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<br /> F-17
<br /> �t;��'' PUMP SELECTTON PROCEDURE
<br /> - EIO PERFORATION OF A PERFORATED LATERAL
<br /> A. Determine pump capacity: �...�..
<br /> Gravity Distribution T,,,,,,
<br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of � ,,�,.N��.�.k���a�
<br /> water use rate. :'`,"„s"'°""' ��""°.`��,">.�,°'`""'°
<br /> �,�,.a,e.r,�,
<br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 . . �+�•��^a��»a��_�^����,
<br /> Inn Wn wor 700
<br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ,�,,;�,,„ ;-.,«,., ,Z•„ E,,.
<br /> ia er n«�un«
<br /> ... . ..._ .�Prlaotbn Lxa1M a1
<br /> Pressure Distibution ����• �"'°'^" �°'•'°'
<br /> 3.a. Select number of perforated laterals 3
<br /> b. Select perforadon spacing=�_feet a+�S^u ►..�+r s�.�ri.a
<br /> BM>�PIedM SoM Larr
<br /> c. Subtract 2 ft from the rock layer length.
<br /> ��� -2 ft._�feet
<br /> d. Deter�mi�e the number of spaces between perforations.
<br /> Length perf.spacing=�ft.+�ft.= 3� spaces Requited Perforabon DLschazge
<br /> e. 3� spaces+1 = ��perforations/lateral �,�uo�p�a,u,�ce�gpm�
<br /> f. Multiply perforadons per lateral by number of laterals to �13a' ��'Se , m�R,, ,
<br /> get total number of perforations. �,-�; x �3 ��_��perforations. H�j �z 4 °�'�`"�
<br /> g. � X�-�,_�BP�. 1.Oa .56 0.74 .
<br /> SELECTE'D PUMP CAPACITY�gpm 2.�b �.8� 1.�4
<br /> B.Determine head requirements: a. Use for single family homes
<br /> 1. Elevarion difference between pump and point of discharge. b.Use for all other applicadons
<br /> �_feet
<br /> � 2. If pumping to a pressure distribution rystem,five feet for pressure
<br /> � � required at manifold if gravity�stem,zero.
<br /> feet
<br /> 3. Friction loss
<br /> a. Enter friction loss table with gpm and pipe diameter. P�Pe L«�B�
<br /> Read friction loss in feet per 100 feet from table. � Poinc of Discharge
<br /> F.L=��ft./100 ft of pipe `�� ��,
<br /> b. Determine total pipe length frOm pump to diSCharge Elevadon Difference
<br /> point. Add 25 percent to pipe length for fitting � -;;;,
<br /> loss,or use a fitting loss chart. Equivalent pipe P
<br /> length-1.25 times pipe length=
<br /> a,a� x 1.25 =�.�feet F-18b
<br /> c. Calculate total friCtion loss b multi 1 n 1.5 inch 2.0 inch 3.0 inch
<br /> Y P Y� S �n FriaSm low pc 100 ft o(pipe
<br /> friction loss in ft/100 ft by equivalent ipe length.
<br /> Total friction loss= �x a 7� +100=��feet 10 0.69 0.20
<br /> 12 0.96 0.28
<br /> 4. Total head required is the sum of elevation difference, 14 1.28 0.38
<br /> special head requirements,and total friction loss. 16 1.63 0.48
<br /> 18 2.03 0.60
<br /> 20 2.47 0.73 0.11
<br /> _�+ �� +�_ 25 3.73 1.11 0.16
<br /> (1) (2) (3c) 30 5.23 1.55 0.23
<br /> 35 7.90 2.06 0.30
<br /> TOTAL HEAD � 40 11.07 2.64 039
<br /> �_feet 45 14.73 3.28 0.48
<br /> 50 3.99 0.58
<br /> C. Pump selection 55 - 4.76__ 0.70
<br /> 60 5.60 0.82
<br /> '�'��, 1. A pump must be selected to deliver at least
<br /> ��gpm (Step A) with at least �� feet of total head (Step B).
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