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PUMP SELECTION PROCEDURE <br /> A. Determine pump capacity.- <br /> Gravity Distribution 00 POWOWM OF a PERFORATO LATOM <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of aw.ew <br /> water use rate. ffL Two <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 <br /> ►'"' of OaNwIM IR ta.• <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. sew ur.. •^`�".,.,«�.,. «..« <br /> h►IW too are IMYMeeN� <br /> Pressure Distribution �"' MW <br /> 3. a. Select number of perforated laterals. � '�• "'Low Ora a• <br /> .�a.a Ln« <br /> b. Select perforation spacing=�_ft. ;;` Pwrww*"Lnn e M <br /> �r. : Mlw.N wa.« <br /> C. Subtsra�2 ft.from the rock layer length. �;;,.:, caw�+�« <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing= L ft.+�ft._� spaces TAe►B oP PeRt+o�►�r M tOulecea w cast <br /> e. �spaces+1= P per Fos <br /> f. Multiply perforations per lateral by number of laterals to Hmd Pafctatbe di moW Om4m) <br /> SW total n /" 14aumber of perforations. ' <br /> x �_ L perforations. ' <br /> ".�G"' lAA ' 036 0.74 <br /> 8• W;;57x _. $P� ]2.A0b oo eo i o <br /> 2.3 Os9 137 <br /> TED PUMP CAPACITY m 3A o.9s 1.28 <br /> SELEC <br /> -�`�-8P 4.0 1.13 1 a7 <br /> SA 1.26 IAS <br /> B.Determine head requirements: avec]A foot of Bead �eaidentW <br /> /--",J. Elevation difference between pump and point of discharge, Mae 2A fed of had for COW abb its <br /> Z� I 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 Lmo <br /> a. Enter friction loss table with gpm and pipe diameter. PointoFDImhwV <br /> Read friction loss in feet per 100 feet from table. 9 <br /> F.L.= a, �a ft./100 ft of pipeElevadon Difference <br /> b. Determine total pipe length from pump to discharge EIZOM1111111P gs� <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitting loss chart. Equivalent pipe _P-18b <br /> length-1.25 times pipe length= <br /> l 7 D x 1.25=�Z 1.5 inch 2A inch �inch <br /> feet PM PMaloe taw per tao a d <br /> c. Calculate total friction loss by multiplying <br /> friction loss in R/100 ft by equivalent pipe length. 12 0.96 20 <br /> 96 0. <br /> Total friction loss= a.to x a -A +,100=_gi feet 14 1.28 0.38 <br /> 4. Total head required is the sum of elevation difference, 16 1.63 0.48 <br /> irements,and total friction loss. 18 2.03 0.60 <br /> special had requirements, 20 2.47 0.73 0.11 <br /> 25 3.73 1.11 0.16 <br /> + ti +_�_ 30 5.23 13S 0.23 <br /> (1) (2) (3c1 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 _het SO 3.99 O.S8 <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 least za- ,•feet of total head(Step B). <br />