Laserfiche WebLink
� i • r� PUMP SELECTION PR4C�DURE <br /> 1. Determine pump capacity: <br /> �,,A. Gravity distribution <br /> ' 1. Minimum required discharge is 10 gpm . <br /> 2. Maximum suggested discharge is 45 g�m. For other <br /> establishments at least 10%greatei 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: 4� gpm <br /> 2. Determine pump head requirements: <br /> A. Elevation difference between pump and point of discharge? so�treatment system <br /> & int of discharge <br /> 1�,_feet a;.:.�>., 1`S <br /> B. Special head requirement?(See Figure at right-Special Head Requirements) �nal pipe <br /> 9 <br /> �_feet 2A.elevation <br /> fnlet difference <br /> C. Calculate Friction loss P�pe <br /> ------- -- - <br /> 1. Select pipe diameter � in """"--��" " <br /> .......................... .......�o� <br /> 2. Enter Figure E-9 with gpm(lA or B)and pipe diameter(Cl). <br /> � Read friction loss in feet per 100 feet hom Figure E-9 Special Head `Requirements <br /> Friction'Loss= �/F � ft/100ft of pipe Gravity Distribution 0 ft <br /> 3. Determule total pxpe length from pump discharge to soil treatment ?ressure Distribution 5 ft <br /> discharge point.Estimate by adding 25 percent to pipe length for <br /> fitting lvss.Total pipe length times 1.25=equivalent pipe length E-9:Frictlon loss in Plastic Pipe <br /> 7� feet x 1.25 = 4 � feet Per 100 teet <br /> 4.Calculate total fricdon loss by multiplying friction loss(C2) nominal <br /> in ft/100 ft,by.the equivalent:pipe length(C3) and divide by 100. pipe diameter <br /> = 3 •V ft/100ft x �6�f +100= � ft flow rate 1.5" 2" 3" <br /> m <br /> ' D. Total head required is the sum of elevaHon difference(A),special 20 2:47 0.73 0.11 <br /> head requirements(B);and total friction loss (C4) 25 3J3 1.11 0.]6 <br /> t�-I ft+ 5 ft+�_ft= , 30 5.23 1.55 0.23 <br /> 35 6.96 2.06 0.30 <br /> Total head: a� feet - � ao s.9� 2.ba o.39 <br /> 3. Purnp selection as �i.oz s 28 o.as <br /> 50 13.46 3.99 0.58 <br /> 55 4J6 0.70 <br /> A pump must be selected to deliver at ieast�.gpm - bp 5.60 0.82 <br /> (1A or B)with at least�_feet of total head (2D) �,5 6.48 0.95 <br /> 70 • 7'.44 1.09 <br /> I hereby certify that I h ve completed this work in accordance with applicable ordinances, :rules and laws. <br /> . � (signature) 3'?�-I (license#) �� "�`��oJ' (date) <br />