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OSTP Basic Pump Selection Design <br /> Mi�nesota Pollution Worksheet UV IV ERSITY - <br /> ControlA ency OF MINNESOTA �`-�,' <br /> 1. PUMP CAPACITY Pro�ect IB: <br /> Pumping to Gravity or Pressure Distribution: � Gravi,y i vressu�z Se�ection required <br /> 1. If pumping to gravity enter the gatlon per minute of the pump: ��GPM /10-45 gpm� <br /> 2. If pumping fo a pressunzed distribution system: 36.0 GPM <br /> 3. EnYer pump description: <br /> 2. HEAD REQUIREMENTS +�P•�����•���y����� <br /> a co�<.,o+e,�<<,.�q� <br /> � A. Etevation Difference I 8�fi .--�fi�"'"'- <br /> L__ C�� s�''t"�`��` I <br /> between pump and point of discharge: _� ' .� � <br /> ,�.t a�,• _ ", � <br /> ,_. . m ne.nw�: <br /> B. Distnbution Head Loss: �ft �~ a,n<,,..k� � � <br /> _S ; ��� ; <br /> C. Additionat Head�oss: ��ft�o:.�cosFec;3ieq�;Pmeoc.eu.i �--------_-------------�--.-------•- <br /> i Table I.Friction l.oss in Plastic Pipe per 100ft <br /> Distribution Head Loss � <br /> Gravity Distribution = Oft FIGr:Rate P�pe Diameter ItncheSi <br /> IGPt�hl 7 1.25 ' 7.5 2 <br /> Pressure Distribution based on Minimum Average Head 10 ' 9.1 � 3.1 7.3 0,3 <br /> Value on Pressura Distribution WorkshePt.: <br /> i2 '� 12.8 ' 4.3 '; 1.8 � 0.4 <br /> Minimum Avera e Head Distribution Head Loss �q ' �7.Q 5,7 � 2,.� 0.6 <br /> 1ft Sf� 16 � 21.8 i 7.3 � 3.0 � OJ <br /> 2fi 6ft <br /> Sft 10ft �8 9.1 , 3.$ 0.9 <br /> 20 ; 11.1 i 4.6 1.1 <br /> 25 16.8 6.9 1.7 <br /> D. 1.Suppty Pipe Diameter. 2.0 in 30 � 23.5 '; 9J 2.4 <br /> 35 t2.9 3.2 <br /> 2.Supply Pipe Length: 15 ft �Q � i <br /> f 16.5 4.1 <br /> E. Friction Loss in Plastic Pipe per 100ft from Table I: '35 i i 20.5 5.0 i <br /> 50 ( 0.1 <br /> fnttion Loss= 3.32 ft per t00ft of pipe 55 � 7,3 <br /> 60 $.6 <br /> p, Determine Equivalent Pipe Length from pump discharge to soil dispersat area discharge 55 ! 10.0 <br /> point. Estimate by adding 25a to supply pipe length for fitting loss. Supp(y Pipe Length �� i �� 4 <br /> (D.21 X 7.25=Equivalent Pipe Length 75 13.0 <br /> 15 ft X L25 = 18.8 ft 85 16.4 <br /> `�5 20.1 <br /> G. Calcutate Supply F�iction Loss by multiplying Friction Loss Per 100jt ILine E)by the Equivalent Pipe Length �line F)and divide by 700. <br /> Supply Friction Loss= <br /> 3.32 'ft per t00ft X 18.8 ft - 100 - Q.6 ft <br /> H• Toto!Neod requirement is the sum of the Elevation Difference ILine A),the Distnbution Head Loss�Line 8�,Additional Head Loss�Line C),and <br /> � the Suppty Fnctio�Loss iLine G ) <br /> , I 8•� ft SA ft - ��fi - 0.6 ft = 13.6 f� <br /> 3. PUMP SELECTION <br /> A pump must be selected to detiver at least 36.� GPM�Line 7 or Line 2j with at teast '�3,6 feet of to[al head. <br /> Comments: <br />