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A. Deleratine pump capacity: <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 2,7W <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 <br />b. Select perforation spacing = ft. <br />c. Subtract 2 ft. from the rock layer length. <br />1gtC'TZ - 2 ft. _ I - It. <br />d. Determine the number of spaces between perforations. <br />Length pert. spacing = _ ' ft. + ' ft. _ I - spaces <br />e. 1 % spaces + 1 = perforations/lateral <br />f. Multiply perforations per lateral by number of laterals to <br />get total number of perforations. <br />sir. x �_ J perforations. <br />g- � x Wwrpm _- gpm. <br />SELECTEU PUMP CAPACITY gpm <br />E. Determine head requirements: <br />A. 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 />feet <br />3. Friction loss <br />a. Enter friction loss table with gpm and pipe diameter. <br />Read friction loss in feet per 100 feet from table. <br />F.L. - . ,,- 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 />q _ x 1.25 - - feet <br />C. Calculate total friction loss by multiplying <br />friction loss in ft/100 ft by equivale-,i pipe length. <br />Total friction loss = _ x +100 = feet <br />4. Total head required is the sum of elevation difference, <br />special head requirements, and total friction loss. <br />_ + + _ <br />(11 (2) 430 <br />TOTAL HEAD feet <br />C. Pump selection <br />1. A pump must be selected to deliver at least _ gpm (Step A) <br />with at least feet of total head (Step B). <br />ENO PENrORA110N OF A PEWORArM LATERAL <br />an. Cam <br />T.aaa <br />`� aw ts� , l,wu M ONMa1M iMrk to 1w <br />Y�i W�w� r � owwN <br />rn.r <br />' - FUNW611ma combo Nruu.�.ar <br />mac :e an" urr Edge <br />Par' - bw"d of <br />ra Some •are stun r L..w <br />arwr. Prrr,e see ar <br />TABLE OF PERFORATION DISCHARGES IN GPM <br />Head Perforation diameter (rohs) <br />1.0a <br />036 <br />074 <br />13 <br />0.69 <br />0.90 <br />2.Ob <br />0./0 <br />144 <br />23 <br />ON <br />1.17 <br />3.0 <br />0.98 <br />122 <br />4A <br />1.13 <br />1.47 <br />SA <br />1.26 <br />IAA <br />aUa IA foot of Mad lot seaider�tlal yalnna. <br />bUn 2A tat of Mad for other ashbba wwob <br />Pipe Length <br />i <br />Point of DDisch e <br />Elevation Diffexer m <br />DINAMP <br />F-18b <br />I .s inch 2.0 inch 3.0 inch <br />am Riai'w ter par 10D R at Pip <br />10 <br />0.69 <br />0.20 <br />12 <br />0.96 <br />0.28 <br />14 <br />1.28 <br />0.3" <br />16 <br />1.63 <br />0.4r. <br />18 <br />2.03 <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 />3.23 <br />1.55 <br />0.23 <br />35 <br />7.90 <br />2.06 <br />o.30 <br />40 <br />11.07 <br />2.64 <br />0.39 <br />45 <br />14.73 <br />3.28 <br />0.48 <br />so <br />3.99 <br />0.59 <br />ss <br />4.76 <br />0.70 <br />60 <br />5.60 <br />0.92 <br />