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PENSKE TRUCK LEASING <br />SANITARY SEWER PUMP CALCULATIONS <br />3.0 PUMP STATION DESIGN <br />Forcemain Material and Characteristics <br />Material PVC Sch. 40 <br />Hazen Williams Coefficient (C) 150 <br />Nominal Pipe Size 1.25 inches <br />Inside Diameter 1.38 inches <br />Pipe Inside Area 0.010 ftz <br />System Characteristics <br />Forcemain Length <br />810 If <br />Fitting Equivalent Length <br />74.29 If <br />Min. Pump Rate (1 Pump) <br />10 gpm <br />Velocity in Pipe at Min. Pump Rate <br />2.15 fps <br />Sump Elevation <br />8.88 ft <br />Pump Off Elevation <br />10.25 ft <br />Pump On Elevation <br />10.58 ft <br />Forcemain High Point Elevation <br />17.3 ft <br />Pressure at Forcemain Connection <br />22 psi (max) <br />Pressure at Forcemain Connection <br />50.8 ft head <br />Elevation Difference (OH) <br />6.88 ft <br />SITTS & HILL ENGINEERS, INC. <br />TACOMA, WASHINGTON <br />System Curve <br />Flow <br />(gpm) <br />Flow <br />(cfs) <br />Velocity <br />(fps) <br />hf <br />(ft) <br />OH <br />(ft) <br />h,.n <br />(ft) <br />Total Head <br />(ft) <br />18 <br />0.04 <br />3.86 <br />38.12 <br />6.88 <br />50.77 <br />95.78 <br />16 <br />0.04 <br />3.43 <br />30.66 <br />6.88 <br />50.77 <br />88.31 <br />15 <br />0.03 <br />3.22 <br />27.21 <br />6.88 <br />1 50.77 <br />84.86 <br />13 <br />0.03 <br />2.79 <br />20.88 <br />6.88 <br />50.77 <br />78.53 <br />11.8 <br />0.03 <br />2.53 <br />17.46 <br />6.88 <br />50.77 <br />75.11 <br />11 <br />0.02 <br />2.36 <br />15.33 <br />6.88 <br />50.77 <br />72.98 <br />10 <br />0.02 <br />2.15 <br />12.85 <br />6.88 <br />50.77 <br />70.50 <br />9 <br />0.02 <br />1.93 <br />10.58 <br />6.88 <br />50.77 <br />68.23 <br />8 <br />0.02 <br />1.72 <br />8.50 <br />6.88 <br />50.77 <br />1 66.16 <br />E-One SPD Pump Performance Curve <br />Total Head <br />(ft) <br />Pump <br />(GPM) <br />170 <br />8 <br />125 <br />10 <br />69 <br />12 <br />10 <br />14.2 <br />0 <br />14.6 <br />� <br />l �� h = i 0.44( l,� (Q RPm 1.85 <br />A i (Cli.8s(d 14.86ss <br />J l irirh�c 1 <br />Where: <br />V = velocity ht. = headloss due to friction <br />Q = flow rate L = pipe length <br />A = flow area C = Hazen - Williams roughness coef ficient <br />d = pipe diameter <br />