /> B.Determine head requirements: a.Use for single family homes
<br /> 1. Elevarion difference between pump and point of discharge. b.Use for all other applications
<br /> �_feet
<br /> �*s� 2. If pumping to a pressure distribution system,five feet for pressure
<br /> H required at manifold if gravity system,zero.
<br /> �feet
<br /> � 3. Friclion loss
<br /> ' a. Enter fricdon loss table with gpm and pipe diameter. � Rpe t-«�g�h
<br /> Read friction loss in feet per 100 feet from table. Poinc of D'uchargc
<br /> F.L._ �.��I ft./100 ft of pipe s
<br /> b. Determine total pipe length from pump to discharge Elevation Diffcronce�
<br /> point. Add 25 percent to pipe length for fitting �p�p o>�a
<br /> loss,or use a fitting loss chart. Equivalent pipe
<br /> length-1.25 times pipe length= F-18b
<br /> )3� x 1.25= I�3_feet 1.5 inch 2.0 inch 3.0 inch
<br /> c. Calculate total friction loss by multiplying �m Fricxim lm pa 100ft of Pipe
<br /> friction loss in h/100 ft by equivalent pipe length.
<br /> To�zl friction loss= �.l.y x /(<� +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 0.48
<br /> 18 2.03 0.60
<br /> 20 2.47 0.73 0.11
<br /> �_+�_+�_ 2S 3.73 i.l l 0.16
<br /> (1) (2) (3c) 30 5.23 1.55 0.23
<br /> 35 7.90 2.06 030
<br /> 40 11.07 2.64 039
<br /> TOTAL HEAD a a feet � 45 14.73 3.28 0.48
<br /> 50 3.99 0.58
<br /> G Pump selection 55 4.'76 0.70
<br /> 60 5.60 0.82
<br /> ''-�° 1. A pump must be selected to deliver at least
<br /> r;,��,s�
<br /> j}.`�• .
<br /> � 1 � p gpm (Step A) with at least �a feet of total head (Step B). �
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