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PUMP SELECITON PROCEDURE ' � '
<br /> A. Determine pump capacity:
<br /> � END PERFORATION OF A PERFORATED LATERAL
<br /> 'Gravity Distribution
<br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of �,,.�.w,
<br /> water use rate. r-'-
<br /> 2. Maximum suggested for delivery to a drop box of a 1*.ome system is 2,700 .,......:,_,,,.T�. '
<br /> ..,.::..�..-. .. .. .
<br /> ,��,,.;,..;. . .J:�,,.
<br /> ,�Lqv of GeoN�11N faWk(a►ar-
<br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ��-�: �.a«�,,s,�a�,�., ..,�,,,,,,,a.�,a w,a.,�..e
<br /> � '���-:,�.:. ;�.itM r.a renn yape.)
<br /> P�rlaatbn Or11Nd Horizomolly
<br /> Pressure Distribution aa p n.a. �p
<br /> 3. a. Select number of perforated laterals�_ '�:�w :� N � �2•�o�a�
<br /> .°_ .w�a or r+ea�..
<br /> b. Select perforation spacing=�_ft. . � '� °-P;;,�;;;�;;'�,�a�
<br /> c. Subtra 2 ft.from the rock layer length. ����,« �°"°'"°"-°'•�'
<br /> ;,:.
<br /> .:: .
<br /> .:
<br /> ., .
<br /> -2 ft._�_ft. �;::'.::..:. ..:.::.:.::.:. ..�_ ... . ..;
<br /> ����+n.e
<br /> d. Determine the number of spaces between perforations.
<br /> Length perf.spacing=��ft.+�ft._�.spaces
<br /> TABLE OF PERAORA170N DISCHARCES W GPM
<br /> e. � 1 spaces+1 = �'; perforations/lateral
<br /> ' f. Multiply perforations per lateral by number of la terals to Head Perforation diameter(inches)
<br /> get total number of perforations. n ,,
<br /> � ,
<br /> �� x ��-*�_�g_perforations. 1'S��1� �a �'
<br /> 1.Oa OS6 0.74
<br /> g' � X a�-.�2$Pm• z� o.beo9 i.o
<br /> 2S 0.89 t.17
<br /> SELECTED PIJMP CAPACITY 39 � 3.0 0.98 t.2a
<br /> 8P a.o iaa �.a�
<br /> 5.0 �.26 1.65
<br /> B.Determine head requirements: aUse 7.0 foot of head for residential systems.
<br /> 1. Elevadon differencebetween pu pand point of discharge. bUse2.oEeecofheadforocherescablishmen�s
<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�Pe�8� �
<br /> a. Enter fricHon loss table with gpm and pipe diameter. Point of Discharge
<br /> Read friction loss in feet per 100 feet from table. �jg�
<br /> F.L._ �.lo ft./100 ft of pipe Elevation Difference
<br /> b. Determine total pipe length from pump to discharge p„mp q.y o
<br /> point. Add 25 percent to pipe length for fitting
<br /> loss,or use a fitting loss chart. Equivaleilt pipe F-18b
<br /> length-1.25 times pi length=
<br /> �x 1.25=�_feet gpm 1.F ncucohi�loss ai 00 ft of p�inch
<br /> c. Calcvlate total friction loss by multiplying l0 0.69 0.20
<br /> friction loss in ft/100 ft by equivalent pipe length. 12 0.96 0.28
<br /> Total friction loss= �,(� x_f�y +100=_�feet 14 1.28 0.38
<br /> 4. Total head required is the sum of elevation differcnce, 16 1.63 0.48
<br /> 18 2.03 0.60
<br /> special head requirements,and total friction loss. 20 2.47 0.73 0.11
<br /> 25 3.73 1.11 0.16
<br /> � + � +_� 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 0.58
<br /> 55 4.76 0.70
<br /> 60 5.60 0.82
<br /> C. Pump selection
<br /> t 1. A pump must be selected to deliver at least��gpm (Step A)
<br /> with at least�4�feet of Eotal head (Step B).
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