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<br /> PRESSUfE DISTRIMITION SYS' PERFORATION OR A Fo�.arm•u- ,,L.
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<br /> 1. Select number of perforated laterals_ - 3 t r.,.wl , :
<br /> leer Si ti.e.w,e. /tarty for,y
<br /> 2. Select perforation spacing = feet. -' . `'m"'s"'e `"" I ' l�„",w p,;,,,;�-«•-�
<br /> il'dr.'.Z.r■.n'numni ;� Pirtle, rw. On,l.e Nr„r„a,e
<br /> 44. cop Neat e,1.
<br /> 3. Since perforations should not be placed closer than 1 ft. to ►+}1 A .r l...r ,_•,. �.
<br /> the edge of the rock layer(see diagram), subtract 2 ft. from . "
<br /> the rock layer length. . -... s..., ,..�, �':".el L4 0471 •t
<br /> ,`) Jam- 2 f t. m J< -3 felt.
<br /> Rack Layer la,6rl, , s.+«.►taws sw s4r, q
<br /> TABLE OF PERFORATION DISCHARGES IN GPM
<br /> 4. Determine the number of spaces between perforations. Head Perforation diameter(Inches)
<br /> Divide the length above by perfcr:icn ;,pacing and round
<br /> down to nearest whole number. 7. I ''•
<br /> ids, 00-56
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<br /> Length perf. spacing = S`3 ft.+ -.3 ft. _ l - spaces 1.0
<br /> 20b 0.80
<br /> (3) (2) 2.5 0.89 1.17
<br /> 3.0 5. Number of perforations is equal to one plus the number of 4.0 13 1.47
<br /> perforation spaces . 5.0 1-26 163
<br /> 1 / I aI.:ae 1.0 foot of head for residential systems. y
<br /> I 7 spaces + 1 = QUbuss 2.o feet of head for other establitftm.;,-
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<br /> perforations/lateral
<br /> 6. Multiply perforations per lateral by number of laterals to ,,,...7
<br /> get total number of pe forations.
<br /> "' 1.25 inch is inch 2.0 inch
<br /> 2-S 14 18 28
<br /> ICC, 13 �TT> 26
<br /> 3.3 12 16 2.5
<br /> latent s x p /!acts:►n Perforations. 4.0
<br /> 11 15 23
<br /> 5.0 10 14 22
<br /> 7. Determine required flow rate by multiplying
<br /> number of perforations by flow per perforation
<br /> X0,7 9 ,gpm.
<br /> rtrfs �at /tlt teUrt7 al' M r. , 00r00,10. n �
<br /> Peri
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<br /> 8. If laterals are connected to header pipe as shown on upper .
<br /> example, to select minimum required lateral diameter; enter �-1"
<br /> table with perforation spacing and number of perforations ,�, tau
<br /> per lateral. Select minimum diameter for \ ''
<br /> perforated lateral =_____ inches.
<br /> 6.14....-M.:4491 t...,AM
<br /> .......•9. If perforated lateral system is attached to manifold pipe near '- '"� .
<br /> the center, lower diagram, perforated lateral length and ,-=:"..---
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<br /> number of perforations per lateral will be approximately one w •srgtrdrem
<br /> half of that in step 8. Using these values, select minimum .,..,�
<br /> diameter for perforated lateral = / hz, inches. \--"-- G,5 -==-
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