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PRESSURE DIST�IBUTION SYSTEM END PERFORATION OF A PERFORATED LATERAL <br /> �craa Cover <br /> 1. Select number of perforated laterals 3 �`" <br /> ro�u ,+�� <br /> 2. Select perforation spacing = 3 feet. ` ` '� ��ay� of Geot�xtlla FaDrk ca��� <br /> r l.oamy Sand l�yer ' Inch layer of hay a ctraw covered <br /> �:wltA rW rosfn paper) <br /> Perforalion Drllled HorizoMally <br /> �- �. . . ,� Into Cap Neor Top <br /> 3. Since perforations should not be placed closer than 1 ft. to , <br /> /� Plus , A� L�oct 12'to Edqa <br /> a Fl�ld Rodc .�' of Rock Layer <br /> the edge of the rock layer (see diagram), subtract 2 ft. from <br /> the rock layer length. ��.o�sa�d �yH P.<<o�a��o�s�`a,ed o' <br /> Bottom of Lateral <br /> � �� ft. _ `1� feet. 0��4��a� So�� Properly Scanfiad <br /> Rock layer leitgth Belae Placinq Sand Layer <br /> Required Perforation D�scharge <br /> 4. Determine the number of spaces between perforations. m gal�ons per minute(gpm) <br /> Divide the length above by perforation spacing and round DH15 e dgc s,��� ;����� <br /> down to nearest whole number. �f��� <br /> 1.Oa 0.56 0.74 <br /> Length perf. spacing = y �' ft. _ � ft. _ �spaces 2•Ob 0.80 1.04 <br /> �3� �2� a.Use for single family homes <br /> b.Use for all other applications <br /> 5. Number of perforations is equal to one plus the number of <br /> perforation spaces . <br /> Maximum number of quazter inch perforations pe <br /> �spaces + 1 = /7 perforations/lateral lateral to guarnantee<10%dischazge variation <br /> Perforation <br /> 6. Multiply perforations per lateral by number of laterals to S�f�jg 1� j� 2 <br /> � get total number of perforations. 2„5 14 18 2g <br /> ,3 r�,5 x ����= s'� perforations. 3.0 13 17 26 <br /> 3.3 12 16 25 <br /> 7. Determine required flow rate by multiplying 4.0 11 15 23 <br /> number of perforations by flow per perforation 5.Q 1� 14 22 <br /> SI � X �• ?y f_�gP�• MANIFOLD LOCATED AT END OF PRE$SURE pSTA�BU7qN SYSTEM <br /> � <br /> �,�. <br /> 8. If laterals are connected to header pipe as shown on upper '� <br /> exa�ple, to select minimum required lateral diameter;enter %b�1" <br /> table with perforation spacing and number of perforations ,,�`� '�'"��` <br /> per lateral. Select minimum diameter for ��`"`� <br /> perforated lateral = i% inches. <br /> 4YOUT Of/EAIpMTFp M/E UTE11�15 IOR <br /> MESSIME DISTRiluTlpl W MOUMD <br /> � [ pu[0 K�S K I�'[ <br /> �UrtOMTiqi lMQO M' W�'�M" <br /> _ 9. If perforated lateral system is attached to manifold pipe near �"° «`��"`�'`�'� ��",�o ��„�..--r <br /> the center, lower diagram,perforated lateral length and K�;��„n���a d ..-- <br /> number of perforations per lateral will be approximately one � •�,�.�.;�;;w <br /> half of that in step 8. Using these values, select minimum _�,��, ,,, ��,, � <br /> �` � <br /> diameter for perforated lateral = I %y inches. -- ,� °` Y�n��. <br /> � ��d <br /> � <br />