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. . Pi1MP SELECTION PROCEDt�tE <br /> A. Determine pump capacity: <br /> \Gravity Distribution �� PERFORATION OF A PERFORATED LATERAL <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to tay ahead of �-c.a.,c��.. <br /> water use rate. ToP�,,, . <br /> 2, Maximum suggested for delivery to a drop box of a hom system is 2,700 ':.. ...:..... . ,�� _.,. <br /> . . ...������.��loya of CeolntU� FoWk Iw lov• <br /> gallons per hour(45 gpm) to prevent build-up of pressur in drop box. • '�io«nr sa��,». ��„��,.,o��r a u,a..«.�.e <br /> :��wl��red roJn poper) <br /> r or PNlaolton Or11Nd Horl:on�oiiy <br /> Pressure Distribution • • '"'° ` ° "�°` �D <br /> 1 • �/�Ptw �`, AI L�osl 12�lo Edy� <br /> 3. a. Sclect number of perforated laterals , $ o �.id qa ,,. � o� �aw t.ay.r <br /> ���e.�.;-T_�..:. <br /> b. Sclect perforation spacing= ' ft. � ' ' P�rtwollom Luca��d o� <br /> c. Subtract 2 ft. from the rock layer length. ,. c,b�sa,e �,.., eo��om ol Lo�val <br /> ��,-2ft.= (�� ft. ,..: _ ., ...: . <br /> Y�. ��, <br /> ak��o� son Propu�r swr�nw <br /> � B�1«�Plackq Sand loyK <br /> d. Determine thc numbcr of spaces betwcen perforations. <br /> Length perf.spacing= L� f t.+ �; ft._ > -? spaces TAnLE OF PERi+ORATION DISCHARGES IN CPM <br /> e. "� � spaces+ 1 = � ��: perforations/lateral <br /> ' f. Multiply perforations per lateral by number of laterals t �-teaa Perforationdiameter(inches) <br /> get total number of perforations. „ �� ,� <br /> ���. x : �tt,�= '�`�� perforations. �13,� " • <br /> L�' � <br /> 1.Oa OS6 0.74 <br /> g' � x g�+_ :`i gpm• 2 ob o.so i.aa <br /> 2S 0.89 i.17 <br /> SELECTED PUMP CAPACITY ��` m 3.0 0.98 1.28 <br /> -�gP a.o t.ia t.a� <br /> 5.0 1.26 1.65 <br /> B.Determine head requirements: <br /> `1. ElevaHon difference between um and �nt of discha e. aUse lA foot of head for residenHal systems. <br /> p p � � bUse 20 feet of head for othcr establ'uhments <br /> / L � feet . <br /> 2. If pumping to a pressure distribution system,add five f t for pressure <br /> � required at manifold � <br /> � feet <br /> 3. FrieHon loss � Pipe Lengih � <br /> a. Enter fricdon loss table with gpm and pipe diamete . Poinc of Discharge <br /> Read friction loss in feet per 100 feet from table. �a� <br /> F.L.= a.- (o ft./100 ft of pipe Elevaaon Difference <br /> b. Determine total pipe length from pump to discharg pl,n,p 4�� <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitring loss chart. Equivalent pipe F-18b <br /> length-1.25 rimes pipe length= 1.5 inch 2.0 inch 3.0 inch <br /> �.� j x 1.25 = � k' feet gpm Frialon locs per 100 ft ot pipo <br /> c. Calculate total fricHon]oss by multiplying 10 0.69 020 <br /> friction loss in ft/100 ft by equivalent pipe length. 12 0.96 0.28 <br /> Total fricHon loss= �lo x �-�'1 +.]00= feet 14 1.28 0.38 <br /> 4. Total head required is the sum of elevation difference, jg 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 /> �'� + � + � <br /> 35 7.90 2.06 0.30 <br /> (1) (2) (3c) _40 11.07 . 2.64 039 <br /> 45 14.73 3.28 0.48 <br /> TOTAL HEAD �a '� feet 50 3.99 0.58 <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 � feet of total head (Step B). <br /> 1 <br />