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, • , ` ; <br /> � . <br /> F-17 <br /> � • <br /> p�JMP SELECTION PROCEDURE <br /> � F!D PERFORATION OF G PERFOR4TEp LaTEn'el <br /> A. Determine p p capacity: c.a.v.., <br /> Gravity Distribu�ion T,a,,,, '"� <br /> 1. Minimum 5uggested is 600 gallons per hour(]0 gpm)to stay ahead of _ • - � <br /> /�La,.,al c«»n.4 FaO.�c lor,u,- <br /> .�' lsan7 SYW laM� / YrA 1s�H bf w nro.cwwW <br /> water use nate. - - /,' Nr��y ryy�papu) <br /> 2. Maximum�uggested for delivery to a drop box of a home system is 2,700 ._ . �"������»a��=����a <br /> N»�,..e, .� <br /> gallons per hour(45 gpm)to pre�ent build-up of pressure in drop box. ��,•��a �-o R«��,«°`°°' <br /> � w+..ai.�.�u�.�«o� <br /> PresSure Distibu on c�..�s4,a�„� �"�^°'U�..�, <br /> 3.a. Select num r of perforated laterals 3 <br /> b. Select perf tion spacing=�_feet ���py��P���a��f� <br /> B�Ir� <br /> c. Sub!traj�2 f from the rock layer length. <br /> ��-'2 ft._�_feet <br /> d. Det rnune�he number of spaces between perforations. <br /> Length'� perf.spacing=,�ft.+ 3 ft._�spaces Required Perforation Lhsch e <br /> e. �spaces i+ 1 =��perforations/lateral �+S�o�P��T+��e�� <br /> f. Muldply pej�foradons per lateral by number of laterals to ��8e � m� , <br /> get total nu�ber of perforations. �;� x �,=��Q,,_ �_perforations. x�a �Z � s°"�w+ <br /> g• � X '��„`P„}_ `--�-�SPa'• <br /> 1.Oa 0.56 0.74 <br /> SE�.EC'TED PUMP CAPACITY 4 0 gpm 2.�b �.8� 1.�4 <br /> B.Determine head ilequirements: a. Use for single family homes <br /> 1. Elevation di�ference between pump and point of discharge. b.Use for all other applications <br /> �_feet <br /> 2. If pumping tp a pressure distriburion system,five feet for pressure <br /> required at r�anifold if gravity system,zero. <br /> � S� feet <br /> 3. Friction loss'' <br /> a. Enter friction loss table with gpm and pipe diameter. � Pipe Lrngch <br /> Read friction loss in feet per 100 feet from table. ` Point of Discharge <br /> F.L._�_ft./100 ft of pipe io y <br /> b. Deterrnine total pipe length from pump to discharge Ele�adon Difference� <br /> point. Add�percent to pipe length for fitting �p� � <br /> loss,or use a fitting loss chart. Equivalent pipe P <br /> length-1.�5 times pipe length= <br /> � �1 U x 1.25 = 1 1� feet F-18b <br /> c. Calculate otal friction loss b multi 1 n 1.5 inch 2.0 inch 3.0 inch <br /> Y p r s �m friaim los�per]00 R of pipe <br /> friction lo9s in ft/100 h by equivalent pipe length. <br /> Tota l f r ic tion ss= �. � x l 1� +100= fee t 10 0.69 0.20 <br /> � --��-- -�- 12 0.96 0.28 <br /> 4. Total head rec�uired is the sum of elevation difference, la 1.28 038 <br /> specia l hea d nequirements,an d tota l friction loss. 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> 20 2.47 0.73 0.11 <br /> � 1'�. + s + 3 25 3.73 1.11 O.l 6 <br /> ! (1) (2) (3�) 30 5.23 1.55 0.23 <br /> 35 7.90 2.a6 0.?0 <br /> 40 11.07 2.64 0.39 <br /> TO?AL HEAD a� feet 45 14.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> G Pump selectiom bo s.bo o.s2 <br /> 1. A pump must be selected to deliver at least <br /> ��� gg�m (Step A)with at least a D feet of total head(Step B). <br />