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' ' Univer�ity of Minnesota Pump Selection Procedure - 10125J04 <br /> AI�boxed rec�gles rrwst be encered,the r�est wi�be c�a,�ated. <br /> o.+�� <br /> 1. Determine pump capacity: �►w:.H. .� <br /> a Gra�►ity oistributbn '"�"""" <br /> 1.Minuruim required d�scharge is 10 gprn <br /> � 2 Ma�dnnan sugge�d d�harge�45 gpm � � <br /> i Fa olher�Is at least 10%�tl�an ihe waber � � <br /> supply ra�e,but rw faster th�the ra�e at which eflluent will flow <br /> out of tl�e distrbution devioe. <br /> B, ��g��U�O�-S��fCS,SUf@ d8S19�WO�kShP�t soil ireatment system <br /> &point of discharge <br /> ;::� ..�: <br /> Se18Cted Pump CaPaC�h►: �9Pm Ien�Ith�Pe <br /> 9 <br /> 2A.eievation <br /> iNet difference <br /> 2. Debe�mine Tatal Dynamic Head(TDH) p�pe <br /> :s - --- - � <br /> A Elevation dii�erence between�mp and point of discharge. :: : <br /> : <br /> .. _.. _...... , <br /> ��� --------------------------- ------ <br /> B. Special head�quirernent?(See F'rgwe-Speaal Head Requir+ements) <br /> ��{ Special Head Requirements <br /> Gravity Distribution Oft <br /> C. F�bss in suPP�Y P�Pe Pressure Distribution 5ft <br /> 1. Selec�pipe diameter �in <br /> 2. Enfier Figure E-9 with 9Pm(1A or B)and p�e diameter(C1) <br /> Read fric6on loss in�eet 100 feet from F'gure E-9 E-9 Friction Loss in Plaatic Pipe <br /> F�los� 4.76 ft/100 ft of pipe 100 ft <br /> nominal <br /> 3.De�ermir�e to�pipe length from pumP disd�arge to soil sysbem disch�ge pant Fbw Rate �i e di�neter <br /> Estrnate by adding 25 Peroent to piPe length for iric6on loss in fittings. 1.5' 2.0' 3' <br /> Pi times 1.25=equivalent piPe le� < :.;, . �1i!'� �' <br /> 150 ft x 1.25= 187.5 feet 25 3.73 1.11 0.16 <br /> h3p °�''� ,:�,.r 0.23 <br /> 4.Ca�ulabe bot�iriction loss by multiplying firic�on bss(C2) 35 � 6.96 2.06 0.3 <br /> by the equivalent piPe len9th(C3)and divide by 100. 40 8.91 � ' 0.39 <br /> Frid'an Loss= 4.76 ft1100ft X 187.5 ft / 100= 8.9 feet 45 11.07 3.28 0.48 <br /> �0' 1�.�'x =.���: 0.56 <br /> D. Total head requirement is the sum of elevation difference(A),spec;ial 55 4.76 0.7 <br /> head requirements(6),and total iric:tion loss(C4). 64. _ ��B 0.81 <br /> 0 � + 5 ft + 9.0 ft 65 6.48 0.95 <br /> 70 7.44 ' 'f.09 <br /> Total Flead: 14.0 feet <br /> 3. Pump Selactlon <br /> 1.A pump must be selec�d to deliver at least 53 gpm(1A or B) <br /> witli at least 14.0 feet of tot�head 2D). <br /> I hereby oefify ihat I have completed�is work in a000rdanoe with all�plic�ble ordinanoes,rules and laws. <br /> signature) 810 (license#) 7/13/07 (Date) <br /> Page 1 of 1 <br />