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Minnesota Potiution OSTP Basic Pump Selection Gesign <br /> UNIVERSITY <br /> Worksheet ��-��- <br /> ConYrolAgency OF MINNESOTA ; . ��- J�� <br /> t. PUMP CAPACITY Project ID: v 06.12.73 <br /> �umping to Gravity or Pressure Distribution: � (� c:arrty U�tesa,e Se(ect�on required <br /> 1- If pumpi�g to gravity enter the gallon per minute of the pump: �GPM (10-45 gpm j <br /> 2- if pumpittg to a pressurized distributSon system: 36.0 GPM <br /> 3. Enter pump description: <br /> 2. HEAD REQUtREMENTS v��,{snt. <br /> s co�:oi a�narqe <br /> A. Elevation Difference 29 ft �1�`� ` <br /> between pump and point of discharge: <br /> �,�, " <br /> B. Distribution Head Loss: � 5 �ft . �' � - - - f e rr�:.-- <br /> C. Additiona(Head Loss: ��fi�aue co�eoat eqavmenc.ecc.� ; - �� � -----------. <br /> � E-------------------------- - <br /> Table I.Friction Loss in Piastic Pipe per 100ft <br /> Distribution Head Loss ----- <br /> Gravity Distribution = O{t Flovr Race i P��Diameier(inches) <br /> (GPM) 1 { 1.25 1.5 2 <br /> P�essure Distributio� based on Minimum Average Head 70 9.1 T 3.� 0.3 <br /> Value on Pressure Distribution Worksheet: ! <br /> 12 1 12.8 ; 4.3 1.8 0.4 <br /> Minimum Avera e Head Distributio� Head Loss �q ! 17.0 � 5.7 2.4 0.6 <br /> �ft Sft tb i 21.8 ! 7.3 � 3.0 0.7 <br /> 5ft p�t �$ i � 9.1 � 3.8 � 0.9 <br /> 20 � 11.1 4.6 � 1.1 <br /> 25 � � 16.8 6.9 � 1 J <br /> D. t.Suppty Pipe Diameter. 2.0 in 30 � 23.5 9.7 2.4 <br /> 35 i ]2.9 ; 3.2 <br /> 2.Suppty Pipe Length: 145 ft 4p 16.5 4.t <br /> E. Frictio�Loss in Plastic Pipe per t00ft from Tabte I: 45 20.5 � 5.0 <br /> 50 � 6.1 <br /> Friction Loss= 3.32 ft per t00ft of pipe 5S 7.3 <br /> 60 8.6 <br /> F_ Determine Equivalent Pipe length from pump diuharge to soil dispersal area discharge 65 10.0 <br /> point. Estimate by adding 25%to suppty pipe Length for fitting toss. Supp(y Pipe Length �p t t,4 <br /> (D.2) X 1.25=Equivalent Pipe Lenqth 75 ! ! 13.0 <br /> 145 ft X 1.25 = 181.3 ft 85 � � 16.4 <br /> 95 i � 20.1 <br /> G. Caltutate Supply Friction Loss by multiplying Friction Loss Per f00ft (Line E)by the Equiva(ent Pipe Length (line F)and divide by 100. <br /> Supply Friction Loss= <br /> 3.32 ft per100ft X 181.3 ft � 100 = 6.0 ft <br /> H• Total Head requirement is the sum of the Elevation Difference (line A),the Disiribution Head loss(Line B),Additional Head Loss(Line C),and the <br /> Supply Friction Loss(Line G) <br /> 29.0 ft + 5.0 ft + ��ft + b.0 ft = 40.0 ft <br /> 3. PUMP SEIECTION <br /> A pump must be setected to deliver at least 36.0 GPM(Line 1 or Line 2)with at least 4Q.Q feet of total head. <br /> Comments: <br /> _ __ _ _ <br /> _ ___. <br /> __ ___ _ <br />