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OSTP Basic Pump Selection Design UNIVERSITY <br /> Minnesota Pollution . <br /> Control Agency Worksheet OF MINNESOTA N..-s.�4 <br /> 1. PUMP CAPACITY Project ID: v 11.09.22 <br /> Pumping to Gravity or Pressure Distribution: I 0 Gravity Qi Pressure Selection required 2 <br /> 1. If pumping to gravity enter the gallon per minute of the pump: GPM (10-45 gpm) <br /> 2. If pumping to a pressurized distribution system: 36.0 GPM <br /> (Line 11 of Pressure Distribution) sod treatment system <br /> Si point of discharge <br /> 2. HEAD REQUIREMENTS 'l:p.; 01 <br /> A. Elevation Difference 16 ft ‘----- SUp�`y �e¢� h <br /> nlet pipe <br /> between pump and point of discharge: �---- He enc <br /> B. Distribution Head Loss: 5 ft fi'46.111:141L- -6 ,i ,� <br /> C. Additional Head Loss: ft(due to special equipment,etc.) <br /> Table I.Friction Loss in Plastic Pipe per 10.0ft__ <br /> Distribution Head Loss Pie Diameter (inches) <br /> Gravity Distribution = Oft Flow Rate <br /> (GPM) 1 1.25 ( 1.5 ! 2 <br /> Pressure Distribution based on Minimum Average Head 10 9.1 3.1 1.3 1 0.3 <br /> Value on Pressure Distribution Worksheet: 12 ' 12.8 4.3 1.8 0.4 <br /> Minimum Average <br /> rage Head Distribution Head Loss 14 17.0 5.7 2.4 0.6 <br /> 5ft 16 21.8 ! 7.3 3.0 0.7 <br /> 2ft 6ft 18 9.1 3.8 j 0.9 <br /> 5ft 1 Oft <br /> 20 i 11.1 4.6 1.1 <br /> 25 16.8 6.9 1.7 <br /> D. 1.Supply Pipe Diameter: 2.0 in 30 23.5 9.7 2.4 <br /> 35 12.9 3.2 <br /> 2. Supply Pipe Length: 60 ft 40 16.5 ' 4.1 <br /> E. Friction Loss in Plastic Pipe per 100ft from Table I: 45 20.5 5.0 <br /> 50 6.1 <br /> Friction Loss= 3.32 ft per 100ft of pipe 55 7.3 <br /> 60 <br /> 8,6 <br /> F. Determine Equivalent Pipe Length from pump discharge to soil dispersal area discharge 65 10.0 <br /> point. Estimate by adding 25%to supply pipe length for fitting loss. Supply Pipe Length 70 i 11.4 <br /> (D.2) X 1.25=Equivalent Pipe Length 75 13.0 <br /> 60 ft X 1.25 = 75.0 ft 85 16.4 <br /> 95 j 20.1 <br /> G. Calculate Supply Friction Loss by multiplying Friction Loss Per 100ft (Line E)by the Equivalent Pipe Length (Line F)and divide by 100. <br /> Supply Friction Loss= <br /> 3.32 ft per 100ft X 75.0 ft + 100 = 2.5 ft <br /> H. Total Head requirement is the sum of the Elevation Difference (Line A),the Distribution Head Loss(Line B),Additional Head Loss(Line C),and the <br /> Supply Friction Loss(Line G ) <br /> 16.0 ft + 5.0 ft + ft + 2.5 ft = 23.5 ft <br /> 3. PUMP SELECTION <br /> A pump must be selected to deliver at least 36 GPM(Line 1 or Line 2)with at least 24 feet of total head. <br /> Comments: <br />