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, - : . . ; F-17
<br /> ptP�rP SEr_.F(�`rtc��1 PROCEDURE
<br /> END PEf7fOR.4TlON CF A PERFORATED L�TEn/+�
<br /> A Determine pump capadty: ���•�
<br /> Gravity Distribution ��.«� '
<br /> ]. Minimum suga sted is 600 gallons per hour(]0 gpm)to stay ahead of - �• �,o,�,,,,,,��,,,�,,,,,,-
<br /> water use rate. `.�„'sa''`".� �""'�°'�°��°"w a`�...a
<br /> .�,��,o..,�..,'
<br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 ,. . �^TM�°��a+���° ��:°^�°",
<br /> Inte(Ap H�er 7eD
<br /> gallons per hour(45 gpm)to pre��ent build-up of pressure in drop box. �,,•,,,„ -„ ��.� �2•�e�ao.
<br /> s�Dro Flela ol R«a:rf.r
<br /> . . . � f'rlrorleti LotatM a1
<br /> Pressure Distibution � �'�°^�'°�°� �"'""«`°"�°�
<br /> 3.a. Select number of perforated laterals ?
<br /> b. Select perforation spacing=�_feet. /e�.e.Pw'�vsom Ce;.�."�
<br /> c. Su�act 2 ft from the rock layer length.
<br /> ����-2ft= Ld feet
<br /> d. Deternune the number of spaces between perforations.
<br /> Length perf.spacing= (��ft.+z ft._�2 SpaceS Required Perforation L)i5charge
<br /> e. �-�S�CeS+1 = 0�2� pflfOldtioILS/Idteldl �� in gallons per minute ,
<br /> f. Multipiy perforations per lateral by number of laterals to �)� DH�e � m��,, � P��
<br /> �total number of perforations.-�- x-�=j�Q,,_�_perforations. (feet) 3z °
<br /> �.��. �,s \
<br /> g- ' _�gP --
<br /> X�,�+ �• �._._ . , ��,� 1.Oa �-O.�b=�' "�74
<br /> SELECTED PUMP CAPACITY ' 3 � 'gpm ,� 2.0�j 0.80 1.U4
<br /> �
<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 sZ:stem,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. Pipe Lengch
<br /> Read friction loss in feet per 100 feet from table. � Point of Ducharge
<br /> F.L= �. lo f�/100 ft of pipe ��`t�
<br /> b. Determine total pipe length from pump to discharge Elevation Difference
<br /> point. Add 25 percent to pipe length for fitting p�,p _9 g�,v
<br /> loss,or use a fitting loss chart. Equivalent pipe
<br /> length-1.25 times pipe length= F-18b
<br /> �6 D x 1.25 = /00 feet
<br /> 1.S inch 2.0 inch 3.0 inch
<br /> c. Calculate total friction loss by multiplying � �;a;«,i���oort�c�;�
<br /> friction loss in ft/100 h by equivalent pipe length. 10 0.69 0.20
<br /> Total friction loss= �.� x��-100=�_feet 12 0.96 0.28
<br /> 4. Total head required is the sum of elevation difference, 1� 1.28 038
<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 /> TO?AL HEAD 3 40 11.07 2.64 039
<br /> �_feet �5 14.73 3.28 0.48
<br /> SO 3.99 0.58
<br /> j5 4.76 0.70
<br /> C. Pump selection 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).
<br />
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