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lrw.er <br />T4......, Pump Tank Design Worksheet (Demand Dose) m [OMT OL AGENCY TION <br />DETERMINE TANK CAPACITY AND DIMENSIONS Project ID: <br />v 04.01.2020 <br />1. A. Design Flow +Design Sum. IA): 750 GPD C. Tank Use: <br />Dosing <br />13. Min. required pump tank capacity: 1000 Gal D. Recommended pump tank capacity: 1000 Gal <br />2. A. Tank Manufacturer: B. Tank Model: <br />C. Capacity from manufacturer: 1000 Gallons <br />Note: Design calculations are based orr 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 <br />float or timer settings. Contact designer if changes are <br />necessary. <br />E. Liquid depth of tank from manufacturer: 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 @ 2 inches of water covering the pump is <br />recommended) <br />(Pump and block height - 2 inches) X Gallons Per inch <br />( 16 in + 2 inches) X 23.0 Gallons Per Inch = <br />414 Gallons <br />4 Minimum Delivered Volume = 4 X Volume of Distribution Piping: <br />-item 78 of the Pressure Distribution or item f l of Non -level 123 Gallons <br />(Minimum dose) 5.4 Inches/dose <br />5 Calculate Maximum Pumpout Volume 125% of Design Flow) <br />Design Flow: 750 GPD X 0.25 = 188 Gallons <br />(Maximum dose) 8.2 lnchesldose <br />6 Select a pumpout volume that meets both Minimum and Maximum: 150 Daltons <br />Volume +pf Liquid in <br />7 Calculate Doses Per Day = Design Flow -'Delivered Volume <br />750 gpd 15a gal = 5.00 Doses <br />Pipe <br />Pipe <br />Liquid <br />8 Calculate Drainback: <br />A. Diameter of Supply Pipe- inches <br />Diameter <br />Per Foot <br />(inches) <br />(Gallons) <br />B. Length of Supply Pipe = 75 feet <br />1 <br />0.045 <br />C. Volume of Liquid Per Lineal Foot of Pipe = 0.170 Gallons/ft <br />1.25 <br />0.078 <br />1.5 <br />0.110 <br />D. Dralnback = Length of Supply Pipe X Volume of Liquid Per Lineal Foot of Pipe <br />2 <br />0.170 <br />75 ft X 0.170 gal/lit = 12.8 Gallons <br />3 <br />0.380 <br />9. Total Dosing Volume = Delivered Volume plus Drainback <br />4 <br />0.661 <br />150 gal + 12.8 gal = 163 Gallons <br />10. Minimum Alarm Volume = Depth of alarm (2 or 3 inches) X gallons per inch of tank <br />in X gat/in Gallons <br />21 23.0 <br />DEMAND DOSE FLOAT SETTINGS <br />11. Calculate Float Separation Distance using Dosing Volume. <br />Total Dosing Volume /Gallons Per Inch <br />163 gal - 23.0 gal/in = i 7.1 Inches <br />12. Measuring from bottom of tank: <br />'L <br />A. Distance to se[ Pump Off Float = Pump - block height + 2 Inches <br />Inches for Dose: 7.1 in <br />16 in + 2 in 18 Inches <br />Alarm Depth 27.1 in <br />B. Distance to set Pump On Float=Distance to Set Pump -Off Float - Float Separation Distance <br />Pump On 25.1 in 46.0 Gal <br />18 in + 7.1 in = 25 Inches <br />Pump Off 18.0 in 153 Gal f <br />C. Distance to set Alarm Float = Distance to set Pump -On Float + Alarm Depth (2-3 inches) <br />414 Gal <br />25 In + 2.0 in = 27 Inches <br />