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� OSTP Pump Selection Design . LINIVERSITY ;��, .' Minnesota Pollution Worksheet OF MINNESOTA �"'� ` - Control A enc � 1 1"Y 10, Equivalent length of pipe fittings. Equivalent Length Factors (ft.)for PVC Pipe Fittings Section 10 is for Col(ection Systems ONLY ond does NOT need to be ' I Pipe Diameter(in.) completed for individual subsurface sewage treatment systems. ; Fitting Type �,� 2 3 Quantity X Equivalent Length Factor=Equivalent Length ' Gate valve i.o7 1.38 2.oa 90 Deg Elbow 4.03 5.17 7.67 Fitting Type Quantity Equivalent Equivalent 45 Deg Elbow 2.t5 2.76 4.09 Length Factor Length(ft) Tee-Flow Thru 2.68 3.45 5.11 Tee-Branch ftow 8.05 10.30 15.30 Gate Valve X - Swing Check Valve 13.40 17.20 25.50 90 Deg Etbow X = Angle vatve 20.10 25.80 38.40 ; Globe Vatve 45.60 58.60 86.90 45 Deg Elbow X - Butterfly valve - 7.75 11.50 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 Valve X - Williams Equation. See Advanced Designs for SSfS Angte Valve X = for equation. Other pipe material may require Globe Valve X = different equivalent length factors. Verify other equivalent length factors with pipe material Butterfly Valve X = manufadurer. Valve 10 X = NOTE: System insta(ter should contact system Valve 11 X _ designer if the number of fittings varies from the desiqn to the actual installation. A. Sum of Equivalent Length due to pipe fittings: �ft Hazen-Williams Equation for h B. Tota(Pipe Length =Supply Pipe Length (5.6)+Equivatent Pipe Length (9.A.) 1� j /1 = x ��_�11.55 :� � � ft + � ft = �ft I �a.S7 � C, Hazen-Williams friction loss due to pipe fittings and supply pipe(h�): Q in gpm L in feet D in inches C= 130 (10.5 .- Pipe Diameter'�e�) X ( Ftow Rate : Constant)'�85 X Total Pipe Length (10.6) (10.5 : �ina.8� � X (�9Pm=130)�.es X �ft =�ft 11. Toto(Head requirement is the sum of the E(evation Difference (Line 3),the Distribution Head Loss(Line 4),Additionat Head Loss(Line 5), and either Supply Friction Loss(Line 9),or Friction Loss from the Supply Pipe and Pipe Fittings for collection systems(Line 10.C) NOTE:Supp(y Friction Loss(Line 8)need ONLY be used if NOT a collection system. NOTE:Friction Loss from the Supply Pipe and Pipe Fittings(Line 9.C)need ONLY be used if system is a col(ection system. 7.0 ft * 5.0 ft + �ft + 1.1 ft = 13.1 tt 3. PUMP SELECTION A pump must be selected to deliver at least 38 GPM(Line 1 or Line 2)with at least 14 feet of total head. Comments: Pump type