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Pi1MP SELECTION PROCEDURE <br /> A. Determine pump capacity: <br /> Gravity Distribution END PERFORATION OF A PERFORATED LATERAL <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of �-c.o..co�.. <br /> water use rate. rop�,,, � <br /> 2. Maximum svggested for delivery to a drop box of a home system is 2,700 ' -- <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. -. �,,,,,.s„�,� ��arH o�c«�.r�;,. Foa�<<a}�- <br /> Y ytr -:kr.l�layer ol My a uron cwr�d <br /> u _ :��with red rotin poper) <br /> � S�i,- - � 3 1 1 -l`-� •~�-�o o�a PMlo�otioo Drllled Horiiontolly <br /> Pressure Distribution /% 5a.' _ �J ,� ._ �y �•. • • • • • ���o G p Nco� Top <br /> 3. a. Select number of rforated laterals .� `i a' _ + i'�:%�. ,`, a ��af� �z•�o Edpt <br /> � - I D � = I I '��a1n Fl�ld RocN•• ,.�- • of Rock lnycr <br /> b. Select perforation spacing= L-1 ft. ' � _ � .._ � _ � Pntwotivns Low�rd ol <br /> c. Subtract 2 ft.from the rock layer length. = � - qwn$ond Loy�r Bonom o! Laivol <br /> � � <br /> �� ��, -2ft.= - ft. Ir1 : y � =5 . <br /> Orlpina Soll Propaly Scailled <br /> Bdon Plockp Sond Loyer <br /> d. Determine the number of spaces between perforations. v,,5`� <br /> Length perf.Sp8CiT1g= --- f t.+ f t.= SpaCeS TAIILE OF PERFORATION DISCHARGES IN GPM <br /> e. -- spaces+ 1 = - perforations/lateral <br /> ' f. Multiply perforadons per lateral by number oE laterals to Head Perforation diameter(inches) <br /> get total number of perforations. �� ,� <br /> �� x 6 t�,i=�perforations. p � <br /> 1.Oa OS6 0.74 <br /> g' � X a�vn+-�gPm• z.�ob o.so i.o�a <br /> 2S 0.89 1.17 <br /> SELECTED PUMP CAPACITY�� m 3.0 0.98 1.28 <br /> gP a.o �aa �.a� <br /> 5.0 1.26 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 residenrial systems. <br /> p p � g bUse 2A feet of head for other establishments <br /> � 2. 1 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 ; P'�L�"g�' � <br /> a. Enter fricdon loss table with gpm and pipe diameter. Poinc of D;scharge <br /> Read friction loss in feet per 100 feet from table. 9`� <br /> F.L._ � , n ft./100 ft of pipe Elevation Difference <br /> b. Determine total pipe length from pump to discharge pump �' c� <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitting loss chart. Equivalent pipe F-18b <br /> length-1.25 times p�length= 1.5 inch 2.0 inch 3.0 inch <br /> 1 y � x 1.25 = I � ) feet gpm Frictian loss per 100 ft of pipe <br /> c. Calculate total fricdon loss by multiplying l0 0.69 020 <br /> friction loss in ft/100 ft by equivalent pipe length. 12 0.96 0.28 <br /> Total fricdon loss= 3, C� x I 4� 1 +.100=_�_feet 14 1.28 0.38 <br /> 4. Total head required is the sum of elevation difference, ig 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 /> oZ ) +�_+ S� 30 5.23 1.55 0.23 <br /> 35 7.90 2.06 0.30 <br /> (1) (2) (3c) _40_ 11. 7 .64,_,__ 039 <br /> ' 45 14.73 3.28 0.48 <br /> TOTAL HEAD �.L_feet 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> 60 5.60 0.82 <br /> C. Pump selection <br /> -�. A pump must be selected to deliver at least�gpm (Step A) <br /> with at least�_feet of total head (Step B). <br /> . <br />