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PUMP SELECTION PROCEDURE <br /> A. Determine pump capacity: <br /> � Gravity Distribution END PERFORATION pF A PERFORATED LATERAL <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of �,��,,,M <br /> water use rate. T��� <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 _ _ .. �"°' <br /> gallons r hour(45 m)to revent build-u of ressure in dro box. ``:;`i%..a c��..,u.faDrk(a tw- <br /> I� $P P P P p �' i.����,�.._.. .,���..a�,,a.W�a.�.w <br /> -. .�. ;.�.i�n.ea .oNe pap«) <br /> � �er•or I e a PwT w}otion OrilMd Horizonlollr <br /> Pressure Distribution � �,�o P r�a, �o <br /> 3. a. Select number of perforated laterals ;� ''�:�w , �, a ��•� �2•�o�o. <br /> . �Q'on FNie Rac �.. of Roct Lar�r <br /> b. Select perforation spacing= � ft. .. ,. : . ,, ., <br /> Perfvotlao Loco��d ol <br /> c. Subtract 2 ft.from the rock layer length. ��-� c�.�,spw,�,,.. �"°^�� ��•�a <br /> ���„�r� -2 ft._��ft. <br /> . �.�oMa+ son Proprir scarin.a <br /> B�lon Plockq So�d Loyer <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing= �� ft.+ � ft._ - � sPaces TAIIL.OF PERFORATION DISCHARCES IN CPM <br /> e. - - spaces+ 1 = = perforations/lateral <br /> ' f. Multiply perforadons per lateral by number of laterals to Head Perforationdiameter(inches) <br /> get total number of perforadons. ,� � , <br /> �� x ��_ ;.� perforaHons. " � <br /> i.oa osb o.�a <br /> g, -� X . �- - `�gpm �s 0.69 0.90 <br /> r�• aw� �- 2.ob o.so i.oa <br /> 2S 0.89 1.I7 <br /> SELECTED PUMP CAPACITY �?y m 3.0 0.98 t,z� <br /> gP a.o i.�s �.a� <br /> 5.0 126 1.65 <br /> B.Determine head requirements: <br /> 1. Elevation difference between um and int of dischar e. aUse 1.0 foot of head for residential systems. <br /> P P � g bUse 20 feet of head for other establishments <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 Pipe Lengeh <br /> � ; <br /> a. Enter friction loss table�vith gpm and pipe diameter. Poinc of Discharge <br /> Read friction loss in feet per 100 feet from table. �.,Z <br /> F.L. = a.� ft./100 ft of pipe Elevation Difference <br /> b. Determine total pipe length from pump to discharge p�,P �.�� <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitdng loss chart. Equivalent pipe F-18b <br /> length-1.25 times pipe length= 1.5 inch 2.0 inch 3.0 inch <br /> 1 oZ D X I.ZJ=�f�f �m Frictim loss pa 100 ft oC Pipe <br /> c. Ca]Culate total friction]oss by multiplying 10 0.69 0.20 <br /> friction loss in ft/100 ft by equivalent pipe length. 12 0.96 0.28 <br /> Total fricHon loss= �•(a x ) 5 c� +lOQ= �/ feet 14 1.28 0.38 <br /> 4. Total hcad required is the sum of elc��a;ion diEf�rcilcc, 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> special head requirements,and total friction loss. 20 2.47 0.73 0.11 <br /> � 25 3.73 1.11 0.16 <br /> + � + =! 30 5.23 1.55 0.23 <br /> �:i (2) (3c? 35 7.9(� 2.06 0.30 <br /> 40 11.07 2.64 ' 039 <br /> 45 14.73 3.28 0.48 <br /> TOTAL HEAD ��feet 50 3.99 O.S8 <br /> 55 4.76 0.70 <br /> 60 5.60 0.82 <br /> C. Pump selection <br />' 1. A pump must be selected to deliver at least�_gpm (Step A) <br /> with at least �s�feet of total head (Step B). <br />