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University of Minnesota Pump Selection Procedure - 10125104 <br /> All boxed rectangles must be entered,the rest will be calculated. <br /> ONSIT! � <br /> 1. Determine um ca ac s`"""iGe <br /> p P p �h►• TREATMENT -�- C, <br /> A. Gravity Distribution P"oa""'"' -� <br /> 1.Minimum required discharge is 10 gpm <br /> 2.Maximum suggested discharge is 45 gpm <br /> For other establishments at least 10%greater than the water <br /> supply rate,but no faster than the rate at which effluent will flow <br /> out of the distribution device. <br /> B. Pressure Distribution-see pressure design worksheet soll ireatment system <br /> &point of discharge <br /> ..IF....;E.. <br /> Selected Pump Capacity: 47 gpm totoi p;pe <br /> length <br /> In(et •°.�..•,.•.�•:..•",.•: 2A.etevation <br /> 2. Determine Total namic Head DH �}'" dsfference <br /> �Y �T ) a'Pe ;�� <br /> i <br /> A. Elevation difference between pump and point of discharge. ' <br /> ;;�- - - <br /> � <br /> ;; _ __ <br /> 15 feet �:� ; <br /> ;i�.. .,......,:�:�:---------------------------- ------ <br /> B. Special head requirement?(See Figure-Special Head Requirements) <br /> �feet Special Head Requirements <br /> Gravity Distribution Oft <br /> C. Fricfion 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= 3.99 ft/100 ft of pipe er 100 ft <br /> nominal <br /> 3.Determine total pipe length from pump discharge to soil system discharge point Flow Rate i diameter <br /> Estimate by adding 25 percent to pipe length for friction loss in fittings. m 1.5" 2.0" 3" <br /> Pi e len th times 1.25=equivalent pipe length 20 2.47 0.73 0.11 <br /> 65 ft x 1.25= 81.25 feet 25 3.73 1.11 0.16 <br /> 30 5.23 1.55 0.23 <br /> 4.Calculate total fiction loss by mul6plying fiction loss(C2) 35 6.9fi 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= 3.99 ff/100ft X 81.25 ft / 100= 3.2 feet 45 11,07 3.28 0.48 <br /> 50 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 /> 15 ft + 5 ft + 3.2 ft 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> Total Head: 24.0 feet <br /> 3. Pump Selection <br /> 1.A pump must be selected to deliver at least 47 gpm(1A or B) <br /> with at least 24.0 feet of total head(2D). <br /> I hereby cer'�iat I have completed this wo�k in acxordance with afl applicable ordinances,rules and laws. <br /> , -e <br /> / (signature) 810 (license#j 2/08/09 (Date� <br /> Page 1 of 1 <br />