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. , , � . <br /> ' '�PUMP SELECTTON PROCEDURE . <br /> =:;�; ' . <br /> � A. Determine pump,capacity: <br /> Gravity Distribution��;x,g'�,�F��;,_; <br /> 1. Minunum suggested is 20 gpm <br /> 2. Maximum suggested is 45 gpm <br /> , `,;, r ,; ;. , <br /> Pressure Distibution Y;;",s, `�4 �` <;, . <br /> 3. a. Select"number of;perforated laterals_ '� PerforaHon Diecharges in GPM <br /> b. Select perfora#ion.spacing`='`' '' 3 feet. Head Perforation diameter <br /> c. Subtract 2 ft:fr'om?the iock:layer length. - feet inches <br /> �� 2 ft'_� �' "`�p �'feet.. � 32 1/4 <br /> Rodc layer Im6th + <br /> d. Determine the'number of spaces between perforations. R �.oa o.74 <br /> Length perf spaculg='�"ft.+ 3 ft._ �G' apaces ls . 0.9° <br /> 2.Ob 0.80 1.04 <br /> e. �� spaces+;1'='���/�"��'�;perforations/lateral <br /> f. Multiply perforations per,lateral by number of laterals to a Use l.o foot single homes. <br /> �� b Use 2.0 feet for anything else. <br /> get total numlier.of;'perforations.� x ��� � _�(i perforations. <br /> S' `�s X#�1� �8Pm , <br /> fp �, n <br /> �f�F��a�#t,s� ,, . - . . <br /> SELECTED,PUMP CAPACITY�(_gpm <br /> ;G: :.,�. . <br /> ' Soil treatment ry�tem <br /> B.Determine head requirementa: ` <br /> 1. Elevation difference between pump and point of discharge. ' �' <br /> ' w:_��feet Total pipe length <br /> � �����..,�. � <br /> 2. If pumping to''a'�pressure distribution system,five feet for pressure <br /> required at manifold if gravity sYstem,zero. <br /> � feet I"�e� Elevation Differnnce <br /> pipe <br /> 3. Friction loss -„:'' '� , ------- -- - <br /> ,... . <br /> �� a. Enter friction loss table with gpm and pipe diameter. -•..•-.....-••-.. . . <br /> ------------------------------------- <br /> Read friction loss in feet per 100 feet from table(F-14). <br /> F.L._ . }�' �jft:%100.ft of pipe , <br /> b. Determine total''pipe,length from pump to discharge Friction Loss in Plastic Pipe <br /> point.'EstImate by adding`25 percent to pipe length for fitting Nominal <br /> loss,or use a fitting loss chazt(F-15 R 0 feet). pipe dia. <br /> Equivalent pipe length-1.25 times pipe length= <br /> ,.z� x 1.25= 2 $� feet Flow Rate 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= ). r r x 2 S +100= 1 feet � 3.73 � 0.16 <br /> 4. Total head required is the sum of elevation difference, 30 5.23 1.55 0.23 <br /> s ecial head re uirements,and total friction loss. 35 6.96 2.06 0.30 <br /> P q 40 8.91 � 2.64 0.39 � <br /> f 45 11.07 3.28 0.48 <br /> - 3 +_�+ , 50 13.46 3.99 0.58 <br /> (1) (2) (3c) 55 4.76 0.70 <br /> 60 5.60 0.82 <br /> v 65 • 6.48 0.95 <br /> TOTAL HEAD ! feet 70 7.44 1.09 <br /> C. Pump selection <br /> 1. A pump must be selected to deliver at least <br /> �.�gpm (Step A) with at least �_feet of total head (Step B). <br /> �' <br />