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<br /> ',.�;,;�P_�JMP-SEL-ECTTON PROCEDLraE ,
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<br /> �. A. Determine pump capacityc � � . �
<br /> <
<br /> Gravity Dietribution���';<ys;';;:.;:i
<br /> 1. Minimum`su8$esfed�is 20 gpm
<br /> ; ,,. �. ?. ,.
<br /> 2. Maximum`suggesEed�i's 45 gpm r ,
<br /> �
<br /> � � � . 4� � .
<br /> � , , . . ,
<br /> Pressure Diatib�uHo�n�' . �r����,,, ' � t " � �
<br /> 3.a. Selectnumber�of�iez` orated�1lterals�_ PerfonHon Disehuges in GPM
<br /> b. �Select perfo atio�n pJacing'` �^�'•'��3 • ' feet. . � :Head Perforation diameter
<br /> c Subtract 2 ftt�rom'�the rock;layer.length. �- � feet ;,,ct,es �
<br /> ,wa�u�`�i�u, 2�fE���'��l��"feet �.A. y 32 1 4
<br /> d. Deternune the number:of:spaces between perforations. Q l.oa 0.�4
<br /> Length.perf�sp�c,uig'=�"���`ft:+,:� -
<br /> ft.- �d s aces ls . 0.90
<br /> .'�` �`� � P' ' 2.Ob 0.80 1.04
<br /> e. �� spaces�,�1�,������perforationa/lateral '
<br /> f. Multiply�perforayhons'per�lateral by number of laterals to �; . a use�A foot single homes.
<br /> e t t o t a l n u m b e r�o f e r f o ra hons �x �__�pe r forations. b U s e 2 0 f e e t f o r a n y t h i n g e l s e.
<br /> ..,.,c„F�
<br /> S• �� x'�r� gpm,� �,'r•:� ; .
<br /> 7�- fi 1� � �' . . .
<br /> � 1 "�'��*' ` Z ��.. t�x �� �. � .
<br /> �;;SELECTED PUMP CAPACITY�L_gpm
<br /> � ��'�:� --.r74.w,.px t;:��.:.c�,���,..�a'1. • . �
<br /> B.Determine head requiiements•;;.; �� ` sou�,�,e.y.�,
<br /> 1. Elevation difference`tietween pump and point of dischazge. f6 :�
<br /> ��_ ., ;"' �,�..��'� �v.�(°_�_feek . Tow p�ia,g�,
<br /> `Y� 7�J if��{�:ti
<br /> 2. If pumping to`a:pressure distribution system,five feet for pressure
<br /> required at manifold'if gravity sYstem,zero.
<br /> ��t;;`a`k`"�`�' � feet �"� Elevaeore Dift«ence
<br /> 3. Friction loss r`�r-•�� ;" ��
<br /> �� � ,. , . , ------- -- -
<br /> �� a. Enter friction:loss table ivith gpm and pipe diameter. -••••-•.---_--•• . .
<br /> Read friction 1'os�';in`fee'E'per-100 feet from table(F-14). .
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<br /> F L�_ � :�r�f�`�J100`ft:of,pipe':.:' ,.
<br /> b. Deternune,"to,tal'p pe�;length'Erom;pump to discharge Friction Loss in Plastic Pipe �
<br /> poutt`:�:Estiaiate by'sadding'25 percent to pipe length for fitting Nominal
<br /> loss,,or use a'.fitting,loss;'chart(F-15,�Q�eet).
<br /> pIpe dia.
<br /> Equivalent`pipe length 1:25 hmes pipe length=
<br /> ',;;'�'' :p` hx`1:25 ;`:"�.feet F1owRate 1.5" 2" 3~
<br /> gpm
<br /> c. Calculate total friction loss by multiplying .
<br /> friction loss�in ft/100 ft by equivalent pipe length. 20 2.47 0.7 0.11
<br /> Total friction loss= �.�..x 2 S +100= ! feet 25 3.73 � 0.16
<br /> 4. Total head required is the sum of elevation difference, � 5•�3 1.55' 0.23
<br /> special head requirements,and total friction loss. 35 6.96 2.06 0.30
<br /> 40 8.91 � 2.64 0.39 ' �
<br /> 45 11.07 3.28 0.48
<br /> 3 +�_+ � 50 13.46 3.99 OS8
<br /> ,,,=(1) (2) (3c) 55 4.76 ' 0.70
<br /> 60 5.60 0.82
<br /> g 65 • 6.48 0.95
<br /> -,,'TOTAL HEAD 1 feet 70 7.44 1.09
<br /> C. Pump selection ���-.' ` .
<br /> , ,� '
<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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