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67/21/2604 14:01 3262382343 HENTGES PAGE 11/1�4 <br /> PUMP SEl.EC710N PR�CEDURE <br /> A. Pump cap�cfty <br /> Already determined f�om PRESSURE DISTRIBUTION PAGE, line#7 <br /> Pump cap�city = � 35 GPM <br /> "* Pump capacity should be between 20 and 4p GPM far charging a manifold <br /> ar for pumping to a gravity situation, ie, a drop box or distribu#ion box. <br /> B. Determine h��d requirements <br /> 1. Elevation diffe�ence between pump �nd the paint of discharge = '�fl <br /> 2, If pumping to a pressure distribution system, �dd 5 feet af head required at the <br /> m�nifold. If pumping to a gravity syst�m, use zero (0} feet of head. � <br /> 3. Determi�e friction loss <br /> a. Enter fric#fon loss table with gprn 35.3 and pipe diam�ter 2,a <br /> FRICTION L083 IN PIASTIC PIP� <br /> F1.OW RATE NOMINAL P1PE DIAMETER FLOW RATE OMINAI. PIPE DIAM�TER <br /> !N GPM 1.5 2 3 1N GPM 1.5 2 3 <br /> 2p 2.47 0.73 D.11 35 6.96 2,08 0•30 <br /> 25 g,73 1.11 0.18 4Q 8.91 2.84 0.38 <br /> 3p 5,23 1.55 0.23 45 11.07 3.28 0.48 <br /> Friction iass = 2.06 feet per 100 ft of pipe <br /> b. Determine tot�l pipe length from pump to discharge paint = 4p.t� <br /> Add 25% ta pipe tength above to accaunt for�itting loss � 50.0 „#eet pipe <br /> �. Calculate tatal friction foss by multiplying friction loss in ft/10Q B3a by <br /> equivafent pipe length B3b above = <br /> 2.06 X 50_00 equals 103.�0 / 100 = 1.0 ft head <br /> � <br /> C. Tota1 head required is the sum of the elevaiion differenca B1 plus additional pressure <br /> for the manifold B2 plus the totaf friction loss 3Bc. <br /> 10.0._ pius 5.0 plus 1.0 equals 16.0 ft total head <br /> D. The Pump requir�s 35.3 gpm and 16.0 feet of head <br /> PAGE 9 OF 12 <br />