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' - University of Minnesota Pump Selection Procedure - 10125/04 <br /> All boxed�ctangles must be entered,the rest will be calculated. <br /> OMs�,�e <br /> 1. Determine pumP capacity: T��,,.t <br /> A. Gravity Distribution P"�"""' <br /> 1.Minimum required discharge is 10 gpm <br /> 2.Ma�dmum suggested discharge is 45 gpm <br /> j For other establishments at least 10%greater than the water j j <br /> supply rate,but no faster than the rate at which efAuent will flow <br /> out of the distribution device. <br /> B. Pressure Distribution-see pressure desiyn worlcsheet �ou t`�t"�"T SY�re`T' <br /> &poinf of discharge <br /> 7:ki7i6t7 F131f.E1 <br /> Selected Pump Capacity: �gpm rorai�pe <br /> leng <br /> 2A.etevatlon <br /> 2. Det�mine Total Dynamic Head(TDH) inlet diiference <br /> Wpe ;: --- - - - ' <br /> A Elevation differerx�beM�een pump and point of discharge. ' ` <br /> , <br /> Ft.................... .. 1 <br /> 25 feet '• --------------------------- ------ <br /> B. Special head requirement?(See Figure-Special Head Requirements) <br /> �5 feet Special Head Requiremenis <br /> Gravity Distribution Oft <br /> C. Fricbon loss in supply pipe Pressure Distribution 5ft <br /> 1. Select pipe diameter �2 in <br /> 2. En�Fgure E-9 wiTh gpm(1A or B)and pipe diameter(C1) <br /> Read fiic1i�on loss in fcet 100 feet from Figure E-9 E-9 Friction Loss in Plastic Pipe <br /> c n <br /> Friction bss= 3.99 �/100 ft of pipe r 100 ft <br /> nominal <br /> 3.Determine total pipe length from pump discharge to soil system discharge point. Flow Rate i e diameter <br /> Estimate by adding 25 percent to pipe lengfh for friction bss in fittings. 1.5° 2.0" 3' <br /> Pi times 1.25=equivalent pipe length <br /> 275 ft x 1.25= 343.75 feet 25 . 3.73 1.11 0.16 , <br /> s �: _ <br /> 4.Cak,ulate total friction loss by multiplying friction loss(C2) 35 6.96 2.06 0.3 <br /> by tt�e equivalent pipe length(C3)and divide by 100. �k =��'�`_,.., ', , . ' �' <br /> Friction Loss= 3.99 ff/100ft X 343.75 ft / 100= 13.7 feet 45 11.07 3.28 0.48 <br /> �� �.��� '-��` � _�.. <br /> D. Total head requirement is the sum of elevabon difference(A),special 55 4.76 0.7 <br /> head requirements(B),and total fiction Ioss(C4). � �,;� . � �.��'°� <br /> 25 R + 5 ft + 14.0 ft �{65 6.48 0.95 <br /> :t"��u.'9 :��_ s {6 }� 1 <br /> +� Y 4 � G <br /> Total Head: 44.0 feet <br /> 3. Pump Selection <br /> 1.A pump must be selected to deliver at least 50 gpm(1A or B) <br /> with at least 44.0 feet of total head(2D . <br /> I hereby certify that I have completed this work in accordance with all applicable ordinances,rules and laws. <br /> (signature) 810 (license#) 8/1/2006 Date <br /> Page 1 of 1 <br />