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OSTP Basic Pump Selection Desi�n <br /> �"� ��� UNIVERSITY " �� <br /> tVlinnesota Pollution WOrk$heet � �'� � '�>- "'� <br /> ControtA enc OF MINNESOTA ��.,� <br /> 1. PUMP CAPACITY Project ID: ��� �9 ZZ <br /> Pumping to Gravity or Pressure Distribution: O�raviry �aressure Selection required 2 <br /> 1. If pumping to gravity enter the gallon per minute of the pump: ��GPM (10-45 3Pm) <br /> 2. If pumping to a pressurized distribution system: 34.0 GPM <br /> (Line 11 of Pressure Distributian) <br /> o�treatment system <br /> 8 point of d�ischa�ge <br /> 2. HEAD REQUIREMENTS „� <br /> A. Elevation Dlfference 13 ft wv�y``"e�e`�� <br /> between pump and point of dischar e: n1e1 P�Pe <br /> --_--- - ,---- <br /> g - Eleva[ion% <br /> ff��--�� � � differerce <br /> B. Distnbution Head Loss: �ft __ c� <br /> � ti,._ <br /> i ---------------------------- ------------- <br /> C. Additional Head Loss: ��ft(due to special equipment,etc.) <br /> Tabte I.Friction Loss in Plastic Pipe per 100ft <br /> Distrib�tion Head Loss <br /> Gravity Distribution = oft Flow Rate Pi e Diameter(inches) <br /> (GPM) 1 1.25 1.5 2 <br /> Pressure Distribution based on Minimum Average Head 1p 9,9 3.1 1.3 0.3 <br /> Value on Pressure Distribution Worksheet: �2 12.8 4.3 1.8 0.4 <br /> Minimum Avera e Head Distribution Head Loss �4 17.0 5.7 2.4 0.6 <br /> �ft 5ft 16 21.8 7.3 3.0 0.7 <br /> 2ft bft 18 9.1 3.8 0.9 <br /> 5ft 1 Oft <br /> 20 11.1 4.6 1.t <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: 140 ft 40 16.5 4.1 <br /> E. Friction Loss in Plastic Pipe per t00ft from Table I: 45 20.5 5,0 <br /> 50 6.1 <br /> Friction Loss= 2.99 ft per t00ft of pipe 55 7,3 <br /> 60 8.6 <br /> F, Determine Equivotent 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. Suppfy Pipe Length �p 11.4 <br /> (D.2) X 1.25=Equiva(ent Pipe Lenqth 75 13.0 <br /> 140 ft X 1.25 = 175.0 ft 85 16.4 <br /> 95 20.1 <br /> G. Calculate Supply Friction Loss by multiplying Friction Loss Pe�100ft (Line E)by the Equivalent Pipe Length (Line F)and divide by 100. <br /> Suppty Friction Loss= <br /> 2.99 ft per t00ft X 175.0 ft - 100 = 5.2 ft <br /> H• Totot Head requirement is the sum of the E(evation Difference (Line A),the Distribution Head Loss(Line B),Additional Head Loss(Line C),and the Supply <br /> Friction Loss(Line G ) <br /> 13.0 ft + 5.0 ft + 5.0 ft + 5.2 ft = 28.2 ft <br /> 3. PUMP SELECTION <br /> A pump must be setected to detiver at least 34 GPM(Line 1 or Line 2)with at least 29 feet of total head. <br /> Comments: <br /> �� o� .�� <br />