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� , r. <br /> � � OSTP Basic Pump Selection Design <br /> Minnesota Pollution Worksheet UNIVERSITY <br /> Cor�trol A enc OF MINNESOTA �"1,r'�' <br /> 1. PUMP CAPACITY Project ID: <br /> Pumping to Gravity or Pressure Distribution: Q crawty QQ ar�.wre Selection required <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 /> 3. Enter pump description: <br /> 2. HEAD REQUIREMENTS eva^to� <br /> i <br /> A. Elevation Difference 11 ft � m � <br /> between pump and point of discharge: <br /> � <br /> �et pyx e�(N�ronce�,". <br /> B, Distribution Head Loss: �ft ---- <br /> C. Additional Head Loss: �ft(due to speciat eqWpment,eec.� ----------------------------- •------------• <br /> Tabie I.Friction i.oss in Plastic Pi 100ft <br /> Distribution Head Loss <br /> Gravity Distributton = Oft Flow Rate Pi Diameter linches) <br /> (GPM) 1 1.25 1.5 2 <br /> Pressure Distribution based on Minimum Average Head 10 9.1 3.1 1.3 0.3 <br /> Value on Pressure Distribution Worksheet: �2 12.8 4.3 1.8 0.4 <br /> IV�nlmumAvera �Head Distribution Head Loss �4 �7,0 5.7 2.4 0.6 <br /> 1ft 5ft �6 21.8 7.3 3.0 0.7 <br /> 2ft 6ft �g g,� 3.8 0.9 <br /> Sft 10ft 20 11.1 4.6 1.1 <br /> 25 16.8 6.9 t.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: 75 ft 4p 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 8.6 <br /> p, Determine Equivalent Pipe Length from pump discharge to soil dispersal area discharge 65 10.0 <br /> point. Estimate by addinQ 25%to supply pipe length for fitting loss. Supply Pipe Length �p 11.4 <br /> (D.2) X 1.25=Equivolent Pipe Length 7g 13.0 <br /> 85 tb.4 <br /> 75 ft X 1.25 = 93.8 ft 95 20.1 <br /> G. Catculate Supply Friction Loss by multiplying Friction Loss Per f00ft (Line E)by the Equivalent Pipe Length (Line F)and divide by 100. <br /> Supply Friction Loss= <br /> 3.32 ft per 100ft X 93.8 ft + 100 = 3.1 ft <br /> H• Total Head requirement is the sum of the Elevation Dffference (Line A),the Distribution Head Loss(Line B),Additional Head Loss(Line C),and <br /> the Supply Friction Loss(Line G) <br /> 11.0 ft + 5.0 ft + �ft + 3.1 ft = 19.1 ft <br /> 3. PUMP SELECTION <br /> A pump must be selected to deliver at least 36.Q GPM(Line 1 or Line 2)with at least 19.� feet of total head. <br /> Comments: <br />