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PUMP SELECTION PROCEDURE
<br /> A. Determine pump capacity:
<br /> \Gravity Distribution END PERFORATION OF A PERfORATED LATERAL
<br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of rc,a„�,,,.,
<br /> water use rate. T,pa�� ��t�"
<br /> 2. Maximum suggested f�1.d�elivery to a drop box of a home system is 2,700 � ... " , . ..
<br /> ' ��`���Loy�r ol Geot��til� FoOrk fa far•
<br /> gallons per hou�gp�to prevent build-up of pressure in drop box. : ��,,,,sa�e�,�. -�,��,�,,,,�y„,,,,,,«,r.a
<br /> .;.:ritn red rwi�DoD�*)
<br /> e�w a era P�rlaaibn DrlUed Hwlionwlly
<br /> Pressure Distribution • • • • '"'° •° "°°` r°o
<br /> 3. a. Select number of perforated laterals �-- �'i:v��+ ,�, A� ��v�� �z•�o Eao.
<br /> .��Dwin Flsld RocM�� .,�i' ol Rxk laye�
<br /> b. Select perforaHon spacing= - ft. ' ` P„,ao,io�s'��a�ea m �
<br /> c. Subtract 2 ft.from the rock layer length. c,.a�s��c�,... Bo��om ol Lo��ral
<br /> ----- _
<br /> 2 ft�_- ft. . : , . .
<br /> ��`�_ aioi�oi son P.oa,iY sw�nw
<br /> Belor.PlocMq sard Loyer
<br /> d. Determine the number of spaces between perforations.
<br /> Length perf.spacing= . ft.+ ft.= spaces TABLE OF PERFORATION DISCHARGFS 1N GPM
<br /> e. spaces+ 1 = perforations/lateral
<br /> ' f. Multiply perforations per lateral by number of laterals to Head Perforationdiameter(inches)
<br /> get total number of perforations. , ,
<br /> �r. X -.,s. .���____ �rforations. �" ��
<br /> 1.0a OS6 0.74
<br /> _..__ __ .. lS 0.69 0.90
<br /> g• �. X BP,,, �= gPm• 2.ob o.so �.oa
<br /> 2S 0.89 1.17
<br /> SELECTED PUMP CAPACITY �J m Yn K}X 3.0 0.98 t.28
<br /> gP 4.0 I.]3 1.47
<br /> 5.0 1.26 t.65
<br /> B.Determine head requirements: aUse].0 foot of head for residenHal systems.
<br /> 1. ElevaHon difference between ump and point of discharge. bUse 2A feec of head for other establishmencs
<br /> �_feet
<br /> 2. If pumping to a pressure distribution system,add five feet for pressure
<br /> required at manifold
<br /> feet
<br /> 3. Fricrion loss , P'�Le"g� F
<br /> a. Enter friction loss table with gpm and pipe diameter. � Poinc of Discharge
<br /> Read hiction loss in feet per 100 feet from table. �J �S
<br /> F.L.= 3 .a� ft./100 ft of pipe Elevauon Difference
<br /> b. Determine total pipe length from pump to discharge p�,,,,p g �
<br /> point. Add 25 percent to pipe length for fitting
<br /> loss,or use a fitting loss chart. Equivalent pipe F-18b
<br /> length-1.25 times p\ipe length= 1.5 inch 2.0 inch 3.0 inch
<br /> „ U x 1.25 = �3 feet gpm Friaion loss pa 100 ft of pipe
<br /> c. Calculate total friction loss by multiplying 10 0.69 0.20
<br /> friction loss in ft/100 ft by equivalent pipe length. 12 0.96 0.28
<br /> Total friction loss= �3 x '3•�4� +100= � feet 14 1.28 0.38
<br /> 4. Total head r uired is the sum of elevation difference, 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 3J3 1.11 0.16
<br /> r) + � + � 30 5.23 1.55 0.23
<br /> 35 7.90 2.06 030
<br /> (1) (2) (3c) 40 11.07 2.64 039
<br /> 45___ 14.73 3.28 0.48
<br /> TOTAL HEAD � feet 50 3.99 0.58
<br /> SS 4.76 0.70
<br /> 60 5.60 0.82
<br /> C. Puxnp selection q /I�i�UY�"�
<br /> -1. A pump must be selected to deliver�- �!�' gpm (Step A)
<br /> with at least `� feet of total head (Step B).
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