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�UMP �ELEC'T10N��x���,xL <br /> A. Determine pump capacity: <br /> Gravity Uistribution <br /> 7 Minimum suggestcd iti 2O��,m + <br /> 2 Ma�imum sug�ested i�45 �J�ni <br /> Pcrfontion DischarRes in GI'�1 <br /> 11rad 1'rr(�iriUiin diameti�� <br /> I'rctitiur�� Uistlbulion (tcrt) inrh��ti) <br /> � .�. tirle�rt numberof perforatrd I.itrr.�l� _ __ _ _ 7/3� t/a <br /> h tic�l��ct perforation spacin�; _ _ _ feet. <br /> t a, o.5r; a_�a <br /> � �ubtract 2 ft. from thc rocl. layrr Irn};th 1.5 ���,y ��yi� <br /> N.���.,,•��,.�,,n-2 ft. = feet. 2.ob o.sn �_oa <br /> �j. �.�CI�rLIl1I1(ffle I1ll1T1�7Cf Oj S�7diC'� ht'iN�l'CIl }�CffOC3l1011ti_ 3 UsP 1.11 Iui�1 tiin};li�I��imi�, <br /> �_t'Il�;�l �EIf. S�JaC1Il� _ __ }L - ---- �L = ---SpICCti ���kr�'.11 I�'i•1 lur.�m'l�i�nh rl>r. <br /> �� _. _ <paces + 1 = _ perforations/lateral <br /> f_ Multiply per(orations per laterai by number of laterals to <br /> �et total number of perforations_ �_ x ���_ _p�rforations. <br /> � - <br /> � x ��--gpm. <br /> SELECTED PUMP CAPACITY gpn, <br /> B. Uetermine head requirements: <br /> 1. Elevation difference bet�a�een pump and point of discharge. <br /> feet <br /> 2. If pumping to a pressure distributi�,n s��stem, five feet for pre�sur�� �� �. �.��.�,��.,.�,. <br /> rc�c�uired aY manifold if gra��ity ����tcm, zer��. r.,.—�,.-a <br /> -�- - <br /> �; <br /> ---- __ t�:ci ���.. , „ , ,- ' <br /> � Friction loss � <br /> a. Enter fnction loss table with gpm and pipe diameter. w<< ,- -- <br /> FJevahon Diftrrt•ncc /�` <br /> Read friction loss in feet per 100 feet from table(F-14). �"� �� i <br /> F.L. = ft./100 ft of pipe � " - � t <br /> � • : <br /> b. Determine total pipe length from ptimp to discharge �--��----------- -- - <br /> point. Estimate by adding?5 percent to pipe length for fitting <br /> loss,or use a fitting loss chart (F-15 feet). <br /> Equivalent pipe length- 125 tirnes pipe length- <br /> x 1.25 = feet <br /> c. Calculate total friction loss by multiplying Friction Loss in Plastic Pipe <br /> friction loss in ft/100 ft by equivalent pipe length. Nominal <br /> Total fricrion loss = � x �100= feet p�pe dia <br /> 4 Total head requued is the sum of elevation difference, Flow Rate 1.5" 2" 3" <br /> special head requirements, and total friction loss. gPm <br /> 20 2.47 0.7_, 0.11 <br /> + + 25 3.73 l.11 0.16 <br /> �l� (?) (3c) 30 5.23 1.55 0?3 <br /> 35 6.96 2.�6 030 <br /> TOTAL HEA1_� feet �� 5.91 2.ba U 3y <br /> _ _ — 45 11 0" 3?� U•aR <br /> _ 50 ]�_4n 3_�l�e (I.?ti <br /> (�. Pump selection '�� a ��, i��c� <br /> h(1 :nl; t?�:' <br /> �� �4� 0 y� <br /> -�-�------ 70 7 4-a ] ll9 <br /> --- - --_— <br /> i -- ------- <br /> � 1. A pump must be selected to deliver at least <br /> � gpm (Step A) with at least feet of total head (Step B). <br /> � <br /> i <br />