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F-17 <br /> ; ��.�, <br /> :���t' p�TMP SELECITON PROCEDURE <br /> EJD PERFOR4TION CF A P£RFORATEU LATEfi4L <br /> A. Determine pump capacity: �•a•.�.•, <br /> Gravity Distribution T,a,,, <br /> 1. Minimum suggested is 600 gallons per hour(70 gpm) to stay ahead of - ,.. � ' ,,�„» �,�„k c���- <br /> water use rate. �'' `�"5"°`""` :'`��,•.:.;"',�..;"°'`a"'° <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 , . ��«•��^���� ��_�^�^��* <br /> tiro Gev wor ioo <br /> gallons per hour(45 gpm)to pre��ent build-up of pressure in drop box. r.,,•R,„ d .: _�pIX���H,ea,. <br /> _ .... ._ � P.�,a.mbn.�ltt ib a� <br /> Pressure Distibution -�;����� �""'^"�°'•"' <br /> 3.a. Select number of perforated laterals 3 <br /> ? onr.w sen ►rw.nr sw�rw <br /> b. Select perforation spacing= feet �.,,,,p„�,,,5,,,,�,,,, <br /> c. Subtract 2 ft from the rock layer length. <br /> �� �-2ft.= '.'_- feet <br /> d. Dete�rnune the number of spaces bet�veen perforations. <br /> Lengtti �.SF?dCiT1g= L�� ft.+ � ft._ � �� spaces Reyuimd Perforation D��chug e <br /> e. �� spaces+ 1 = �� perforations/lateral ' ui gallons per minute(gpm) <br /> ' f. Multiply perforations per lateral by�number of laterals to '��e � m�� � �� <br /> get total number of perforations. �,�„�� x �-��= L�i perforations. �f��� 3Z ' °� <br /> g' � X arP w+-�_gPm• �� . <br /> ��.. �� 1.Oa 0.56 0.74 <br /> SELECTED PUMP CAPACITYr�r9---gP� �.��� 2.Ob 0.80 1.04 � <br /> B.Determine head requuements: !-•�' a.Use for single family homes <br /> 1. Elevation difference between pump and point of dixharge. 3 b.Use for all other applications <br /> �_feet <br /> ;�;,,. , 2. If pumping to a pressure distribution system,five feet for pres <br /> �' required at manifold if gravity system,zera � I/ -� �` <br /> � feet ( ��� <br /> � 3. Friction loss <br /> � a. Enter friction loss table with gpm and pipe diameter. �,�� Pipc Lengch <br /> Read friction loss in feet per 100 feet from table. � � Poinc of D'uchar c <br /> F.L._ �.L� ft./100 ft of pipe -!oo E� <br /> b. Determine total pipe]ength hom pump to discharge Elevation Difference <br /> poinL Add 25 percent to pipe length for fitting p�,P _ JoD l:o <br /> loss,or use a 6tting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> 4t�t x 1.25= /d o feet <br /> c. Calculate total friction loss b multi 1 n 1.5 inch 2.�inch 3.0 inch <br /> Y P Y� g �m friaim loa pc]00 R of pipe <br /> friction loss in ft/100 h by equivalent pipe length. <br /> Total friction loss= �� . !< x /n u +100=�_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 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 O.11 <br /> �_+ � +�_ 25 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 5.23 1.55 0.23 <br /> 35 7.90 2.06 030 <br /> 40 11.07 2.64 039 <br /> TOTAL HEAD I.S feet � 45 14.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> C. Pump selection bo s.so o.s <br /> `'��- 1. A pump must be selected to deliver at least <br /> "��.^ �`� gpm (Step A) with at least �feeE of total head (Step B). <br />