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_ _ i _ . <br /> �,,�-�c�-�-�_�- �1 �- <br /> � , <br /> F-17 <br /> PUMP SELECTION PROCEDURE <br /> EIJD PERFORATION OF A P£RFORATED L4TERAL <br /> A. Determine pump capacity: �.e..�.� <br /> Gravity Distribution T,o.,,, <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to s ay ahead of � - ' -�,,,�,N�.�.�,k�,,,a,- <br /> water use rate. .'�`m""5"°`°,�.. '""'"""°"'°'"."°'`a"'° <br /> af� .i,n na,n."n�1 <br /> 2. Maximum suggested for delivery to a drop box of a hom system is 2,700 .. _ ���^����-���_�^����r <br /> Mlo CAp Wo/ Top <br /> gallons per hour(45 gpm)to prevent build-up of pressur in drop box. �,,,.�,w '-., ��., ,Z•�o Ea,< <br /> � r.ie o�a«k�« <br /> . . . �� Prtero�lw Lowiw u� <br /> Pressure Distibution ����� B"'°"'°'`°'•"' <br /> 3.a. Select number of perforated laterals � <br /> b. Select perforation spacing= ? fee� �°��';,,°��„m""° <br /> c. Subtract 2 ft from the rock layer length. <br /> ��� -2 ft.= f^t1) feet <br /> w��ye�h <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing=l�ft.+ ? ft._ �-i7 spa es [t�quired Perforation Dischazge <br /> e. �_SpdCES+ 1 = J 1 perforations/lateral in gallons per minute(gpm) <br /> f. Multiply perforations per lateral by number of laterals to �� e , �, , <br /> et total number of rforations.� x a 1 y ��u H� 3z m �`` 4 m�'�'' <br /> g � �t��. �s ���-�� eI'fOldiloIlS. (feet) <br /> g. � X�=ti1 SP�- <br /> 1.Oa 0.56 0.74 <br /> SELECTED PUMP CAPACITY�2 gpm 2.D�j �.8Q 1.04 <br /> B.Determine head requirements: a. Use for single family homes <br /> 1. Elevation difference between pump and point of dischar e. b.Use for all other applications <br /> �O�"'���y ��feet <br /> (o� 2. If pumping to a pressure distribution system,five feet fo pressure <br /> ' required at manifold if gravity system,zero. <br /> S ��feet <br /> 3. Friction loss <br /> � �� a. Enter friction loss table with gpm and pipe diameter. r Pipe Leng[h <br /> ��- N� Read friction loss in feet per 100 feet from table. Poinc of Dis�harge <br /> F.L.= 3.� ft./100 ft of pipe TiDl. <br /> b. Determine total pipe length from pump to discharge Ele�aaon Difference1 <br /> point. Add 25 percent to pipe length for fitting p�P ti� <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> ) 3 0 x 1.25 =�_feet <br /> c. Calculate total friction loss by multiplying 1.5 inch 2.�D inch P.�0 inch <br /> �m Friaim loss 100 R oC i <br /> friction loss in ft/100 ft by equivalent pipe length. <br /> Total friction loss= � . S x_f L� 2 1100= feet 10 0.69 0.20 <br /> 12 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, 14 1.28 038 <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 /> �� `i + S� +__�� 25 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 5.23 1.SS 0.23 <br /> 35 7.90 2.06 030 <br /> 40 11.07 2.64 0.39 <br /> TOTAL HEAD �� feet 45 14.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> C. Pump selection bo s.bo o.a2 <br /> � 1. A pump must be selected to deliver at 1 st <br /> �'Z gpm �(Step A) with at least �feet of total ead (Step B). <br /> l <br /> I � <br />