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__ OSTP Basic Pump Selection Design <br /> UNIVERSITY =z � , <br /> Minnesota Pollution �..,,t4.-_,,m,,,,, <br /> Control Agency Worksheet OF MINNESOTA r_ �„� - <br /> 1. PUMP CAPACITY Project ID: v 12.08.06 <br /> Pumping to Gravity or Pressure Distribution: f 0 Gravity OO Pressure 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 /> (Line 11 of Pressure Distribution) <br /> Sud treatment system <br /> a point of discharge <br /> - <br /> 2. HEAD REQUIREMENTS 471 <br /> f. <br /> A. Elevation Difference 12 ft : 4 ..,=99 "* _ <br /> between pump and point of discharge: oast° m tie gran <br /> _ difference <br /> B. Distribution Head Loss: 5 ft <br /> C. Additional Head Loss: ft(due to special equipment,etc.) <br /> Table I.Friction Loss in Plastic Pipe per 100ft <br /> Distribution Head Loss <br /> Gravity Distribution = Oft Flow Rate Pipe Diameter(inches) <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: 12 12.8 4.3 1.8 0.4 <br /> Minimum Average Head Distribution Head Loss 14 17.0 5.7 2.4 0.6 <br /> 1ft 5ft 16 21.8 7.3 3.0 0.7 <br /> 2ft 6ft 18 9.1 3.8 0.9 <br /> 5ft 1 Oft 20 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: 80 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 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 11.4 <br /> (D.2) X 1.25=Equivalent Pipe Length 75 13.0 <br /> 85 16.4 <br /> 80 ft X 1.25 = 100.0 ft 95 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 100.0 ft 100 = 3.3 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 /> 12.0 ft + 5.0 ft + ft + 3.3 ft = 20.3 ft <br /> 3. PUMP SELECTION <br /> A pump must be selected to deliver at least 36.0 GPM(Line 1 or Line 2)with at least 20.3 feet of total head. <br /> Comments: <br />