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i <br /> '� '�'�� PUMP SELECTION�PROCEDURE <br /> , <br /> . � <br /> 1. Determine pump capacity: j <br /> , - -;A. Gravity distribution j <br /> I. Minimum required discharge is 10 gpm i . <br /> 2. Maximum suggested discharge is 45 gpm. For otljier <br /> estaUlishments at least 10%greater than the wate supply rate, <br /> but no faster than the rate at which effluent will fl�w out of the <br /> disriibution device. <br /> B. Pres�ure distribution � <br /> See pressure distribution work sheet � <br /> I <br /> , <br /> From A or B Selected pump capacity: �gpm <br /> �. Deternnine pump head requirements: � <br /> A.Elevativn difference between pump and paint of dis�hargQ? soi treoiment system <br /> �_feet i & t of�rge <br /> i ��� <br /> B.Special head requirement?(See Figure at righf-Special Head Requirements) total pipe <br /> � feet inlet � 2A.elevation <br /> G Calculate Friction loss pipe <br /> difference <br /> 1. Select pipe diameter�_in --- q � <br /> ----•---••----------------- ------� <br /> ` 2. Enter Figure E-9 with gpm(1A or B)and pipe dia�eter(Cl). <br /> Read friction Ioss in feet per 100 feet from Figure �-9 Special Head Requf�ements <br /> Friction Loss= �•� ft/100ft of pipe Gravity Distribution 0 ft <br /> 3. Deternnine total pipe length from pump discharg to soil treatment Pressure Distribution 5 ft <br /> discharge point.Estimate by adding 25 percent t pipe length for <br /> fitting loss.Total pipe length times 1.25=equival nt pipe length E-4:Friction lou in Plastic Pipe <br /> "ls feet x 1.25= l 1°I feet i <br /> � Per 1�feet <br /> 4.Calculate total friction loss by multiplying friction loss(C2) nominai <br /> in ft/100 ft by the equivalent pi�e length(C3) and,clivide by 100. pipe diameter <br /> = a•S ft/100ft x 1 � +100= '� I ft ftow rate 1.5" 2° 9" <br /> m <br /> � D. Total head required is the sum of elevation differen�e(A),special � 2•47 0.73 0.11 <br /> head requu-ements(B),and total friction loss (C4) � 25 3.73 1.11 0.16 <br /> �ft+_ � ft+ a ft= � 30 5.23 1.55 0.23 <br /> � 35 6.96 2.06 0.30 <br /> Total head• feet � ao a.9i 2.ea o.39 <br /> 3. Pump selection a5 i�.o� 3.2s o.as <br /> � 50 13.46 3.99 0.58 <br /> I 55 4.76 0.70 <br /> A pump must be selected to deliver at least,'�gpm bp 5.60 0.82 <br /> (1A or B)with at least�_feet of total head (2D� 6,5 . 6.48 0.95 <br /> � 70 7.44 1.09 <br /> I hereb certify th 1 hav co gleted this work in accord ce with applicable ordinances, rules and laws. <br /> 4+�"�'• i ature I �'! license# '' "`Q date <br /> �"�'-'f�� ) ( ) ( ) <br /> _ j <br /> i <br />