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PI1MP SELECTION PROCEDURG <br /> A. Determine pump capacity: <br /> Gravity Distribution � ���T�� � A PERFORATEO IATERAL <br /> 1. Minimum su�ested is 600 gallons per hour(10 gpm)to stay ahead of ��.,..c,.., <br /> �!� 1 _t'__2 + t_ <br /> WdtCT USe rBtC. T�� � ; <br /> 2. Maximum suggested for dclivery to a drop tmx of a home system is 2,700 , <br /> � Layn of Geolalile FaDrk(a lov- <br /> gallons per hour(45 gpm)to prevent build-up of pressurc in drop box. . ��,,,,,sa„e,,,,.. ��,,,„,,,,„r«w.a,.�a�.a <br /> N��..a.a���� <br /> er_a9,� qJan -Palaoibn pllhd Ilor�romonr . <br /> Pressure Distribution �;,��"' "`'� "��"'°`°D '"°' �0 <br /> � ���-A1 leasl 12'lo EJpe <br /> 3. a. Select numbcr of perforated laterals ji;ao.��Fi�a r+oY� „•`•' oi Rocr wrer <br /> b. Select perforation spacing= ft. � ` <br /> -Pvfurolions Lotol�d ol <br /> c. Subtract 2 ft.from thc rock laycr length. c,.���w�,,, eo���ol La1�ro1 <br /> ,.�. ��, -2 ft.= ft. <br /> wbi�oi son woM,i,swr�r�a <br /> e.�u.v�«Np suna LoYa <br /> d. Determine the number of spams betwcen perfarations. <br /> Length perf.spacing= ft.+ ft.= Sp�1CCS TABLF.OF PERi�ORATION UISCI IARCfS 1N CI'M <br /> e. spaces+ 1 = perforations/lateral <br /> ' f. Muldply perforations per lateral by number of latcrals to t�tc,a Pcrforation diameter(inches) <br /> get total number of perforations. <br /> x - rforations. ��" ��� <br /> 1�� f tKil � . <br /> 1.Oa OS6 U.74 <br /> ]S 0.69 0.90 <br /> g. �� x g�„T�= gpm• z.ob o.so t.oa <br /> 2S 0.89 1.17 <br /> SELECTED PUMP CAPACITY� m 3.0 0.98 t.2s <br /> gp 4.0 ].13 1.47 <br /> 5.0 ].26 1.65 <br /> B.Determine head requirements: <br /> 1. ElevaHon difference between um and �int of dischar e. aUse l.0 foot of head for residentlal systems. <br /> bUse 20 feet of head for othcr est�blishments <br /> �� pfeet � <br /> 2. If pumping to a pressure distribution systcin,add fivc feet for pressure <br /> required at manifold <br /> �feet <br /> 3. Frietion loss Pipe Leng�h <br /> I ' <br /> a. Enter fricrion loss table with gpm and pipc diametcr. Poinc oC D;scharbe <br /> Read friction loss in feet per 100 fect from tablc. <br /> F.L.= 3,qq ft./100 ft of pipe Elevation Diffcrence <br /> b. Determine total pipe length from pump to discharge p„n,p <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitting loss chart. Equivale»t pipe F-18b <br /> length-1.25 times pipe length- 1.5 inch 2.0 inch 3.0 inch <br /> //O x1.25=�fcct �p�, r-��u;d,i��ioon�rP�� <br /> c. Calculate total fricHon loss by multiplying 10 0.69 0.20 <br /> friction loss in ft/100 t by equivalent ipc length. 12 0.96 0.28 <br /> Total friction loss= �x � q +1(H)= s feet 14 1.28 0.38 <br /> 4. Total head required is the sum of elevation diffcrcnce, jg 2.03 0.60 <br /> special head requirements,and total friction loss. 20 2.47 0.73 0.11 <br /> � + � + Z� � 3.73 1.11 0.16 <br /> 30 5.23 1.55 0.23 <br /> 35 7.90 2.06 030 <br /> (1) (2) (3c) 40 11.07 2.64 0.39 <br /> 45 14.73 28 0.48 <br /> TOTAL HEAD �feet � 0.58 <br /> 35 . 6 0.70 <br /> 60 5.60 0.82 <br /> ^. Pump selection <br /> 1. A pump must be selected to deliver at least�gp�n (Step A) <br /> with at least�feet of total head (Step B). <br />