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lv. iv. c.vir. nL•u vo.Lv rAA VLG.7YGJ1G4 UVUI�LHJ JIiI(CL'1V YIC11V7 l�G1L <br /> � PUMP SELECTION PROCEDURE Perio�ation Discharges fn gpm <br /> A.Determine pump capacity: perforotfon dlameter <br /> � head inches <br /> y ^_gravity distribution (feet) 1/8' 3/16 7/32 1/4 , <br /> ��-M i n i m u m r e q u ired dischar ge is 10 g pm � <br /> �. 1.Oa 0.1 8 0.4 2 0.5 6 0.7 4 <br /> 2 Maximum suggested discharge is 45 gpm <br /> pressure distribution 2•ob o.26 0.59 o.so t.04 <br /> see pressure design worksheeet 5.0 0.41 0.94 1.26 1,65 <br /> Selected pump capacity' �� gpm � �use 1.0 foot for sinple-tomily homes. <br /> b Use 2.0 feet tor onyttlEng else. <br /> ' Potenilal for plugging <br /> ; <br /> : . B. Determine head requirements: <br /> L Elevation difference between pump and point of discharge. <br /> ' �_feet <br /> 2 Special head requirement: <br /> If pumping to a pressure distriburion system, five feet for pressure <br /> required at manifold. If gravity system, zero.���feet soll heoiment <br /> 3.Friction loss system .�a�o: . <br /> a.Enter friction loss table with gpm and pipe diameter. - �ne � <br /> ' Read friction loss in feet per 100 feet from table. eievanon <br /> y;, Inlet dlfference <br /> " F.L. =L�� ft./100 ft of pipe �pe ------ <br /> ,... <br /> :.. <br /> ' b.Determine total pipe length from pump to discharge ������������ � <br /> --------------------•------- -•---- <br /> ' �point.Estimate by adding 25 percent to pi�length tor fitting <br /> �. loss.E uivalent pipe length times 1.25 =total pipe length <br /> ��� x 1.25.= � feet <br /> c.Calculate toh�l friction loss by multiplying friction loss Frictian Loss in Plastic Pipe <br /> ` in ft/100 h by equivalent pipe length. Per 100 teet <br /> �_ /•�� • ��feet -' r G norninal <br /> Total friction loss= �o x =100-" • - , pipe diameter <br /> � now rate 1.5" 2" 3�� <br /> 4.Total head required is the sum of elevation difference,special head m <br /> requirements,and to al friction lo s. 20 2.47 0.73 0.11 <br /> ,� <br /> �_+�-+ �1) �2) t�) 25 ; .. 3:73 ' 1.11 0:16 <br /> �": Total head: ____�._ fee �� _ so 5.zs �.� o.2s <br /> 35 6.96 2.06 0.30 <br /> - 40 ._ - 8.91 2.64 0.39 <br /> 45 11.07 3.2B 0.48 <br /> ` C. Purnp selection ,, 50 13.46 3.99 0.58 <br /> �5 4.76 0.70 <br /> ' 1.A pump must be selected to deliver at least;�gpm b0 5.60 0.82 <br /> (Step A)with at least�feet of total head (Step B). 65 6.48 0.95 <br /> - 70 7.44 1.09 <br /> i <br /> ��' <br /> _,;.� <br /> ���'; ! , � <br /> � � <br />