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PL�P SELECTION PROCEDURE <br /> A. Determine pump capacity: � <br /> Gravity Distribution ENO PERFORATION OF A PERFORATED IATERAL <br /> l. Minimum su�ested is 600 gallons per hour(l0 gpm)to stay ahcad of �.�„„�,,,., <br /> water use rata . ' <br /> reowu �,�� <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 =-`-, ,. , �.-� <br /> Sallons r hour(45 TTI� t0 revent build-u pf 1'CSSUTC lil CjTO bOX. � �bm �� � �°w'e�oesu.iu�Fark ta rwr- <br /> P� $P P P P P r �w►� ����a.,.�i,.,«�«e.�«.�N <br /> .�,e.ce,wM oeo«) <br /> rr wq�e �� PNloro�Nn dNhO/1M�»NINI� ' <br /> Pressure Distribution ,.y+� �-•••• ��o�ao �� Ho <br /> � <br /> 3. a. Sclect number of perforated laterals � �i'%�w . �-�� ��«� ��'�•� <br /> .�QraM fllld W�t� •1 Mck.lapn� <br /> b. Selcct perforation spacing= � ft. P„r,�,,,��,�.� <br /> c. Subtract 2 ft. from thc rock laycr len�th. ��a�w�,�, e."°^..' �.,.ro' <br /> �-2ft.=�_ft. <br /> aiylnel sel� hep�rlr Sc«irNd <br /> Be1ae VlecNp Serd�eyer <br /> d. Determinc the numbcr of spa!rs betwcen perforations. <br /> Length perf.spacing=�3,ft.+ ? ft._�spaces TAi3LE OP i'LRTaORA770N DISCHARCES IN CPM <br /> c. �spaccs+ 1 =_I Si perforations/latcral <br /> ' f. Multiply perforations per lateral by number of laterals to Hcad Pcrforation diameter(inches) <br /> g�et total number of perforations. _ <br /> �C� x � � rforations. ��" '�' <br /> '. . �...�- `' P� . <br /> �.oa a.s� o.�a <br /> �' � "a.�= U D gpm. �s o.�9 0.90 <br /> x.ob o.go �.o� <br /> 2S 0.89 1.17 <br /> SELECTED PUMP CAPACITY 4 (� 3.0 0.98 1 Z8 <br /> 8Pm 4.0 1.13 1.47 <br /> 5.0 1.26 1.65 <br /> ._ _ B.Determine head requirements: <br /> l. Elevation difference between u and int of dischar e. aUu 1.0 foot of head for midentiet systenu. <br /> p p � s bUse 2.0 feet of head for other at�biishments <br /> �feet <br /> 2. 1f pumping to a pressure distribution system,add five fect for pressum <br /> mquired at manifold <br /> S feet . <br /> 3. Friction loss Pipc Leog�h . <br /> a. Enter fricNon loss table with gpm and pipe diamctcr. � Point of Discharge <br /> Read friction loss in fect per]00 fect fro�n table. `Y� <br /> F.L.= a.L ft./]00 ft Of pipe Elevaticm Uiffercnce <br /> b. Determine total pipe length from pump to discharge �P y� <br /> point. Add 25 percent to pipe len�th for fitting <br /> loss,or use a fitting loss chart. Equivalcnt pi}xr F-18b <br /> length-].25 rimes pipe length= <br /> /� 1.5 inch 2.0 inch 3.0 inch <br /> ' /_� X I.ZJ= �/y- ECCt s� Friaim loa pct 100 ft of Phb <br /> c. Calculate total friction loss by multiplying 10 0.69 0.20 <br /> friction loss in ft/]00 ft by equivalent pipe length. 12 0.96 0.28 <br /> Total friction loss= �•�'i x �7 y +7pp¢_�_feet 14 1.28 0.38 <br /> 4. Total head required is the sum of elevati�n diffemncc, �6 ].63 0.48 <br /> special head requirements,and total friction loss. �g 2.03 0.60 <br /> 20 2.4� 0.73 O.11 <br /> 25 3.73 1.II O.16 <br /> �_+ S� '+�_ 30 5.23 l.55 0.23 <br /> �1� �2� ��3c� 35 7.90 2.06 0.30 <br /> 40 11.07 2.64 0.�9 <br /> 45 14,�3 3.28 0:48 <br /> TOTAL HEAD 1 ti' feet SO 3.99 0.58 <br /> . 55 4,76 0.70 <br /> 60 5.60 0.82 <br /> -' ^_. Pump selection <br /> �. A pump must be selected to deliver at least ti o gpm (Step A) <br /> with at least 1 .� feet of total head (Step B). . <br />