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i � • <br /> F-17 <br /> P[_TMP SELECTION PRQCEDL�E <br /> �ErD PERFORATION OF p PERFORA7ED LA7Eiial <br /> A. Determine pump capacity: �-�« <br /> Gravity Distribution � <br /> Tp.«� <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm) to stay ahead of - :: • ,,�,,,,�w F,,,k,,,,,,. <br /> water use rate. '�"""s°"°`". ''�,�,«'.�,�-;"'`..."° <br /> 2. Maximum suggested delivery to a drop box of a home system is 2,700 ._ .. ""�3-��,.d","°"°"`°"�°", <br /> gallons per ho 5 m prevent build-up of pressure in drop box. . �,,•R,„a .: -� R«;����e Eap. <br /> P..��,»�.�.,b ,� <br /> Pressure Distibution ��^�e*� �"""'«`•'."' <br /> 3.a. Select number of perforated laterals - <br /> b. Select perforation spacing= - feet �'�,«;;,.'��,:"'"° <br /> c. Subtract 2 ft from the rock layer length. <br /> �� �-2ft.= - feet <br /> d. Deternune the number of spaces between perforations. <br /> L.ength perf.spacing= _ ft.+ � ft._- spaces Reyuired Perforatlon Discharge <br /> 2. - SF3dCe5+ 1 = � PPSfOIdti0I1S/IdtC1d1 in gallons per aunute(gpm) <br /> f. Muldply perforations per lateral by number of laterals to �`dSe � m �, � „d,� <br /> ppt total number of�p rforadons. - x -' - nerforations. 32 a 'a <br /> p� r' l+�.ra�. pens �cal- � t' (feet) <br /> g• � x�-�_ - gPm. <br /> 1.Oa 0.56 0.74 <br /> SELECTED PUMP CAPACITY '��gpm MkX- 2.�b �.8� 1.�4 <br /> B.Determine head requirements: a.Use for single family homes <br /> 1. Elevation difference between pump and point of discharge. b.Use for all other appl�cations <br /> 31 feet <br /> 2. If pumping to a pressure distribudon system,five feet for pressure <br /> required at manifold if gravity system,zer�. <br /> - feet <br /> 3. Fricdon loss <br /> a. Enter friction loss table with gpm and pipe diameter. Pipe Lrngth <br /> Read friction loss in feet per 100 feet from table. � Point of Dischargc <br /> F.L._���ft./100 ft of pipe T ��I <br /> b. Deternvne total pipe length from pump to discharge Elevation Differencei <br /> point. Add 25 percent to pipe length for fitting p�P ;�� <br /> ]oss,or use a fitting loss chart. Equivalent pipe <br /> length-1.25 times pipe length= F-18b <br /> l �d v x 1.25 = �.� feet <br /> 1.5 inch 2.0 inch 3.0 inch <br /> c. Calculate total friction loss by multiplying �m Fnaim lau per IOOR o(pipc <br /> friction loss in ft/100 ft by equivalent pipe length. l0 0.69 0.20 <br /> Total friction loss= 3 ��.K x ��S +100=_Z_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 /> 3 � + - +�_ 25 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 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 34� feet 45 14.73 �3.28 0.48 <br /> 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> C. Pump selection 6o s.6o o.sz <br /> 1. A pump must be selected to deliver at least <br /> �S gpm (Step A) with at least ��S feet of total head (Step B). <br /> rn��. <br />