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pi MP SELE�TION PROCEDILRG <br /> A. Determine pump capacity: <br /> END PERFORATION OF A PERfORATED LATERAL <br /> Gravity Distribution ��,,..co�.. <br /> 1, Minimum su�ested is 600 gallons per hour(10 gpm)tc�stay ahcad of ��� `--� ` <br /> water use rate. T°0`°'� _ <br /> 2. Maximum suggested for dclivery to a drop box of a home system is 2,7(x) �: . --_-- • ����,«or��,�.r,;,�F,a,�ia,,�,- <br /> �'� wilh red rosin poperl <br /> gallons per hour(45 gpm)to prevent build-up of pressurc in drop box• �oamY S°nd�°Nar incA lapr ol FaY a aV°"'c°•end <br /> ' �y`�-�-� -Perlaotion d11Nd Na��u��ally <br /> r er wg,� °J�4^4-- Inlo D �or Top <br /> �F �.,r:.�,.'. <br /> �C � ��-'�-A1 lwsi 12�io EJye <br /> Pressure Distribution ��:P��, ,�� o, ,:ak�,y., <br /> 4Qrom flald.Rock_•;1� � .. ..,�;i <br /> 3. a. Select numbcr oE perforatcd laterals ft _.P���wo�����_��uled o� <br /> b, Select perforation spacing= c,.a�Said WWr Bouom el Lotval <br /> c. Subtract 2 ft.from thc rock laycr length. <br /> ,� y�. �� -2 ft.= ft. °e�i�°�N«°�v s��io��rw <br /> d, Determine thc numbcr of spaces betwcen perforations. <br /> Length perf.spacing= ft.+ ft.= spaccs TADI.F.OP PERPORAT(ON UISCi IARCrS IN CI'M <br /> �, spaces+1 = perforations/lateral <br /> Hcad Pcrforation diameter(inches) <br /> ' f. MulNply perforations per lateral by number of laterals to - <br /> � '/ <br /> get total number of perforations. �» � _ <br /> X - perforations. �� 0.56 _ o.�a <br /> teo s pe e teral <br /> l.5 0.69 �•� <br /> g. �, x g�,,, �= gPm• 2.sb o.s9 t.t� <br /> 3.0 0.98 1.28 <br /> SELECTED PUMP CAPACITY �� gPm 5 0 �26 t.65 <br /> B.Determine head requirements: aUse 1.0 foot of hcad for residential systems. <br /> 1. Elevation difference between UTT1p atld j�0111t Of a1SCIl3i�e. bUse 2A feet of head for othcr esWblishments <br /> feet <br /> 2. If pumping to a pressure distribution systcm,add five feet for pressure <br /> required at manifold <br /> �_feet p;��ng�h <br /> 3, FriCtiOn loss r .97� Point of Discharge <br /> a. Enter fricNon loss table with gpm and pipe diamcter. <br /> Read friction loss in feet per lOQ fect from tablc. Ele�a�ion D'►[ference 8 <br /> F.L._ ��ft./100 ft of pipe <br /> b. Determine total pipe length from pump to discharge � Pump <br /> point. Add 25 percent to pipc length for fitting <br /> loss,or use a fitNng loss chart. Equivalent pipe F-isb <br /> length-1.25 rimes pipe length= Q 1.5 inch 2.0 inch 3.0 inch <br /> �_X 1.ZrJ= •3 v f CCt sP�p Priction loas[K:r 100 R ot pipe <br /> c. Calculate total friction loss by multiplying �o 0.69 0.20 <br /> friction loss in ft/100 ft by equivalent pipr length. feet t4 i.28 0 38 <br /> Total friction loss= �X-�-}��x�-'�- 16 1.63 0.48 <br /> 4. Total head required is the sum o f e levation di f feren c c, l g 2.0 3 0.6 0 <br /> 2p 2.47 0.73 0.11 <br /> special head requirements,and total friction lass. 2g 3.73 1.11 0.16 <br /> 8 30 5.23 1.55 0.23 <br /> + S + �' 35 7.90 2•06 030 <br /> (1) (2) (3c) 40 11.07 2.64 0.39 <br /> 45 14.73 3.28 0.48 <br /> � feet 50 3.99 0.58 <br /> TOTAL HEAD 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 20 gpm (Step A) <br /> with at least/� feet of total head (Step B)• <br /> � <br /> � <br />