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` ' F-17
<br /> Pi]MP SELECTION PROCEDURE
<br /> FJID PERfORAT10N OF A PERFORATED L4TERAL
<br /> A. Determine pump capacity: w-�
<br /> Gravity Distribution T.,.«, �'�''���
<br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of .>:: �� - � `^ ,,�„N„w�,b,k,,,,,,,.
<br /> water use rate. ���"""S°"'`°"' .����,,;..;,°'`""'°
<br /> 2. Maximum suggesbed for delivery to a drop box of a home system is 2,700 , »�,������_^^�°'�r
<br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ,�;,N„ ;-u�a.� �r�o eaae
<br /> .�n«.�or.,
<br /> ..• . . .... � PMMOIIMI�IICOtM o1
<br /> Pressure Distibution �,..,,s.,,,,,,� ���M U1�nl
<br /> 3.a. Select number of perforabed laterals�
<br /> b. Select perforadon spacing=�_feet �.�;,.'s�;"',.,�"'"°
<br /> c. Subtract 2 f�from the rock layer length.
<br /> �� -2 ft._�_feet
<br /> d. Det rnune the number of spaces between perforations.
<br /> Length perf.spacing=�ft.+�ft._�_spaces Reyvired Pesforation Disch e
<br /> e. 3�spaces+1=��perforations/lateral �+s�o�p�r a'i"°te�SP*'�
<br /> f. Multiply perforadons per lateral by number of laterals to ��3��,� '�H�d8e �z ma� � q��
<br /> get total number of perforadons. �,� x �,,, ,Q,,__�perforations. �f�t>
<br /> g' s9�* X�'�+'�BPm.
<br /> 1.Oa 0.56 0.74
<br /> SELECT'ED PUMP CAPACTTY��gpm 2.�b �.g� 1.�4
<br /> B.Determine head requirements: a.Use for single family homes
<br /> 1. Elevation difference between pump and point of discharge. b.Use for all other applications
<br /> !�. feet
<br /> 2. If pumping to a pressure distribution system,five feet for pressure
<br /> required at manifold if gravity system,zero.
<br /> �feet
<br /> 3. Friction loss
<br /> a. Enter friction loss table with gpm and pipe diameter. RP�I-a►B�
<br /> Read friction loss in feet per 100 feet from table. Poinc of Dischazge
<br /> F.L._ �, l. f�/100 ft of pipe T�g�.
<br /> b. Deternvne total pipe length from pump to discharge F,levation Differsncel
<br /> point. Add 25 peraent to pipe length for fitting p�„p -�y
<br /> loss,or use a fitting loss chart. Equivalent pipe
<br /> length-1.25 times pipe length= F-18b
<br /> 7�}D x1.25= 300 feet
<br /> c. Calculate total friction loss by multiplying 1.5 inch 2.0 inch 3.0 inch
<br /> g� friuim lass pa I00 R of pipe
<br /> friction loss in k/100 ft by equivalent pipe length.
<br /> Total friction loss= �.1. x 3 o a +100= � feet 10 0.69 0.20
<br /> 12 0.96 0.28
<br /> 4. Total h�d required is the sum of elevation difference, l4 1.28 0.38
<br /> special head requirements,and total friction loss. 16 1.63 O.a8
<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 0.39
<br /> �.�feet 45 14.73 3.28 0.48
<br /> 50 3.99 0.58
<br /> 55 4.76 0.70
<br /> C. Pump selection bo s.6o o.az
<br /> 1. A pump must be selected to deliver at least
<br /> s�_gpm (Step A) with at least ��,�feet of total head (Step B).
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