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' ' PUMP SELEC'TION PROCEDURE <br /> A. Determine pump capacity: <br /> C' Gravity Distribution �o a��oRariow oF a �oRarEn �ATERAL <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of �a,„�,,,„ <br /> water use rate. ` ��- <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 ��`w�� -�"� <br /> Sallons r hour(45 m)to revent build-u of ressure in dro box. ``,;, �,�� , `Y`����r cro�..u�. fobrk (a fw- <br /> Pe gP P P P P � ,� q.,o��Y a N,o.,��,�..a <br /> .�.:M�n Ra .o.�o pape�� <br /> e Palaotbn Drllled Horizonlolly <br /> Pressure Distribution • ���� o ►�a� �a <br /> 3. a. Select number of perforated laterals 3 '�:�+w � ��� 1z'�a �a• <br /> �a, FNIC qak �� 01 Rock tnyer <br /> b. Select perforation spacing=�_ft. ' `"P„,wu,ion:'►.oco�.a c� <br /> c Sub ract 2 ft.from the rock layer length. � c,w�s�,a w„�, 8o11q1�� ��•,,, <br /> �-2ft.=�cZft. <br /> aki�i son r�o�i� s�«mw <br /> BHon Plockp Sand Loyer <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing=,�_ft.+�ft._ �'� spaces <br /> TABLE OF PERFORATTON DISCHARGES IN GPM <br /> e. �1Z spaces+1=�perforations/lateral <br /> ' f. Multiply perforations per lateral by number of laterals to Head PerforaHon diameter(inches) <br /> get total nu ber of perforations. , ,� � <br /> �y�� x � ��_��perforations.�13� " �� <br /> �.oa o.sb a�a <br /> �d4 .S�L 7S 0.69 0.90 <br /> g' ._':�� x sTv�*r-�gPm• z.ob o.so �.oa <br /> 2S 0.89 1.17 <br /> SELECfED PUMP CAPACITY m 3.0 0.98 t.28 <br /> �gp 4.0 ].13 1.47 <br /> 5.0 ].26 1.65 <br /> B.Determine head requirements: <br /> ]. Elevation difference between um and iitt of dischar e. aUse lA foot of head for residential systems. <br /> � p � b' bUse 2A feet of head for other establ'uhments <br /> �_feet <br /> 2. If pumping to a pressure distribution system,add five feet for pressure <br /> required at manifold <br /> _ �feet <br /> 3. FriCtiOn lOss Pipe Lengch <br /> f ; <br /> a. Enter friction loss table with gpm and pipe diameter. Poin�of Discharge <br /> Read friction loss in feet per 100 feet from table. '1�a; <br /> F.L. = 3. � ft./100 ft of pipe Elevation Difference <br /> b. Determine total pipe length from pump to discharge p„n,p �� � <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitHng loss chart. Equivalent pipe F-18b <br /> length-1.25 times pipe length= 1.5 inch 2.0 inch 3.0 inch <br /> _L_L_s�X 1.�J= 13� f�ft gpm Friaion toss per 100 ft otpipe <br /> c. Calculate total friction loss by multiplying l0 0.69 0.20 <br /> friction]oss in ft/100 ft by equivalent pipe length. 12 0.96 0.28 <br /> Total fricHon loss= 3� x ►��{ +]00= ��feet 14 1.28 0.38 <br /> 4. Total head required is the sum of elevation diffcrcn�c, l6 1.63 0.48 <br /> 18 2.03 U.60 <br /> spccia] head requirements,and total friction]oss. 20 2.47 0.73 0.11 <br /> 25 3.73 1.11 0.16 <br /> �_+�_.���_ 30 5.23 1.55 0.23 <br /> (1) (2) ;3c) 35 7.90 2.06 0.30 <br /> 40 11.07 2.64 0.39 <br /> 45 14.73 3.28 0.48 <br /> TOTAL HEAD . l � feet 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> 60 5.60 0.82 <br /> , C. Pump selection <br /> 1. A pump must be selected to deliver at least�� gpm (Step A) <br /> with at leas��� feet of total head (Step B). <br />