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` University of Minnesota Pump Selection Procedure - 1QI25/04 <br /> All boxed rectangles must be entered,the rest will be calculated. <br /> a�,� <br /> 1. Determine pump capacity: sE"""sE <br /> 'Frs�ar�iErer <br /> A Gravity Distribution �`"�R""' �' <br /> 1. Minimum required dscharge is 10 gpm <br /> 2. Maximum suggested discharge is 45 gpm <br /> For other establishments at least 10°,6 greater than the water <br /> supply rate,but no faster than the rate at which effluent will flow <br /> out of the distribution device. <br /> B. Pressure Distribu6on-see pm.ssure design woricsheet soi;treatme�t system <br /> � &pant o��charge <br /> � <br /> Selected Pump Capacity: 28.9 gpm totoi��e <br /> t2�,�'J,t'1 <br /> Irdef `�`"""� 2�`+.elevetlon <br /> 2. Determine Total amic Head D '��T������� � ��= d'ffe`r'"c2 <br /> � R � ��e :; �, <br /> A. Elevation difference between pump and point of�scharge. :� <br /> _. ..--_...... .. <br /> 17 feet r`� = ----------------�---------- ------ <br /> �:=_ � <br /> g. Special head rec�irement?(See Figure-Special Head Requirements) <br /> �feet Special Head Requirements <br /> Gravity Distribution Oft <br /> C. Friction loss in supply pipe Pressure Distribution 5ft <br /> 1. Select pipe dameter C2�in <br /> 2. Enter Figure E-9 with gpm(1A or B)and pipe diameter(C1) <br /> Read friction loss in feet per 100 feet from Figure E-9 E-9 Friction Loss in Plastic Pipe <br /> Friction loss= 1.55 ft!100 ft of pipe per 100 ft <br /> nominal <br /> 3. Determine total pipe length from pump d�scharge to sal system dschan�e point. Flow Rate pipe diameter <br /> Estimate by ad�ing 25 percent to pfpe length for#rict�on loss i�fittings. m 1.5" 2.0" 3" <br /> Pipe length times 1.25=equivaient pipe length ' �." " -�,�a ��}#�, �� <br /> 105 ft x 1.25= 131.25 feet ` 25 3.73 1 11 0.16 <br /> ;�� �� �� � ��-��.� <br /> �.� .� �� <br /> 4. Ca(culate total friction loss by multiplying friction loss(C2) 35 6.96 2.06 0.3 <br /> by the equivalent pipe length(C3)and divide by 100. y 3 V�'�` �$�`N��g�� <br /> Friction Loss= 1.55 #t/1QOft X 133.25 ft / 100� 2.0 feet � 45 11.07 3.28 �0.48 <br /> � .3.46 s��9�.�� <br /> D. Total head requirement is the sum of elevation difference(A),special 55 4.76 0.7 <br /> head requirements(B),and total friction loss(C4). :�,g �(}�� <br /> 17 ft + 5 ft + 2.0 ft 65 6.48 0.95 <br /> � �44y ������� <br /> Total Head: 24.0 feet <br /> 3. Pump Selection <br /> 1.A pump must be selected to deliver at least 28.9 gpm(1A or B� <br /> with at least 24.0 feet of total head(2D). <br /> I hereby certify that I have completed this worlc in accordance with all applicable ord�nances, rules and laws. <br /> � (signature} �p� (license#) �l� �a� (date} <br /> � Page 1 of 1 <br />