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�� OSTP Basic Pump Selection Design � <br /> Minnesota Pollution Worksheet UNIVERSITY <br /> ControlAgency OF MINNESOTA ":1�::��"' <br /> 1. PUMP CAPACITY Project ID: <br /> Pumping to Gravity or Pressure Distribution: QQ cravity QPressure Selection required <br /> 1. If pumping to gravity enter the gallon per minute of the pump: 20.0 GPM (f0-45 gpm) <br /> 2. If pumping to a pressurized distribution system: �GPM <br /> 3. Enter pump description: <br /> 2. HEAD REQUIREMENTS 6pokHofdi�"� <br /> ,� . <br /> A. Elevation Difference �ft � <br /> swd+�""` <br /> between pump and point of discharge: <br /> � EkveOiwi%''• <br /> B. Distribution Head Loss: �ft - am�,u <br /> C. Additional Head Loss: �ft(due to special equipment,ec�.� ; ----------------------------- -------------. <br /> Table l.FNction Loss in Plastic Pi 100k <br /> Distrilsutlon Head L,oss <br /> Gravity Dtstribution = oft Flow Rate � 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: �2 �2,g 4,3 1.8 0.4 <br /> N�nimurr��vsra e.Head Df�ibution He�d Loss �4 17.0 5J 2.4 0.6 <br /> 1 ft 5ft �6 21.8 7.3 3.0 -0J <br /> 2ft 6ft �g q.1 3.8 0.9 <br /> 5ft 1 Oft 20 11.1 4.8 1.1 <br /> 25 16.8 6.9 1.7 <br /> D. 1.Supply Pipe Diameter. 2.0 in 30 23.5 9J 2.4 <br /> 2.Supply Pipe Length: 26 ft 35 12.9 3.2 <br /> 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= 1.12 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 b5 10.0 <br /> point. Estimate by adding 25%to supply pipe length for fitting loss. Supply Pipe Length �0 11.4 <br /> (D.2) X 1.25=Equivalent Pipe Length 75 13.0 <br /> 85 16.4 <br /> 26 ft X 1.25 = 32.5 ft 95 20.1 <br /> G. Calculate Supp(y 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 /> 1.12 ft per 100ft X 32.5 ft + 100 = 0.4 ft <br /> H. Tota!Head requirement is the sum of the Elevation Difference (Line A),the Distribution Head Loss(Line B),Additional Head Loss(Line C),and <br /> the Supply Friction Loss(Line G ) <br /> 6.0 ft + �ft + �ft + 0.4 ft = 6.4 ft <br /> 3. PUMP SELECTION <br /> A pump must be selected to deliver at least 20�Q GPM(Line 1 or Line 2)with at least 6,4 feet of total head. <br /> Comments: <br />