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University of Minnesota Pump Selection Procedure - 10125104 <br /> All boxed rectangles must be entered,the rest will be calculated. <br /> ows.rs <br /> se <br /> 1. Determine pump capacity: TREATMENT <br /> A. Gravity Distribution PueooRwM <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 soli treatment system <br /> &pd t of discharge <br /> t ti Y.t....::: <br /> Selected Pump Capacity: ( 47 gpm total pipe <br /> lengt <br /> elation <br /> inlet • ' 2A. <br /> Adifference <br /> 2. Determine Total Dynamic Head(TDH) pipe <br /> A. Elevation difference between pump and point of discharge. <br /> 16 feet 0 <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 in <br /> 2. Enter Figure E-9 with gpm(1A or B)and pipe diameter(C1) <br /> Read friction loss in feet per 100 feet from F(gure E-9 E-9 Friction Loss in Plastic Pipe <br /> Friction loss= ( 3.99 Ift/100 ft of pipe . : 100 ft <br /> nominal <br /> 3.Determine total pipe length from pump dlecharge to soil system discharge point. Flow Rate • =diameter <br /> Estimate by adding 25 percent to pipe length for friction loss in fittings. 1.5 2.0' 3' <br /> Imes 1.25=equivalent pipe length $ <br /> 125 ft x 1.25= 156.25 feet 25 MOM 0.16 <br /> fl <br /> 423 <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. Ot,. 039 <br /> Friction Loss= 3.99 ft/100ft X 156.25 ft / 100= 6.2 feet 45 11.07 3.28 0.48 <br /> 50 113.x#8 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 /> 16 ft + 5 ft + 7.0 ft 65 6.48 0.95 <br /> 70 7 1.09 <br /> Total Head: 28.0 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 28.0 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///O5- (date) <br /> Page 1 of 1 <br />