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F-17 <br /> �-�:J Y[_T_MP SELECTION PROCEDL�E <br /> ,.�„ _ <br /> EM PERFORATION OF 4 PERFORA7ED L�TE'nGL <br /> A. Defeimine pump capadty: �-�« <br /> GraviEy Disfribution T.,.� 1�,, <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of = '�:. � � . ,��»R��,k�,,,,,. <br /> waber use rate. '.�•�,�°�••� :'�b,.«��,..�..... <br /> 'w�..b,.... <br /> 2 Maximum suggested for delivery to a drop box of a home system is 2,700 ., . •-^�+-�������^�-� <br /> , .,a te.,�... �. <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. _.,;p,,, ;_.,�.,., ,_-,..�;. <br /> ie er a�a� <br /> _ ::�::.. �.. . v.reierwn uu�d.� <br /> Pressare Distibutian " ' : c�••�s�•� �'"°"'«`"•••� <br /> 3_a. Select number of perforated laterals 3 <br /> b. Select perforation spacing=�_feet °''"'°'�°" ''�°"��'"° <br /> e«..►�.s�e�.. <br /> " c Subtract 2 ft from the rock layer length. <br /> ���-2 ft= �� fee� . <br /> d. Deteraune the number of spaces bet�veen perforations. <br /> I,ertgth perf.spacing=�?�ft.+3_ft.=1�SpaCes Required Perforationp�,�e <br /> e. ,�,spaces+1=_J�perforatioas/lateral �8��P����e�BPmf <br /> f. Multiply perforations per lateral by number of laterals to '�`aBe �Z��,r j ma� <br /> get total number of perforations. � x �,.1�Q,,_��perforations. �f��> <br /> � `�s X ,a-��'„�_�gp�- . . <br /> 1.Oa 0.56 4 <br /> SELECT'ED PUMP CAPACITY a�7 gpm 2.�b �.8� 1.�4 <br /> B_Determine head requirements: a.Use for single family homes <br /> 1. F�evation difference between pump and point of discharge. b.Use for all other applications <br /> feet <br /> ��.� 2. If pumping to a pressure distn ution system,five feet for pressure <br /> required at manifold if gravity s��stem,zero. <br /> S feet <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. , Pip�I-a►B�h <br /> Read friction loss in feet per 100 feet from table. Poinc of Discharge <br /> F.L= �• � ft/100 ft of pipe q� <br /> b. Determine total pipe length from pump to dischazge E1e�aaon Differrncc� <br /> point Add 25 percent to pipe length for fitting p,u„ -6b <br /> loss,or use a fitting loss chart. Equivalent pipe p <br /> _ length-1.?5 times pipe length= <br /> _�Z x 1.25=�_feet F-18b <br /> c. Calcvlate total friction loss b multi 1 n 1.5 inch 2.0 inch 3.0 inch <br /> Y P Yi g g� Friaim lm pa 100 ft of pipe <br /> friction loss in ft/100 ft by equivale�pipe length. 10 0.69 0.20 <br /> ' Total friction loss= �_x /• S +100=�_feet 12 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, 14 1.28 0.38 <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 /> _�+ � +� 25 3.73 1.11 0.16 <br /> (1) (2) (3c) ..�_5.23___ 1.55 0.23 <br /> 35 7.90 2:06- 0.30 <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 /> G Pump selection bo s� 0 8i <br /> �x 1. A pump must be selected to deliver at least <br /> :-r�' �gpm (Step A)with at least 1 � feet of total head(Step B). <br />