Laserfiche WebLink
' � ' ' ` � PUMP SELECTION PROCEDURE <br /> 1. B�termine pump capacity: <br /> ,-�..,.,A. Gravity distribution <br /> 1. Minunum required discharge is 10 gpm . <br /> 2. Maximum suggested discharge is 45 gpm. For other <br /> establishments at least 10%greater than the water supply rate, <br /> but no faster than the rate at which effluent will flow out of the <br /> distribution device. <br /> B. Pressure distribution <br /> See pressure distribution work sheet <br /> From A or B Selected pump capacity: �_gpm <br /> 2. Determine pump head requirements: <br /> A. Elevation difference between pump and point of discharge? wil treatment system <br /> 1Z feet &p b�nt of disch�a�rg� <br /> B.Special head requirement?(See Figure at right-Special Head Requirements) 1enol pipe <br /> 9 <br /> �_feet 2A.elevation <br /> inlet difference <br /> C. Calculate Friction loss P�PQ <br /> ------- -- - <br /> 1. Select pipe diameter �.t� in ��,'t� <br /> 2. Enter Figure E-9 with gpm(lA or B)and pipe diameter(Cl). <br /> Read friction loss in feet per 100 feet from Figure E-9 Speciai Head Requirements <br /> Friction Loss= 3.� ft/100ft of pipe Gravity Distribution 0 ft <br /> 3. Determiile total pipe length from pump discharge to soff treatment Pressure Distribution 5 ft <br /> discharge point. Estimate by adding 25 percent to pipe length for <br /> fitting loss. Total pipe length times 1.25=equivalent pipe length E-9:Friction Loss in Plastic Pipe <br /> 3�o feet x 1.25 = �S� feet Per 100 teet <br /> 4. Calculate total friction loss by multiplying friction loss(C2) nomtnal <br /> in ft/100 ftby the equivalent pipe length(C3) and divide by 100. pipe diameter <br /> = 3•� ft/100ft x `i S�: +100=�_ft flo mrate 1.5" 2" 3" <br /> D. Total head required is the sum of elevation difference(A),special � 2.47 0.73 0.11 <br /> head requirements (B),and total friction loss (C4) 25 3.73 1.11 0.16 <br /> _�Z _ft+ S ft+�_.ft= 30 5.23 1.55 0.23 <br /> 35 6.96 2.06 0.30 <br /> Total head: _,`�.�' feet ao s.9i 2.6a o.39 <br /> 3. Purnp selection as >>.o� s.28 o.as <br /> 50 13.46 3.99 0.58 <br /> 55 4,76 OJO <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) 65 6.48 0.95 <br /> 70 7.44 1.09 <br /> I hereby certity that I have completed this work in accordance with applicable ordinances, rules and laws. <br /> ��1�►---`�..`� � (signature) � (license#) � 1 - ) -t�� (date) <br /> � <br />