Laserfiche WebLink
PIJMP SELECTION PROCEDURE ' ` <br /> A. Determine pump capacity: <br /> CGravity Distribution EMO PERFORATION OF A PERFORATED LATERAL <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm) to stay ahead of �„„�,,,,, <br /> water use rate. <br /> ToDwll <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 <br /> gallons r hour(45 m)to revent build-u of ressure in dro bOX. `� � ��� `Loye�of Geoi��til� FaOrk(a far• <br /> Pe 8P P P P P � � .'�,���.��yaN,�.�..a <br /> �� wth red rosin poper) <br /> er or e e a Perlwotion prllled Horizon�olly <br /> Pressure Distribution • �,�o , ►�a� wp <br /> 3. a. Select number of perforated laterals � '��:��. � a ���.� �r�o Eaa� <br /> b. Select�p rforaHon snacin - � ft. �� F~�a a« �.:•' o� r�k►�y« <br /> r� r g '- � "� � � � P�rfvollwis�lowled ot <br /> c. Subtract 2 ft.from the rock layer length. c�w�s«��w. �°"°^�°' �a�•��, <br /> ���-2ft.=�ft. <br /> am�oo� son vrop..�y swr�nw <br /> BNon Plocinq Serd Loyer <br /> d. Determine thc number of spaces between perforations. <br /> Length perf. spacing=1�ft.+ ? ft._� � spaces TABLE OF PERFpRA7'fON DISCHARGES IN GPM <br /> e. ��spaces+ 1 =�_perforations/lateral <br /> ' f. Multiply perforations per lateral by number of laterals to Head Perforationdiameter(inches) <br /> get total number of perforations. <br /> -� ,, �� ,� <br /> x � - � rforations.�l���_ ���,. " • <br /> lL enr/ t lMI-y-� <br /> 1.L � 0.74 <br /> g' �. X awn��_�gpm• �s 0.69 0.90 <br /> 2.ob o.so �.aa <br /> 2S 0.89 1.17 <br /> SELECTED PUMP CAPACITY m 3.0 0.98 1.28 <br /> -�-gP a.o �as �.a� <br /> S.0 1.26 I.65 <br /> B.Determine head requirements: <br /> 1. Elevation difference between um and int of dischar e. aUse lA foot of head for residential systems. <br /> p � � bL'se 2A 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. FriCtiOn loss Pipe Lengch <br /> � �. <br /> a. Enter friction loss table with gpm and pipe diameter. Poinc of Uischarbe <br /> Read friction loss in feet per 100 feet from table. ��� <br /> F.L. = a•e� ft./100 ft of pipe Elevation Difference <br /> b. Determine total pipe length from pump to discharge �,p ��� <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitting loss chart. Equivale��t p;pe F-18b <br /> length-1.25 Hmes pipe length= <br /> / 1.5 inch 2.0 inch 3.0 inch <br /> ._{._�_x 1.25 =_! �k�-1 feet spm Fria;on 1ou per 100 fr oF pi�,e <br /> c. Calculate total friction loss by multiplying 10 0.69 0.20 <br /> friction loss in ft/100 ft by equivalent pipe length. 12 09G Q28 <br /> Total friction]oss= ��_x �,�; =1U0 =_�feet 14 1.28 0.38 <br /> ��. �o;a1 hec�'. re�uir�d is !he suin of eicvati�_�n di;fCrcr.c�, l6 1.63 0.48 I <br /> 18 2.03 0.60 <br /> special head requirements,and total frictio�l loss. 20 2.47 0.73 0.11 <br /> 25 3.73 1.11 0.16 <br /> �_ + ,5� +�__ 30 5.23 1.55 0.23 <br /> '�5 7.90 2.06 0.30 <br /> �1� �2� �3�� 4v 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 OJO <br /> 60 5.60 0.82 <br /> C. Pump selection <br /> 1. A ��,mp must be selected to deliver at least :�'�; gpm (Step A) <br /> �ti�ith at least i =' feet of total head (Step B). <br />