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_ � i�;� <br /> OSTP Pump Selection Design UNiVERStTY <br /> Minnesota Poliution� WO�kShCet OF MI N\ESOTA <br /> CoMro)A n <br /> 10. Equivalent length of pipe fittings. Equivalent Length Factors(ft.)for PVC Pipc <br /> Fittings <br /> Section l0 is for Collection Systems ONLY and does NOT need to be Pipe Diameter(in.) <br /> co�leted for individual wb.wrface sewage treatment systems. Fitti�g Type �.y� 2 3 <br /> Quantity X Equivatent Length Fador=Equivalent Length Gace val�e �.07 t.3s 2_oa <br /> 90 Deg Elbow 4.03 S.i7 7_67 <br /> Fitting Type Quantity Equiva{ent Equivaler�t 45 Deg Elbrnv '.15 2.76 4.09 <br /> Length Factor Length(ft) Tee-Ran Thru .68 3.45 5.17 <br /> Tee-Branch Fta�u 8.05 i0.30 t5.30 <br /> Gate Valve X � Sv��tng Check Yatve 13_4L 17.20 25.50 <br /> 90 Deg Elbow X = lu�gle Vatve 20_1U �.Si4 38.40 <br /> Globe�'alve 45.6Q 58.60 86.90 <br /> 45 Deg Elbow X a Butterfty valve - 7J5 1 i.50 <br /> Tee-Row Thru X ` <br /> Tee-Branch Ftow X = NOTE:Equivatent length values for PVC pipe <br /> fittings are based on caiculations using the Hazen- <br /> Swing Check Valve X ' Williams Equation. See Advanced Designs for SSTS <br /> Mgle Valve X = for equation. Other pipe material may require <br /> X different equivalent length factors. Verify other <br /> Globe Vatve ' equivatent tength factors with pipe material <br /> Butterfly Valve X = manufacturer. <br /> Valve 10 X = NOTE:System instalter should contact system <br /> designer if the number of fittings varies from the <br /> Valve 11 X - desi�n to the actual instaltation. <br /> A. Sum of Equivalent Length due to pipe fittings: ��ft <br /> Hazen-Williams Equation for h <br /> B. Total Pipe Length =Suppty Pipe Length(5.6)+Equivalent Pipe Length(9.A.) 1�.5 <br /> (� ft +�} ft _ �ft h.f D4.87 *�Q-C�1.85 ,k L <br /> 1-.-_J t_-� <br /> �, Hazen-Wiltiams friction loss due to pipe fittings and supply pipe(hf): Q in gpm L in feet D in inches C=130 <br /> (10.5 = Pipe Diameter°'87) X ( Flow Rate : Constant)'�� X Total Pipe Length(10.6) <br /> a.s� X m=130'� X ��ft -��ft <br /> (10.5 : C�in ) (��9P ) � <br /> 11. Total Head requirem�t is the sum of the Elevation Difference (Line 3),the Distribution Head Loss(Line 4),Additional Head Loss(Line 5), <br /> and either Supply Friction Loss(Line 9),or Friction Loss from the Suppty Pipe and Pipe Fittings for collection systems(Line 10.C) <br /> NOTE:Suppl y Friction Loss(Line 8)need ONLY be used if NOT o cdlection system. <br /> NOTE:Friction Loss from the Supply Pipe and Pipe Fittings(Line 9.C)need ONLY be used if system is a co(lection system. <br /> 11.0 ft + 5.0 ft + �ft + 4.2 ft = 20.2 ft <br /> 3. PUMP SELECTION <br /> A pump must be selected to deliver at least 36 GPM(Line 1 or Line 2)with at least 2� feet of total head. <br /> Comments: Gould Pump We03m <br />