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PUMP SELECTION PROCEDURE <br /> A. Determine pump capacity: <br /> � Gravity Distribution F19D PERFORATION OF A PERFORATED LATERAL <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of �,,,.�,,,„ <br /> water use rate. T��� � <br /> 2. Maximum suggested for delivery to a drop box of a nome system is 2,700 ._; <br /> �Y�LayK of GeoN�til�Fodk(a far- <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. `�oamY sa�e �,�, - ,,,�,,,,,<,,,,�y„,,,o,.�,., <br /> . �,h.� ����,�.� <br /> �'er or • e o � �olbn Drllkd 1lwliontally <br /> Pressure Distribution ' '' ' ' ' '^'° o "�°� �o <br /> 3. a. Select number ofpp rforated laterals 3 `'%%�, , ^' �°°" 1z•'° Eda' <br /> C- a�Dra_,T�FNId Ra ti- � ol RocY Loyer <br /> b. Select perforation spacing= ? ft. ` - ° ' <br /> � P„Iwolluns Localed ot <br /> c. Subtract 2 ft. from the rock layer length. ' c'�^��� �°"°'"°' `'°'•`°' <br /> �1,-2 ft._ !cG� ft. . <br /> Yer ^g+ <br /> Orlpinol Soll P�opaly StorillW <br /> B�Iw�Plockp Sond Layer <br /> d. Determine thc number of spaces between perforations. <br /> Length perf.spacing= ��o ft.+ ' ft._ ��'�� SPaCCs TABLE OF PERFORATION DISCHARCFS 1N CPM <br /> e. ��� spaces+ 1 = �� perforations/lateral <br /> ' f. Multiply perforations per lateral by numbcr of latcrals to Hcad Pcrforationdiameter(inches) <br /> get total number of perforations. ,� ,� <br /> �-� x �� ����_ �9 perforations. " ' <br /> ].Oa 056 0.74 <br /> ]S 0.69 0.90 <br /> g' � X 6P�-�_gPm• 2.ot� o.so �.oa <br /> 2S 0.89 1.17 <br /> 3.0 0.98 1.28 <br /> SELECTED PUMP CAPACITY�gpm q.0 �.13 t.47 <br /> 5.0 1.26 1.65 <br /> B.Determine head requirements: <br /> aUse 1.0 foot of head for residential systems. <br /> 1. Elevation differencebetween pumpand point of disch��rs�. bUse2Afeetofheadforotherestablishments <br /> �_feet <br /> 2. If pumping to a pressure distribution system,add five feet for pressure <br /> required at manifold <br /> 5 feet <br /> 3. Frietion loss Pipe Lengch <br /> a. Enter friction loss table with gpm and pipe diameter. � Poin�of Discharge <br /> Read friction loss in feet per 100 feet from table. l �`'by p <br /> F.L. = a• c, ft./100 ft of pipe Elevation Diffcrcncc <br /> b. Determine total pipe length from pump to discharge Pump �t'15,J <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitting loss chart. Equivalei�t pipe F-18b <br /> length-1.25 times pipe length = 1.5 inch 2.0 inch 3.0 inch <br /> � �l� X I.ZJ = ��� fC'Cf �,P�p Friaion loss pv 100 ft o(pipe <br /> c. Calculate total friction loss by multiplyiT,g l0 0.69 0.20 <br /> friction loss in ft/100 ft by equivalent pipe]ength. 12 0.96 0.28 <br /> Total friction loss= �J , lo x ;',G O �-]00 = � feet 14 �.?3 0.38 <br /> 4. Total head required is ihe sum oE c;c��a;ion diffcrcncc, 16 1.63 O.s� <br /> l8 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 /> �-;� + � + �1 30 5.23 1.55 0.23 <br /> �1� �2� ���� 35 7.90 2.Q6 0.30 <br /> 40 11.07 2.64 0.39 <br /> 45 14.73 3.28 0.48 <br /> TOTAL HEAD - - 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 />