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U�iversifiy of Minnesota Pump Selection Procedure - 10/25104 <br /> Ali boxed�e�angles must be eFltered,the resf wiil be calculated. <br /> �:.. � <br /> . QIV3R'll"� <br /> 9. �e�ermine pump capacif.y: ��.��. <br /> A Gravity Distribu�ion P�'�"° �` <br /> 1.Minimum required d�scharge is 10 gpm <br /> 2.Nlaximum suggested di�arge is 45 gpm <br /> For other establistaments at least 10i6 greater thar�the water <br /> suppiy rate,but no faster t�an the rate at which e�luent wili flow <br /> out of the distribu6on devi�. <br /> B. PfeSSUt�D'ISh1bUtiOR-S2e ENeSSUf2 d2Sig[1 wO�IcShe2t soU treat-nent sysiem <br /> .r'�c poittt�f discharge <br /> ;s��:��;;F:..,�ii <br /> Selected Pump Capacity: 47 gpm totai�Pe j <br /> length j <br /> fnlet � t 2A.elevction i <br /> 2. Determine Total Dynamic Head(TDH) �,;� �3 E differe�ce� <br /> {� -------- -- - � <br /> A. Elevation difference between pump and point of discharge. i�._.__............ ._a <br /> �{�t `��` � ---------------------------------- <br /> B. Speaal head requirement?(See F'�gure-Special Head Requi�ments) <br /> ��feet Speaal Head Require�nents <br /> Grav�ty Distribution Oft <br /> C. Fricfion toss in supply pipe Presstue Distribufion 5ft <br /> 1. Select pipe diameter �in <br /> 2. Enter Figure E 9 with gpm(1A or B)and pipe diamefier(C1) <br /> Read fiction loss in feet er 100 feet from Figure E-9 E-9 Friction Loss m Plastic P'ipe <br /> Friction foss= 3.99 f�/1Q0 ft of pipe per�pp R <br /> nominal <br /> 3.Determine total pipe length from pump discharge to soil system d�scharge point Flow Rate i diameter <br /> Estimate by adding 25 percent to pipe length for frictioo loss in fittings. pm 1.5° 2.0" 3° <br /> Pi len th times 1.25=eauivalent pipe tength 2(�' 2•:47 0:73 0.'t't <br /> 213 ft x 1.25= 266.25 feet 25 3.73 1.19 0.16 <br /> 34 5":23 1:a5 U23 : <br /> 4.Calculate total fiction loss by mulbplying fiction loss(C2) 35 6.96 206 0.3 <br /> by the equivalent pipe length(C3j and divide by 700. 4t3 8:99 2,54 Q,39 ; <br /> Friction Loss= 3.99 ft1100ft X 266.25 ft / 1Q0= 70.6 feet 45 11.07 3.28 0.48 <br /> 5Q' 13.46 3.99 U.58 <br /> _ <br /> D. Total head requirement is the sum of elevafion d"ifference(A),speaal 55 4.76 0.7 <br /> head requirements(B),an�total fiction loss(C4). �p 5.g p.gg ' <br /> 22 �t + 5 ft + 11.0 ft 65 6.48 0.95 <br /> 70 7.44 '[.09 <br /> Total Head: 38.0 feet <br /> �. Pump Selection <br /> 9.A pump must be selected to deliver at least 47 gpm(1A or B) <br /> wi�h at least 38.0 ieet of i�tal head(2D). <br /> I hereby certify thaf I have com�fefed€fiis u+�xk in accordance with ail appficabfe ord'm�ces,rules and laws. <br /> (signature) 810 (license#) 5111/08 (Date) <br /> � . <br /> v <br /> Page 1 of 1 <br />