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PUMP SEL.ECTION PROCEDLm_F <br /> A. Determine pump capacity: <br /> C, Gravity Distribution EN� PERFORATION OF A PERFORATED LATERAL <br /> 1. Minimum suggest�ed 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 home system is 2,700 <br /> �.;.,;ti,..>:,.,. <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ::y�%��,�,,,,sa,w,a,,.. �`�',�',',y;,;;°',„,`,"«�;�;�' <br /> +�:;,��.:. :�wim rca rosln pape.) <br /> H PNlwclbn Orlll�d HorlSon1011y <br /> Pressure Distribution • r��o , �.a� �, <br /> 3. a. Select number of perforated laterals 3 '�:r+w , , N �� �z•�o �. <br /> oi FMI Rocl . .'. ol Roc►Lrya <br /> b. Select perforation spacing=_�ft. .- � ` 'P«i«��;:'��w a� <br /> c. Subtra 2 ft.from the rock layer length. `'` c��s� �y« �^"°^�°' ��•�a� <br /> ����-2 ft._��ft. - <br /> o�whwi son P.�nr swruNa <br /> BHon PlorMq Sond�oya <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing=�L ft.+�ft._�spaces TABLE OF PERFORATION DISCHARCES IN GPM <br /> e. �spaces+ 1 =�_perforaHons/lateral <br /> ' f. Multiply perforations per lateral by number of laterals to Head Perforation diameter(inches) <br /> get total number of perforations. <br /> ��� ,�� <br /> �� x �=y�perforations. <br /> �/ 1.Oa OS6 0.74 <br /> g' � X ,`�(� _,�g�m• ]S 0.69 0.90 <br /> P� 6�e�+� 2.Ob 0.80 1.(14 <br /> 2S 0.89 1.17 <br /> SELECTED PLJMP CAPACITY '�c, m 3.0 0.98 t.2s <br /> -�-gp 4.0 1.73 ].47 <br /> 5.0 126 lb5 <br /> B.Determine head requirements: <br /> 1. ElevaHon difference between 11IT1 and �i�t of dischar e. aUse 1.0 foot of head for residential systems. <br /> � P 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. Frietion loss Pipe[.ength <br /> � <br /> a. Enter friction loss table with gpm and pipe diameter. � Poinc of D;scharge <br /> Read friction loss in feet per 100 feet from table. �� � <br /> F.L._ �. l.. ft./100 ft of pipe Elevation DiCfcrence <br /> b. Determine total pipe length from pump to discharge p�,p �oj z <br /> point. Add 25 percent to pipe length for fitting <br /> ]oss,or use a fitting loss chart. Equivaleilt pipe F-18b <br /> length-1.25 times pipe length = 1.5 inch 2.0 inch 3.0 inch <br /> �X 1.�J = f ► Z fC'�t gPm Friaion los+per 100 ft o( � <br /> P fw <br /> c. Calculate total friction loss by multiplying 10 0.69 0.20 <br /> friction loss in ft/100 ft by equivalent pipe lccigth. 12 0.96 0.28 <br /> Total friction loss= a, �- x ! )"Z- +100=�_feet 14 1.28 0.38 <br /> 4. Total head required is the sum of elc��ation diffcrence, 16 1.63 0.48 <br /> special head requirements,and total friction loss. 18 2.03 0.60 <br /> 20 2.47 0.73 0.11 <br /> 25 3.73 1.11 0.16 <br /> �_+�_+�_ 30 5.23 1.55 0.23 <br /> (1) (Zi (3cl 35 7.90 2.06 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 /> � l. A pump must be selected to deliver at least�� gpm (Step A) <br /> with at least��feet of total head (Step B). <br />