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University of Minnesota Pump Sele�tion Procedure - 10125104 <br /> Ail boxed rectangles must be�tefed,tlre rest will be cakxilated. � <br /> Oas�,� <br /> saMu►oe <br /> 1. D�rmina pump capacit�►: �rw�P�� <br /> A. Gravity Di�Uibutlon <br /> 1.Minimum required discha�ge is 10 gpm <br /> 2.Maximum su�sted discharge is 45 gpm <br /> For otl�establishments at least 10%greater than the water <br /> supply rate,but no faster lhan the rate at which effluent will flow <br /> out of the distribution device. <br /> B. Pressure Distribution-see re n worksheet So��r�@ar�-e�•+svst� <br /> P� �� &p nt of discharye <br /> P aP��Y� C� totol F:pe T <br /> Seleded Pum C � 9Pm sengrr � <br /> ..�..�. 2A,elevotion' <br /> iniet di(ferencel <br /> 2. DeNrmine Total Dynamic Head(TDH) p oe `` , <br /> � ;;f�� ^ <br /> A. Eleva6on d�fererwe between pump and point of disc;harge. �' { <br /> f:i� E��.- - - - - -- --...-----.1.._.. <br /> (u��t i��' .�.��»�:t,� <br /> �---�--� <br /> g, Special head requirement?(See Figure-Special Head Requirements) <br /> C5��t ' Head Re uireme�ts <br /> �,�as,��, o� <br /> C. Fric�on bss in supply pipe Pressure Distribution 5ft <br /> 1. Se�t pipe diameter �in <br /> 2. En�Figure E-9 with�m(1A or B)�d pipe diametPr(C1 j <br /> Re�d iridia�los.s in feet 100 feet irom Figure E-9 E-9 Fric�n Lass in Plsadc Pipe <br /> Fric�on bss= 2.64 ft/100 R of pipe 400 R <br /> nominal <br /> 3.Debrtnine b�p�e lengfh from pump discharge to sal syste�n discharge point. Flow Rate ' diameter <br /> Es6ma�by adding 25 peroent b ppe length for fric�ion bss in fittings. 1.5' 2.0" 3" <br /> �hm�1.25=equiwdlent pipe length 2� • : �;-: O,T3 0.11 <br /> ft x 1.25= 382.5 feet 25 3 73 1.11 0.16 <br /> 30 5.2,3 1.55 0.23 <br /> 4.Cakxrlate b�tal iriction bss by multi'pllying fiiction loss(C2) 35 6.96 2.06 0.3 <br /> by the equivalent pipe length(C3)and divide by 100. 40 8.91 2.64 0.39 <br /> Friction Loss= 2.64 ft/100R X 382.5 ft I 100= 10.1 feet 45 11.07 3.28 0.48 <br /> 50 13A6 3.99 0.56 <br /> D. Tofal head requirement is the sum of elevation difference(A),speaal 55 4.76 0.7 <br /> head requirements(B),and total fric6on loss(C4). 60 5.6 0.82 <br /> 36 ft + 5 ft + 11.0 ft 65 6.48 0.95 <br /> 7U 7.44 1.09 <br /> Total Head: 52.0 feet <br /> 3. Pump Selection <br /> 1.A pump must be selected to deliver at least 38 gpm(1A or B) <br /> with at least 52.0 feet of total head(2D). <br /> I hereby oe�tify that I have oanpleted this work in a000rdanoe with�I applic�le ordinances,rules and laws. <br /> f� (signature) 810 (license#) ,:}��� � 5 {date) <br /> Page 1 of 1 <br />