Laserfiche WebLink
A. Determine pump capadty: <br />Gravity Distribution <br />1. Minimum suggested is 600 gallons per hour (10 gpm) to stay ahead of <br />water use rate. <br />2. Maximum suggested for delivery to a drop box of a home system is 2,700 <br />gallons per hour (45 gpm) to prevent build-up of pressure in drop box. <br />Pressure Distribution <br />3. a. Select number of perforated laterals 3 <br />b. Select perforation spacing - ft. <br />c. Subtract 2 fL from the rock layer length. <br />- 2 ft. as '.'. ft. <br />d. Determine the number of spaces between perforations. <br />Length pert. spacing = IJt. ft. +2 ft. _ spaces <br />e. spaces+ 1 = _ perforations/lateral <br />f. Multiply perforations per lateral by number of laterals to <br />$et total number of perforations. <br />tea x �_ � perforations.pau <br />SL- <br />g' � x-.PAw. =2" gpm. <br />SELECTED PUMP CAPACITY 71-1_ gpm <br />B. Determine head requirements: <br />1. Elevation difference between pump and point of discharge. <br />/_ feet <br />2. If pumping to a pressure distribution system, add five feet for pressure <br />required at manifold <br />c feet <br />3. Friction loss <br />a. Enter friction loss table with gpm and pipe diameter. <br />Read friction loss in feet per 100 fret from table. <br />F.L. = 7.1. ft./100 ft of pipe <br />b. Determine total pipe length from pump to discharge <br />point. Add 25 percent to pipe length for fitting <br />loss, or use a fitting loss chart. Equivalent pipe <br />length -1.25 times pipe length = <br />1 stf _ x 1.25 = a' I feet <br />c. Calculate total friction loss by multiplying <br />friction loss in ft/100 ft by equivalent pipe length. <br />Total friction loss = ':. 1. x . I +100 = �_ feet <br />;. Total head required is thv sum of c:- .:::on .i;t*:crq. twe, <br />svecial head requirements, and total friction loss. <br />+ +_(. <br />(1) (2) i30 <br />TOTAL HEAD feet <br />C. Pump selection <br />I. A primp must be selected to deliver at least gpm (Step A) <br />with at least feet of total head (Step BY <br />EM PERFORATION OF A PERFORATED LATERAL <br />� anw Cover <br />T"Wd <br />Lamar /w Low <br />N GOSWIft Feark Iw %W- <br />wrwr towed <br />NowNWa ONW 11w/1m401r <br />ww Tie <br />M LOW 12' 1a Ed" <br />m1 Ita[L ta„r <br />v-►arlwMLM taa/ae 01 <br />Clem aw+e tarty Muwm N tarwml <br />artyrl s.a Pnow" aewtlled <br />tt.w. ►leas SOW L•rw <br />`t>_ili��I�;13:�•7'��[��.lTr_•iii:��•la�i`� i� <br />Head Perforation diameter (Inches) <br />./, <br />14 <br />1.08 <br />036 <br />0.74 <br />13 <br />0,69 <br />0.90 <br />2.Ob <br />0.80 <br />l N <br />23 <br />029 <br />1.17 <br />3.0 <br />0.98 <br />128 <br />4.0 <br />1.13 <br />1.47 <br />S.0 <br />126 <br />1bS <br />&Use 1.0 foot of head for residential systems. <br />bUse 2.0 fact of head for other establishments <br />Pipe Length <br />a <br />Point of Discharge <br />TTrv1z <br />Elc�a6on Difference) <br />pump 9' <br />V l8b <br />1.5 inch 2.0 inch 3.0 inch <br />9Pm Frkslw law Par too n of Pipe <br />10 <br />0.69 <br />0.20 <br />12 <br />0.96 <br />0.28 <br />14 <br />1.28 <br />0.38 <br />1 16 <br />1.63 <br />OAS <br />18 <br />2.0 <br />0.60 <br />20 <br />2.47 <br />0.73 <br />0.11 <br />25 <br />3.73 <br />1.11 <br />0.16 <br />30 <br />5.23 <br />1.55 <br />0.23 <br />35 <br />7.90 <br />7.06 <br />0.30 <br />40 <br />11.07 <br />2.64 <br />0.39 <br />45 <br />14.73 <br />3.28 <br />0.48 <br />50 <br />3.99 <br />0.58 <br />55 <br />4.76 <br />0.7U <br />60 <br />5.60 <br />0.82 <br />