Laserfiche WebLink
PUMP SELECTIONFROCEDU. RE <br /> 1. Determine pump capacity: <br /> A. Gravity distribution <br /> 1. Minimum required discharge is 10 gpm <br /> 2. Maximum suggested'discharge is 45 gpm. For other <br /> establishments at least 10%gregter than the water supply rate, <br /> but no faster than the rate at which effluent will flow out of the <br /> d1sttibution device. <br /> B. Pressure distribution <br /> See pressure-distribution work sheet <br /> From'A or B Selected*pump capacity: 3 gpm <br /> 2. Determine pump'head-requirements: <br /> A. Elevation difference between pump and point of discharge? soli treatment systen <br /> 2 feet &p Int f !;charge <br /> QA IT <br /> 8y� <br /> B. Special head requirement?(See Figure at right-Special Head Requirements) t�"' <br /> feet l <br /> Inlet , n <br /> C. Calculate Friction loss pipe difference <br /> 1. Select pipe diameter sin <br /> 2. Enter Figure E-9 with gpm(IA or B)and pipe diameter(C1). <br /> Read friction loss in feet per 100 feet from Figure E-9 ffG�avl <br /> Head -Requirements <br /> Friction Loss= a•l� ft/•100ft of pipe istribution 0 ft <br /> 3. Determine total pipelength froni•pump discharge to soil treatmentDistribution 5 ft <br /> discharge point.Estimate by adding 25 percent to pipe length for <br /> fitting loss. Total pipe length times 1.25=equivalent pipe length <br /> 1 ZZ) feet x 1.25 feet E-9a Friction Loss in Plastic Pipe - <br /> 4. Calculate total friction loss by multiplying friction loss(C2) Por 100 feet <br /> nominal <br /> in f /100f ,bythe equivalent (C )anddivideby100. pipe diameter <br /> = a•��ft/100ft x 1 4� _+100=S�ft now rate 1.5" 2" 311 <br /> m <br /> D. Total head required is.the sum of elevation difference(A),special" 20 2.47 0.73 0.11 <br /> head requirements.(B),and total friction loss (C4) 25 3.73 1.11 0.16 <br /> ft+ S' ft= 30 5.23 1.55 0.23 <br /> Total head: I� feet 35 6.96 2.06 0.30 <br /> 40 8.91 2.64 0.39 <br /> 3. Pump selection 45 11.07 3.28 0.48 <br /> 50 13.46 3.99 0.58 <br /> A pump must be selected to deliver at least 3�Vm 55 4.76 0.70 <br /> (1A or B) with at least LCL_feet of total head (2D) <br /> 65 60 .60 0.82 <br /> 5 5.48 0.95 <br /> 70 7,44.__-I.09 <br /> I hereby certify that I h ve completed this work in accordance with applicable ordinances, .rules and laws. <br /> � (signature) (license#) 1 -)�J - 0 1-. (date) <br />