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University of Minnesota Pump Selection Procedure - 10/25/04 <br /> All boxed rectangles must be entered,the rest witl be ca�ulated. <br /> OMs�ra <br /> 1. Determine pump capacity: T's�� <br /> A. Gravity DistribuGon P'�'�"" <br /> 1.Minimum required disc;harge is 10 gpm <br /> 2.Maximum sugg�sted discharge is 45 gpm <br /> For other establisNments at least 10%greater than the water i <br /> supply rate,but no faster than ihe rate at which effluent will flow <br /> out of the distribufion device. <br /> B. Pressure Distribution-see pressure design worksheet soll treatment system <br /> &poinf of discharge <br /> . �. `:F:"tf:i' <br /> ........... .. <br /> Selected Pump Capaaty: 50 gpm roroi�pe <br /> lengih <br /> 2A,elevatlon <br /> 2. Determine Total Dynamic Head(TDHj a� �;i �E difference <br /> ;r�-- - - ; <br /> A. Elewation difference beiween pump and point of discharge. .'s�. .- � <br /> � _..... _ ; <br /> 11 feet ::� F --------------------------- ----- <br /> g. Special head requirement?(See Figure-Special Head Requirements) <br /> �5 feet Special Head Requirements <br /> Gravity Distribution Oft <br /> C. Friction bss in su�ly pipe Pressure Distribution 5ft <br /> 1. Select pipe diameter �2 in <br /> 2. Enter Figure E-9 with gpm(1A or B)and pipe diamet�(C1) <br /> Read friction loss in feet 100 feet irom Figure E-9 E-9 Friction Loss in Plastic Pipe <br /> Friction loss= 3.99 ft/100 ft of pipe 100 ft <br /> nominal <br /> 3.De�errnine total pipe length from pump discharge to soil system discharge point. Flow Rate i diameter <br /> Estimate by adding 25 pe.roent to pipe length for fiiction loss in fittings. 1.5' 2.0' 3' <br /> Pi times 1.25=equiw�ent pipe length <br /> 82 ft x 1.25= 102.5 feet 25 3.73 1.11 0.16 <br /> ,� , , <br /> z - � � : <br /> ���.: . <br /> 4.Calailate total friction loss by multiplying friction loss(C2) 35 . 6.96 2.06 0.3 <br /> � � �t:-� � <br /> by the equivalent pipe length(C3)and divide by 100. ���`;�� �,��� y, <br /> Friction Loss= 3.99 ft/100ft X 102.5 ft / 100= 4.1 feet 45 11.07 3.28 0.48 <br /> � �s 3 >?,y�� �'�` x <br /> ;� .�e� ���� '�iT���,i• ,. . <br /> D. Total head requirement is fhe sum of eleva6on difference(A),special 55 4.76 0.7 <br /> �� {. , <br /> head requirements(B),and total ficctiion loss(C4). , , 6`�; -5.� „���2�.' <br /> 11 ft + 5 ft + 5.0 ft 65 6.48 0.95 <br /> ( •Vy1�.�� ���.' <br /> Total Head: 21.0 feet <br /> 3. Pump Selection <br /> 1.A pump must be selected to deliver at least 50 gpm(1 A or B) <br /> with at least 21.0 feet of total head(2D). <br /> I hereby ' that I have completed this wo�c in accordance with all applicable ordinances,rules and laws. <br /> / <br /> (signature) 810 (license#) 6I29/2006 Date <br /> Page 1 of 1 <br />