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, � I�� r r-�'C. r � � � OSTP Pump Selection Design UNIVERSITY Minnes�aPoilution Worksheet OF�INNESOTA Control A _: .. ... .... - _ _ 10. Equivatent tength of pipe fittings. "�"� µ� Section 10 is for Lcllection Systems ONLY and dnes NOT need to be ' completed for individuo!subsurface sewage treatment systems. �,` Quantity X Equivalent Length Factor=Equivalent Length ��'re �•� �•� �� ',��g, FittingType QuanNry Equivalent Equivalent rv AS Deg Elbow 2:1� 2.7.b .+d.Q9 Length Factor Length (ft) ee- ra cw Gate Valve X � 90 Deg Elbow X m Ar�gte Valve 20..10 25:80 38:A0 ' ,r,w 45 Deg Elbow X ` 8utterfly Va(ere - 7_75 11.SQ Tee•Flow Thru X ` Tee•Branch Flow X = NOTE: Equivalent length values for PVC pipe fittings are based on calculations using the Hazen- Swing Check Vatve X ` Wittiams Equation. See Advanced Designs for SSTS Angte Valve X � for equation. Other pipe materiat may require X different equivalent length factors. Verify other Globe Vatve = equivalent length faccon with pipe materiaL ButterFly Valve X � manufacturer. Valve 10 X . NOTE:System installer should contact system designer if the number of fittings varies from the Valve 11 X ` desiRn to the actuat instatlation. (��ft _ __.. _ _ _ -A. Sum of Equivalent Length due to pipe fitiings: I_J Hazen-Williams Equation for h B, Tota!Pipe Length =Supply Pipe Length(5.6)+Equivalent Pipe Length (9.A.) 1�.5 /-� � ft + L�� ft =�ft hf D4.87 � �L —C�1.85 *L �, Hazen•Williams friction loss due to pipe fittings and supply pipe(hf): Q in gpm L in feet D in inches C=130 (10.5 = Pipe Diamete�'67) X ( Flow Rate = Constant)''°� K Total Pipe Length (10.6.) (10.5 ' ��a.e�� X ��9Pm+130)�.as x r_---�ft ��ft 11. Tatal Head requirement is the sum of the Elevation Difference (Line 3),the Distribution Head Loss(Line 4),Additional Head Loss(Line 5), and either Supply Friction Loss(Line 9�,or Friction Loss from the Supply Pipe and Pipe Fittings for coUection systems (Line 10.C) NOTE:Supp[y Friction Loss(Line 8)need ONLY be used if NOT a collection rystem. NOTE:Friction Loss from the Supply Pipe and Pipe fittings(Line 9.C)need ONLY be used if system is a collection system. 11.5 ft + 5.0 ft + �ft + 1.6 ft = 18.1 ft 3. PUMP SELECTION A pump must be setected to deliver at least 3 3 GPM(Line 1 or Line 2)with at least �� feet of total head. Comments: Pump type ,' �. 'i il i � , ; _ ,. i;