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_ Pt�'SEL.ECTION PROCEDURE <br /> A. Determine pump capacity: <br /> CGravity Distribution oro �a�oRanor� oF a PERFORATEO LATERAL <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of a„„�,,,M <br /> water use rate. <br /> Topwll <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 .,, _..., ... ..,, ;,,,,�,._ <br /> allons r hour(45 m)to revent build-u of ressure in dro box. :i�' �,«,,,,s„w�,�,� '' '-° °r�°'•"���•F°°�k�a'°�- <br /> S Pe gP P P P p �-:, :'�`�,�''�.a��,;,a�..a <br /> a a� P«�«a�ton a��aa H«aa,�an� <br /> Pressure Distribution � h„ , ,�„ �p <br /> 3. a. Select number of perforated laterals � '�. �+w �'" , N �.a.� �z•�o�aa. <br /> � NI Rx .�• el RocR l.era <br /> b. Select perforaHon spacing= '� ft. :,. - `:�; � .�.. ' P,;i«o;i�'��.e ei <br /> c. Subtra 2 ft.from the rock layer length. x::�. c�w�s«�a�.a,.. ��'^^�•���••�, <br /> �-2ft.=�ft. - <br /> ak�no�su�� v.op�riy scv�n.a <br /> B�Iw�Plockp Sand Lerer <br /> d. Determine thc number of spac�s between perforations. <br /> Length perf.spacing= (��ft.+ 7 ft.=a�. spaces TABIE OF PERAORAT1pN pISCHAItCES IN CPM <br /> e. �a. spaces+ 1 = a�perforallons/lateral <br /> ' f. Multiply perforations per lateral by number of laterals to Head Perforation diameter(inches) <br /> get total number of perforations. � � <br /> � x � �' rforadons. �" �� <br /> �. �_-Z_pe <br /> 1.Qa 056 0.74 <br /> g ld'� X_, 5� _�gpm t s 0.69 0.90 <br /> P� 6�P�*{ 2.Ob 0.80 1 A4 <br /> 2S OB9 t.17 <br /> SELECTED PIJMP CAPACITY 3`� m 3.0 0.98 t,2g <br /> 8P 4.0 �.�a i.a� <br /> 5.0 ].26 1.65 <br /> B.Determine head requirements: <br /> l. Elevationdifferencebetween um and intofdischar e. aUsel.Ofooto(headfortesidentialsystems. <br /> � P � � bUu 2.0 feet of head for other establishments <br /> �_feet . <br /> 2. If pumping to a pressure distribution system,add five Eeet for pressure <br /> mquired at manifold <br /> � feet <br /> 3. Friction loss Pipc Lengih <br /> a. Enter friction loss table with gpm and pipe diameter. � Point of D;scharge <br /> Read friction loss in feet per l00 feet from table. reo�, <br /> F.L._ � , L ft./100 ft of pipe Elevation Diffcrence <br /> b. Determine total pipe length from pump to discharge p„n,P �._-.�; <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitdng loss chart. Equivalent pipe F-18b <br /> length- ].25 times�,�ipe length= 1.5 inch 2.0 inch 3.0 inch <br /> � L`,� x 1.25 = a � �� feet gpm Frialm los�pa 100 ft of pipe <br /> c. Calculate total friction loss by multiplying 10 0.69 0.20 <br /> friction loss in ft/100 ft by equivalent pipe length. 12 0.96 0.28 <br /> Total friction loss= � �� � x = ' • +100=�_feet 14 1.28 0.38 <br /> 4. Total hcad required is the sum of cic��ation diffcrcnce, 16 1.63 0.48 <br /> spccial head requirements,and total friction loss. 18 2.03 0.60 <br /> 20 2.47 0.73 0.11 <br /> 25 3.73 1.11 0.16 <br /> _�_+ � +�_ 30 5.23 1.55 0.23 <br /> �1� �Z) �3c) 35 7.90 2.06 0.30 <br /> 40 11.07 2.64 0.39 <br /> TOTAL HEAD a 50 14�73 3.99 0.58 <br /> LI feet <br /> SS 4.76 0.70 <br /> 60 5.60 0.82 <br /> C. Pump selection <br /> � 1. A pump must be selected to deliver at least- 3�I gpm (Step A) <br /> with at least �y feet of total head (Step B). <br />