Laserfiche WebLink
Ui�iversity �f Minnes�,G �ump S�l�ct;on Proc���re - 'l012510� <br /> All boxed rectangles must be entered,the rest will be calculated. <br /> ONSITC � <br /> 1. Determine pump capacity: s�wAa� - �r_ ,_ <br /> TREATMENT _ <br /> A. Gravity Distribution PROGRAM �����- <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 1fian 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 /> ................ <br /> Selected Pump Capacity: 18 gpm rotai p�Pe <br /> lengih <br /> _,_.�.,._,.,�.,_� 2A.elevation <br /> in!e! ;-..._----°-°--°-=� =' difference <br /> P p Po 9 �; <br /> A. Elevation difference between um�and int of dischar e. '' <br /> �: <br /> 2. Determme Total nam�c H c�,� ; <br /> _�_12 feet , �:------------------------- ----- <br /> _._..._..�__...-�-:»��� <br /> B. Special head requiremenh(See Figure-Special Head Requirements) <br /> �feet Special 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= 0.73 ft/100 ft of pipe er 100 ft <br /> nominal <br /> 3.DeteRnine 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 /> �Pi len th times 1.25=equivalent pipe length 20 2.47 0.73 0.11 <br /> ft x 1.25= 112.5 feet 25 3.73 1.11 0.16 <br /> 30 5.23 1.55 0:23 <br /> 4.Calculate total friction loss by multiplying fiction loss(C2) 35 6.96 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= 0.73 ft/100ft X 112.5 ft / 100= 0.8 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 fiction loss(C4). 60 5.6 0.82 <br /> 12 ft + 5 ft + 1.0 ft 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> Total Head: 18.0 feet <br /> 3. Pump Selection <br /> 1.A pump must be selected to deliver at least 18 gpm(1A or B) <br /> with at least 18.0 feet of total head(2D). <br /> I hereby certify that I have completed this work in acxordance with all applicable ordinances,rules and laws. <br /> (signature) 810 (license#) 1127108 (Date1 <br /> Page 1 of 1 <br />