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PRESSURE DISTRIBUTION SYSTEM Geotextile fabric
<br /> _ , , .. .
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<br /> 1. Select number of erforated laterals 3 � '�:°�:��'3:r�_. ��
<br /> P .. arter inch erforaHona s aced O 3' .-..�,...�i : .,,:.�
<br /> - oq�S;o ty:vo.v
<br /> .N.:.�al`a.���j��•'p:i���'G't�r'b'�!�2�'h:4.'i.'.�O' a,9'Ci"r:C6.yC'.4�'v'f�`''�?o��..�M1r.
<br /> :. .o r '�s'r. A� `�'.dd? i' io. r" K�.'aao '�5�.,��'e�8•t
<br /> '{E � ''r C.�� b'O h� " ' fs� ..
<br /> 3 c� fee� �'��+,'� .��R:'�'7.'C.y:.������oa:,���• :F�����.ru:;U�°-���.��.,.
<br /> �: � �;. . . � �.:.�;<.:�� 4..�-
<br /> 2. Select perforation spacing= • ;s �, ��^ti:r,'q;)'O'b!UG+'o� � ,�x-;:;�.:.�...,;.�.<.� �,; �
<br /> �t; '���'u h: �, �;•r,,e ,.;,.�,.:. , r,, �a:.
<br /> a.��. <�a. a�.r:CT'L?NS'-.�Ca' v ,��r. .�,�:.�;.:r ,�.
<br /> Perf Sizing 7/32"-1/4"
<br /> 3. Since perforations should not be placed closer than 1 ft. to Perf Spacing 1.5�-s�
<br /> the edge of the rock layer (see diagram),subtract 2 ft. from
<br /> the rock layer length. Pertoratlon Discharges in gpm �
<br /> `d 2 ft. _ �So fee� perforc�tian dlameter
<br /> yer en - . h60d IIlCh9S
<br /> � (feet) 1/8" 3/16 7/32 1/4
<br /> 4. Determine the number of spaces between perforations. �,pa 0.18 0.42 0.56 0.74
<br /> Divide the length above by perforation spacing and round '
<br /> down to nearest whole number. 2•0�' 0.26 0.59 0.80 1.04
<br /> . 5.0 0.41 0.94 1.26 1.65
<br /> Length perf. spacing=�ft. + 3 ft. = a�spaces �u��.0 foot for single-family homes.
<br /> �3� �2� b Use 2.0 feet for anything else.
<br /> • PotenNal fot plu0ging
<br /> 5. Number of perforations is equal to one plus the number of
<br /> perforation spaces . _ �
<br /> �spaces + 1 =�perforations/lateral iM��t n�anr�<lo%�discharge variation
<br /> Perforation
<br /> 6. Multi 1 erforations er lateral b number of laterals to � S a`u'g �, jy 2
<br /> p y p p Y . �f�t� 14 2
<br /> get total number of perforations. . 2,5 14 18 Zg
<br /> ''� �`' 3.0 13 17 26
<br /> � x �_�perfora�ions.
<br /> 3.3 12 16 25
<br /> Calculate the square footage per perforation(6-10 sqft/perfl 4.0 11 15 23
<br /> System area: l� x �� _�_ � 5.� 10 14 22
<br /> S� + ���-�_sqft/perf '
<br /> . MANIFOLD LOG7ED AT Dq OF PRESSURE qSiRIBVTION SYSTEM
<br /> 7. Determine required flow rate by multiplying�
<br /> number of perforations by flow per perforation � �
<br /> ��
<br /> -� X�s� —�-8Pm ,,��-�.�
<br /> r�
<br /> 8. If laterals are connected to header pipe as shown on upper �`/'°'"�
<br /> example,to select minimum required lateral diameter;enter
<br /> table with per.foration spacing and number of perforations y�rpyT pF P[p/OMTFO PIK LAT[IUlS PoR
<br /> n�cssune asteuurwn N wano
<br /> per lateral. Select minimum diameter for
<br /> .�.��»,K..�
<br /> perforated lateral= � inches. �,,,�,�,,, W �„p„.�°
<br /> v1EW
<br /> � M
<br /> �
<br /> 9. If perforated lateral system is attached to manifold pipe near ..�.�.�.�«
<br /> the center,lower diagram,perforated lateral length and �" -��.�.�
<br /> number of perforations per lateral will be approxirriately one �,w ,�
<br /> half of that in step 8. Using these values,select minimum �d,�"'`� �.N:���
<br /> diameter for perforated lateral=��inches. �
<br />
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