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PUMP SELECTION PROCEDUK[: <br /> A. Determine pump capacity: ' <br /> Gravity Distribution END PERFORATION OF A PER�ORATED LATERA� <br /> 1. Minimum su�ested is 600 gallons per hour(10 gpm) to stay ahcad of �-c�ou co�., <br /> water use rate. -�-----k- - � _ �_ <br /> �� ToDaoil <br /> 2. Maximum su�gested for dclivery to a drop box of a home system is 2,700 ���-r-__--r_-���-__ <br /> Loyar ol Geoustile Fabrlc (a ta,r• <br /> gallons per hour(45 gpm)to prevent build-up of pressurc in drop box. . �oamY so�a�Y�, �;,�h,aY�,o,,�,„,,,o„��,red <br /> • � . , with red rosin paper) <br /> � <br /> erTrqe o�e�a�r,�"-�'erlurotiuo Orlllyd Hon�oNolly <br /> Pressure Distribution ,r �����«�-•�••� .���o �oo �a� Top <br /> 3. a. Sclect number of erforated laterals �:P��� �_� n� Leua �z•�o «o� <br /> L P LD�oin Fleld Rock,u� _����;� 01 17ock layer <br /> V. SC'�CCt pC'1'fOr8t1O11 Sp8Cli1�= ft. � � \ -p�rluratiuns Luculyd ol <br /> c. Subtract 2 ft. from thc rock laycr icn�th. e�.a�Sond Layer B°"°^�°' ���••�� <br /> « aY�.��� -2 ft.= ft. <br /> -Orlpinal Soll P�operly Scarlfitd <br /> Before f'laci�q Sard Loycr <br /> d. Determine thc number of spams bctwcen perforations. <br /> Length perf.spacing= ft.+ ft.= Sp1CCS TAiiI.F.OP PGRPORATION DISCFIARCL•S 1N Cl'M <br /> e. spaces+ 1 = perforations/latcral <br /> ' f. Multiply perforations per latcral by number of laterals to Ncad Pcrforation diameter(inches) <br /> get total number of perforations. - - - <br /> .�t e�ra X �a - p�rforations. ��'2 ��� --- <br /> pe tenl �'` <br /> 1.Oa 0.56 0.74 <br /> l.5 0.69 0.90 <br /> �• �r, X g�,�'�r- SPm• 2.ob o.so i.oa <br /> 2.5 0.89 1.17 <br /> 3.0 0.98 1.28 <br /> SELECTED PUMP CAPACITY gpm q.0 �.t3 t.q� <br /> 5.0 ].26 1.65 <br /> B.Determine head requirements: <br /> ++Ur+e 1 A foot of head for residential systems. <br /> 1. Elevation diffcrence between Ump c�tld pOlilt Of c11SC}l�li�e. bUse 2.0 feet of head for othcr establishments <br /> �_feet <br /> 2. If pumping to a pressure distribution system,add fivc feet for pressure <br /> required at manifold <br /> � feet <br /> 3. Frietion loss Pipe Leng�h <br /> � <br /> a. Enter friction loss table with gpm and pipe diameter. � I'oint of Disd�argc <br /> Read fri tion lo n feet per 1(l�fect from table. <br /> F.L._���/100 ft of pipc I Elevation Uiffcrence <br /> b. Determine total i len th from um to dischar re � I <br /> P P� g P P b I ump <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitting loss chart. Equivalent pipe i F-18b <br /> length-1.25 Nmes pipe length= 1.5 inch 2.0 inch 3.0 inch <br /> �_X I.Z�J=�„�fCCt s�rp Friction loss�u:r 100 ft ot pipc <br /> c. Calculate total friction loss by multiplying l0 0.69 0.20 <br /> friction loss in ft/100 ft by equivalentFipc length. 12 0.96 0.28 <br /> Total friction loss= '� �.' x .�:S�=100=�feet 14 1.28 0.38 <br /> 4. Total head required is the sum of elevatioil difference, 16 1.63 0.48 <br /> 18 2.03 0.6U <br /> spccial head requirements,and total friction loss. 20 2.47 0.73 0.11 <br /> _�+ _� + � 3.73 0.16 <br /> 30 5.23 1:55 / 0.23 <br /> 7.90 -86� 0.30 <br /> (1) (2) (3c) 40 11.07 2.64 0.39 <br /> 45 14.73 3.28 ().48 <br /> TOTAL HEAD ��feet 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> 60 5.60 0.82 <br /> �. 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 />