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� � . <br /> , . <br /> U <br /> � •• � <br /> n � p '� • <br /> PRESSURE DISTRIBUTIOIV SYSTEM <br /> 1. Select number of perforated laterals �v <br /> 2. Select perforation spacing = 3 ft. <br /> 3. Since perforations siloul��rnot be placed closer tha 1 ft. to <br /> the edge of the rock layer (see p. F-14), subtract 2 f . from the <br /> rock layer length. <br /> ; <br /> (�, ,.__. t f t <br /> Ra k laycr lenRth - 2 1 t. — (�i t. <br /> 4. Determine the number of spaces between perforat'ons. <br /> Divide the length above by perforation spacing an round E-17a <br /> do�vn to nearest �hole number. fj TABLEOFPERFORATION DfSCHARGESf�lCf".' <br /> Head Perforation ciiune!e:hnctes) <br /> Length perf. spacing =�e�> ft. �'= � ft. _ •��s aces �i32 '!a <br /> �3) C�� 1.Oa 0.�6 0.;� <br /> 1.5 0.69 0.90 <br /> 5. Number of perforations is equal to,q'ne plus the n mber of Z.ob a.�� i.oa <br /> zs o�� �.�; <br /> perforation spaces . 3.o G.v3 t_9 <br /> 4.0 1.13 1.4i <br /> 5.0 1.26 1.5� <br /> r'�'; spaces + 1 = �.'_ � perforarions/lateral aUse 1.0 foot of head for residential sysrems <br /> bUse 2A feet of head Ior other establis�ments <br /> 6. Multiply perforations per lateral by number oE lat rals to <br /> _� get total number of perforations. E-17b <br /> .__, --. / <br /> .....__.u..�w.s�ae�.a� �..1e m�e our.,�..s,,Q�,..e.:�e <br /> �' ,G. i ; /n r�.,v�<�os�e.�..�.,m <br /> la�erals X perts�:aterat— �� � I'erFnrat101iS. ��r'p'OO� 1.25 inch 1.5 incr. � 2.0 ir_r: <br /> 2.5 14 18 � 28 <br /> 7. De�e�ine require� flcr: rate by :nultiplyi g 3.3 iz i6 � �s <br /> number of perforations by flow per perforation a.o i� ts � z� <br /> (see page E -lii ; s.o io ia f r_ <br /> //` ,1 f� ��/ r,r�-�f:� <br /> perfs X �+r:/,c••rf �—j��' :h[' � �i �.._1 � <br /> Wr,OI]lL[�'ID�i PO�J'�[]1K O'f�1i�Rqw ri•�r � <br /> 8. If laterals are connected to header pipe as shown n page E- � <br /> �y l <br /> 15, select minimum required lateral diameter fro table on � �`;,._��• � <br /> page E-17; enter table with perforarinn spacing ar. number �_.�r,�•-� d��J' <br /> of perforations per lat��al. Seleci �ninimum diam ter for �,j <br /> perforated lateral = r :�� inche�. <br /> ' F.-12 <br /> ,..,.. <br /> �?. if perfc�r���ed later�: ;ystem is attached to manifol pipe near �„�„�,,:__. �r- <br /> the center, a�, on page E-12, perforated lateral len h and �``^� -� <br /> num`�er oE ��erforat�ons per lateral will be approxi ately one �'��'� <br /> ` "�'AL•� <br /> halE oE that ir� step 8. Using these values, select m nimum _� . ,_ <br /> diameter for �erf��rated lateral from page E-17 as �..�''` —'�— <br /> inches. <br />