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� ' University of Minnesota Pump Selection Procedure - 10/25/04 <br /> All boxed rectangles must be entered,t�e rest will be calculated. <br /> o«:�,-e <br /> 1. Determine pump capacity: -Sr��� <br /> PROORAM <br /> A. Gravity Distribution <br /> 1.Minimum required discharge is 10 gpm <br /> , 2 Ma�dmum suggested discharge is 45 gpm � <br /> � For other establishments at least 10°�greater than the water j i <br /> supply rate,but no faster than tfie rate at which effluent will flow <br /> out of t�e distribution device. <br /> B. Pressure Distribution-see ressure desi n worlcsheet , soll ireatment system <br /> P 9 &panl of discharge <br /> E;Ssi:iii:E;�iiii <br /> Selected Pump Capacity: 67 gpm tofoi a�e <br /> lengt <br /> � 2A.elevatlon <br /> ': " di(ference <br /> 2. Determme Total D namic Head/�DH �c�e :;' �; <br /> nlet ; <br /> � y t' � <br /> :., _ . _ <br /> A Elevation difference between pump and point of discharge. '� <br /> , <br /> . . <br /> . <br /> 20 feet ��W--"�W -------------------------- ----- <br /> B. Special head requirement?(See Figure-Special Head Requiremenfs) <br /> ��feet Specc:ial Head Requirements <br /> Gravity Distribution Oft <br /> C. Friction loss in supply pipe Pressure Distribution 5ft <br /> 1. Select pipe diameter ��in <br /> 2. Enter Figure E-9 with gpm(1A or B)and pipe diameter(C1) <br /> Read fiction loss in feet r 100 feet from Figure E-9 E-9 Friction Loss in Plastic Pipe <br /> Friction loss= 7�ft/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 length for fiction loss in fittings. m 1.5" 2.0" 3" <br /> �;-_•, i r..-^�' ri. �ai <br /> Pi len th times 1.25=equivalent pipe length �� ��73� �011�; <br /> 155 ft x 1.25= 193.75 feet 25 3 73 1 11 016 <br /> #".'�� ���x -'���5� �U`23: <br /> 4.Calculate total friction loss by multiplying fiction foss(C2) 35 6.96 2.06 0.3 <br /> �:y'91�� 264, '0.39 <br /> by the equivalent pipe length(C3)and divide by 100. � �• <br /> Friction Loss= 7 fl/100ft X 193.75 ft / 100= 13.6 feet 45 11.07 3.28 0.48 <br /> c54:� �13 46� =3 99' '0.58' <br /> D. Total head requirement is the sum of elevation difference(A),special 55 4.76 0.7 <br /> head requirements(B),and total friction loss(C4). 60' 5.6 0.82 <br /> 20 ft + 5 ft + 14.0 ft 65 6.48 0.95 <br /> Z0 7.44 1.09 <br /> Total Head: 39.0 feet <br /> 3. Pump Selection <br /> 1.A pump must be selected to deliver at least 67 gpm(1A or B) <br /> with at least 39.0 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 /> �� , <br /> (signature) 810 (license#) !� �ate <br /> ��. <br /> Page 1 of 1 <br />