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Aug 04 07 07: 49a FYLE 'S 7632955422 p. 9 <br /> University of Minnesota Pump Selection Procedure - 10!25104 <br /> All boxed rectangles must be entered,the rest will be calculated. <br /> OKslre <br /> 1. Determine pump capacity: 'rm re <br /> nim <br /> t:Hr <br /> A. Gravity Distribution Pwoo <br /> 1.Minimum required discharge is 10 gpm <br /> 2.Maximum suggested disrge is 45 gpm <br /> For other establishments att 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 soil treatment system <br /> &point of discharge <br /> Selected Pump Capacity: 38 gpm iota' pipe <br /> length <br /> 2A.elevation <br /> Inletdifference <br /> 2. Determine Total Dynamic Head(TDH) pipet"-"'""lil"""-- <br /> A. Elevation difference between pump and point of discharge. <br /> 16 feet ,r...... <br /> B. Special head requirement?(See Figure-Special Head Requirements) <br /> 5 feet Special Head Requirements <br /> Gravity Distribution Oft <br /> C. Friction loss in supply pipe Pressure Distribution 5ft <br /> 1. Select pipe diameter , 2 lin <br /> 2. Enter Figure E-9 with gpm(1A or B)and pipe diameter(C1) <br /> Read friction loss in feet I-r 100 feet from Figure E-9 E-9 Friction Loss in Plastic Pipe <br /> Friction loss= 2.64 ft/100 ft of pipe per 100 ft <br /> nominal <br /> 3.Determine total pipe length from pump discharge to soil system discharge point Flow Rate pipe diameter <br /> Estimate by adding 25 percent to pipe length for friction loss in fittings. (gpm) 1.5' 2.0' 3" <br /> Pit• lent I times 1.25=equivalent pipe length 20< 2.47.•:, 073 0.11 <br /> 60 ft x 1.25= 75 feet 25 3.73 1.11 0.16 <br /> 30 5. 3 "155 023 <br /> 4.Calculate total friction loss by multiplying friction loss(C2) 35 6.96 2.06 0.3 <br /> by the equivalent pipe length(C3)and divide by 100. 40 8.91 -\.'72,04,-; 039 <br /> Friction Loss= 2.64 ft/100ft X 75 ft 1100= 2.0 feet 45 11.07 3.28 0.48 <br /> 50 13.46 39 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 /> 16 ft + 5 ft + 2.0 ft 65 _6.48 0.95 <br /> 70 _ 7,44 1.09 <br /> Total Head: 23.0 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 23.0 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#) 7/13/07 (Date) <br /> Page 1 of 1 <br />