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OSTP Pump Selection Design Minnesota Pollution UNIVERSITY Worksheet OF MINNESOTA ifilkit Control Agency 1. PUMP CAPACITY v 11.05.31 A. Pumping to Gravity or Pressure Distribution: I O Gravity C,Pressure Selection required 1. If pumping to gravity enter the gallon per minute of the pump: GPM 2. Is the pump for the treatment system or the collection system: I0 Treatment System O Collection System Selection required for worksheet to work properly 3. If pumping to a pressurized treatment system,what part or type of system: Soil Treatment Unit D Media Filter ❑Other 4. It pumping to a pressurized distnbution system: I 36.0 GPM (Line 11 of Pressure Distribution or Line 10 of Non-Level or enter if Collection System) 2. HEAD REQUIREMENTS Soil treatment systein^ 3. Elevation Difference 11 ft &pant of discharge between pump and point of discharge: S 4Mw0th NOTE:IF system is an individual subsurface sewage treatment system, complete steps 4-9. If system is a Collection System, nretpee Elevation r' skip steps 4,5, 7 and 8 and go to Step 10. 6 diNerence 4. Distribution Head Loss: 5 ft 5. Additional Head Loss: ft(due to special equipment,etc.) h,-Friction Loss in Plastic Pipe per 100 ft Distribution Head Loss (C=130) Gravity Distribution = Oft Nominal Pipe Diameter Pressure Distribution based on Minimum Average Head Flow Rate 1 11/4 114 2 3 Value on Pressure Distribution Worksheet: (GPM) 10 9.11 3.08 1.27 0.31 --- Minimum Average Head Distribution Head Loss 12 12.77 4.31 1.78 0.44 1ft 5ft 2ft Mt 14 16.99 5.74 2.36 0.58 --- 5ft 10ft 16 --- 7.35 3.03 0.75 0.10 18 --- 9.14 3.76 0.93 0.13 6. A.Supply Pipe Diameter: 2.0 in 20 --- 11.11 4.58 1.13 0.16 B.Supply Pipe Length: 45 ft 25 16.79 6.92 1.71 0.24 30 --- --- 9.69 2.39 0.33 7. Based on Friction Loss in Plastic Pipe per 100ft from Table I: 35 --- 12.90 3.18 0.44 40 --- --- 16.52 4.07 0.57 Friction Loss= 3.32 ft per 100ft of pipe 45 --- --- --- 6.07 0.70 8. Determine Equivalent Pipe Length from pump discharge to soil dispersal 50 --- --- --- 6.16 0.86 area discharge point. Estimate by adding 25%to supply pipe length for 55 --- --- --- 7.35 1.02 fitting loss. Supply Pipe Length(6.8) X 1.25=Equivalent Pipe Length 60 --- --- --•- 8.63 1.20 65 --- --- --- 10.01 1.39 45 ft X 1.25 = 56.3 ft 70 --- --- --- 11.48 1.60 9. Calculate Supply Friction Loss by multiplying Friction Loss Per 100ft (Line 6)by the Equivalent Pipe Length (Line 7)and divide by 100. Supply Friction Loss= 3.32 ft per 100ft X 56.3 ft ÷ 100 = 1.9 ft