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Minnesota Pollution OSTP Pump Tank Design Worksheet UNIVERSITY Control Agency (Demand Dose) OF MINNESOTA <br /> DETERMINE TANK CAPACITY AND DIMENSIONS Project ID: 22052 v 04.06.2017 <br /> 1. A. Design Flow (Design Sum.1A): 600 <br /> GPD <br /> B. Min. required pump tank capacity: 1000 Gal C.Recommended pump tank capacity: 1000 Gal <br /> 2. A. Tank Manufacturer: Brown Wilbert B. Tank Model: 1000 <br /> C. Capacity from manufacturer: 1000 Gallons Note:Design calculations are based on this specific tank. <br /> Substituting a different tank model will change the pump <br /> D. Gallons per inch from manufacturer: 23.0 Gallons per inch float or timer settings. Contact designer if changes are <br /> necessary. <br /> E. Liquid depth of tank from manufacturer: 42.0 inches <br /> DETERMINE DOSING VOLUME <br /> 3 Calculate Volume to Cover Pump (The inlet of the pump must be at least 4-inches from the bottom of the pump tank 8 2 inches of water covering the pump <br /> is recommended) <br /> (Pump and block height+2 inches)X Gallons Per Inch (2C or 3E) <br /> ( 12 in + 2 inches) X E23.0 Gallons Per Inch = 322 Gallons <br /> 4 Minimum Delivered Volume = 4 X Volume of Distribution Piping: <br /> -Line 17 of the Pressure Distribution or Line 11 of Non-level 134 Gallons(minimum dose) <br /> 5 Calculate Maximum Pumpout Volume (25%of Design Flow) <br /> Design Flow: 600 GPD X 0.25 = 150 Gallons(maximum dose) <br /> 6 Select a pumpout volume that meets both Minimum and Maximum: 150 Gallons Volume of Liquid in <br /> 7 Calculate Doses Per Day =Design Flow:Delivered Volume Pipe <br /> 600 gpd 15o gal = 1 4 ?Doses Pipe Liquid <br /> 8 Calculate Drainback: <br /> Diameter Per Foot <br /> A. Diameter of Supply Pipe= inches (inches) (Gallons) <br /> B. Length of Supply Pipe= 80 feet 1 0.045 <br /> C. Volume of Liquid Per Linea(Foot of Pipe = 0.170 Gallons/ft 1.25 0.078 <br /> 1.5 0.110 <br /> D. Drainback =Length of Supply Pipe X Volume of Liquid Per Lineal Foot of Pipe <br /> 80 ft X o.170 2 0.380 <br /> gal/ft = 13.6 Gallons <br /> 3 0. 0 <br /> 9. Total Dosing Volume =Delivered Volume plus Drainback <br /> 150 pal + 13.6 4 0.661 <br /> gat = 164 Gallons <br /> 10. Minimum Alarm Volume=Depth of alarm(2 or 3 inches)X gallons per inch of tank <br /> 1 2 1in X E23.0 gal/in = 46.0 Gallons <br /> DEMAND DOSE FLOAT SETTINGS <br /> 11. Calculate Float Separation Distance using Dosing Volume. <br /> Total Dosing Volume/Gallons Per Inch <br /> 164 pal - 23.0 gal/in= 7.1 Inches <br /> 12. Measuring from bottom of tank: Inches for Dose: 7.1 in <br /> A. Distance to set Pump Off Float =Pump.block height+2 inches _ <br /> 12 in + to 14 Inches Alarm Depth 23.1 in <br /> B. Distance to set Pump On Float=Distance to Set Pump-Off Float +Float Separation Distance Pump On 21.1 in 46.0 Gal <br /> 14 in + 7.1 in = 21 Inches Pump Off 14.0 in 164 Gal <br /> C. Distance to set Alarm Float =Distance to set Pump-On Float +Alarm Depth (2-3 inches) 322 Gal <br /> 21 in + 2.0 in = 23 Inches <br />