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11�1Of'LbbS 1�:�y �1b1�S2343 HEM'GES PAGE 13 <br /> . . PUMP SELECTION PROCEDURE <br /> A. Pump capaci�r <br /> i <br /> . Pump capaci�► = 25 GPM <br /> � " Select a pump capacity between 20 and 40 GPM for charging a ma�ifold <br /> or(or pumping to a graviiy�ituation, ie, a drop box or distribution box. <br /> B. Oeterrr�ine he�d requirements � <br /> 1. Elevatio� ditference betw0en pump and the point of discharge = 10 <br /> 2. If pumping !o a pressure distribution system, add 5 feet of head required at the <br /> m�nifold. If pumping to a gravity system, use zero (0) feet of head. � <br /> I �3. Determine frietion loss <br /> a. Enter friction loss t�ble with gpm 25,p and pipe diameter 2.0 <br /> �__ <br /> ��criorr i.oss iN pu��rc P�� <br /> R�O'W RA� NOAANAL RPE D1q1yETER Fl.OW RATE OMINAL PIP� DW�TER <br /> IN CPM 7 2 3 IN GhAA t.5 2 3 <br /> � 2��7 Qt9 0.11 36 8,96 2.� 0,90 <br /> 2S 3.73 7.11 0.16 40 &91 2,8�4 0.38 <br /> � 5�23 1.55 0,�'J 45 11.07 3,28 O.�B <br /> Fric6ion loss = 1.11 feet per 100 ft of pipe <br /> b. Determine toial pipe lengtl� from pump to discharge point = 75.0 <br /> A�dd 25°� to pipe length above to account for ftting loss = 93.8 feet pipe <br /> c. Calculafe tot81 fricfion loss by multiplying fi-iction loss in ffi/100 B3a by <br /> equivalent pipe Iength B3b above = <br /> „�11 X 93.75 equals 104.06 / 100 = 1.0 ft �ead I <br /> C, 7otsl head required ts the sum of the elevation di�erence B1 plus additional pressur� <br /> for the manifold B2 plus the total friction loss 38c. <br /> �� P�u$ __ plus 1.0 equals 1�R totaJ head <br /> D. The Pump requires 25.0 _gpm and 11.0 feet of head � <br /> PAGE 10 OF 10 <br /> I <br /> El 'd Z6l 'ON hNddWO� 1���38Nd4 WdlO � l l SOOZ '8 '�34 <br />