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, PRESSURE DISTRIBLTTION YSTEM �D PERFORATION OF A PERFORATED LATERAL <br /> Graa Cova <br /> • 1. Select number of perforated laterals � Topwll Y,,, <br /> .. _ . ,., <br /> ' ...- '�. r ..tayer of fiwte:tU� FaWlc (a Iw <br /> �� �Loamy SaM LnYK 'MeA Iqw of hay or Mro.cwned <br /> 2. Select perforation spacing= � feet. ..� �M�,h� ��,�,�,�*, <br /> `er. P.r�a�bn oruiea.Hauonwur <br /> � IMo Gap N�ot Top <br /> 3. Since perforations should not be placed closer than 1 ft. to �J'%P��� -��: At Leasl �2•,o EdQa <br /> Droln Fltid Rocl . ,_.� of Rxk Lnyer <br /> the edge of the rock layer(see diagram), subtract 2 ft. from �' ��a�a��a,.���,�d „ <br /> the rock layer length. � <br /> Clean Sand Loyp Bottom of Laterol <br /> � Orlpinal Soll Propaly Swrilied <br /> � -1 ft. = c�.� feet. Belae Plodnp Sond Lay�r <br /> R«k layer lergth <br /> 4. Determine the number of spaces between perforations. ��N�m�u�m,� <br /> Divide the length above by perforation spacing and round o�,�.� <br /> down to nearest whole number. "u� �'"~ �"" <br /> 1.Oa 0.56 0.74 <br /> Length perf. spacing =�ft. -�-� ft. = c spaces 2.Ob 0.80 1.04 <br /> (3) (2) T <br /> a.Use for single family twmes <br /> 5. Number of perforations is equal to one plus the number of b.Use for all other applicaHons <br /> perforation spaces . <br /> Maximum number of quarter inch perforations pe <br /> spaces + 1 = �C�perforations/lateral lateral to guarnantee<10%discharge variaHon <br /> Perforation <br /> 6. Multi 1 rforations er lateral b number of laterals to s�a""g � ly 2 <br /> p Y P� P Y f�t� 1 4 2 <br /> get total number of perforations. 2,5 14 1 g 2,$ <br /> —� x �- _�perforations. 3.0 13 17 26 <br /> 'a'�'S ���``�, 3.3 12 16 25 <br /> 7. Determine required flow rate by mulriplying 4.0 11 15 23 <br /> number of perforations by flow per perforation 5.0 1� 74 22 <br /> � X �IIl�p2iE �gPm• MNMiDID LOUhD �T E�A Of piE4AqE dSTNIBUTION M'TEM <br /> w'r�° <br /> 8. If laterals are connected to header pipe as shown on upper � <br /> example, to select minimum required lateral diameter; enter �::;~ <br /> rt+..a— <br /> table with perforation spacing and number of perforations s,,,��`"`� ��"` <br /> per lateral. Select min�, �um diameter for ���^`" <br /> perforated lateral =�L inches. <br /> � I�YOt/i 0�'EMOR�T[D V�/F l�T[P�LS/OR <br /> 1NC55111[pSlpyyllpl W rpYlp <br /> ' Nwart Atlrr wR <br /> �R��n <br /> 9. If perforated lateral system is attached to manifold pipe near == � ��� ���'A�~���� - <br /> +'�s <br /> the center, lower diagram,perforated lateral length and -�':.,.a..,,�.>e„�> <br /> � .,,,.,�.� / <br /> number of perforations per lateral will be approximately one '°� '' ----a,�/ <br /> half of that in step 8. Using these values,select minimum C�� �b. � ��� <br /> diameter for perforated lateral = inches. �,�i"�d FA�"�''�`�µ ��, <br /> \ ��tr�^' <br /> ��� <br />