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t -. <br /> ' � P�ZESSURE DISTRIBUTIOIV SYSTEM <br /> 1. Select number of perforated laterals � <br /> 2. Select perforation spacing = � ft. <br /> 3. Since perforations si�ould not be placed closer than 1 ft. to <br /> the edge of the rock layer (see g. E-14), subtract 2 ft. from the <br /> rock layer length. <br /> � Z - 2ft. = �odit. <br /> Rnck laycr lenRth <br /> 4. Determine the number of spaces between perforations. <br /> Divide the length above by perforation spacing and round E-17a <br /> down to nearest whole number. <br /> TAB OFPERFORAT[ON tSCHARCESItiG�".' <br /> Head Perforado�ciiacnete:(mches) <br /> Length perf. spacing =�v4 ft. = 3 ft. _ �Q spaces 13z �!a <br /> �3) �?) 1.Oa 0.56 0.7� <br /> 1.5 0.69 0.90 <br /> 5. Number of perEorations is equal to one plus the number of 2.ob °.�" l.a� <br /> 2.5 0 F9 1.17 <br /> perforation spaces . 3.0 o.ya i.=s <br /> 4.0 1.13 1.4i <br /> 20 s aces + 1 = Z/ s.o 1.26 1.65 <br /> p pe:forarions/lateral aUse 1.Ofoot of head fo�residential systems. <br /> bUse 2.0 feet of head Eor other establishments <br /> 6. Multiply perforations per latera:by number of laterals to <br /> get total number of perforations. E-17b <br /> � G/ ' . ►W�e�Jlw�r�ar M qu�v s!IMaer:s�lue�l y <br /> {u�mr<t 0�QsO�{�r�p1ym <br /> x = �o erforations. ��� <br /> larerals prds�arerat p ""�'""°' 1.25 inch 1. inch � 2.0 ir,_n <br /> 2.5 14 18 2�3 <br /> 7. Deter.nine required flo�rr ra*e by cnultiplying 3;3 tz i6 � z <br /> number of perforations by flow per perforation a.o ti ts � �� <br /> (see page E-17) s.o io ia l 2, <br /> SA� � ^ <br /> �rs X ,�:���-� ������ �:_�5 <br /> ...�,a,�.�.,��..�„��,,.,.,.b,a� <br /> -,� <br /> 8. If laterals are connected to heade:pipe as shown on page E- <br /> � <br /> 15, select minimum required lateral diameter from table on � �,��:.,- <br /> page E-17;enter table with perfc�rati�n spacing ar.d number �'" ,,.•�''' iv- ( <br /> of perforarions per lateral. Sele�:;ninimum diameter for �'�� <br /> perforated lateral = inches. <br /> F,-12 <br /> ,--�.�.:.�_;��- <br /> � 9. If perforated latPra: ;ti-stem is attached to manifold pipe near �'��'s_„.�r. <br /> the cent�r, a�: on page E-12, perforated lateral length and "`' � <br /> numb�r of perforations per lateral will be approximately one ��"'�� � <br /> ...�� <br /> half oE that in step 8. Using thesQ values, select mini _.. . ,,,r <br /> diameter for perfurated lateral from page E-17 as �� �.�•'� '- <br /> inches. <br />