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F-17 <br /> rrrnrP SEL.E�TION PROCEDL_m_E <br /> E/Q PEfIF'ORATION Of � PEHfORATED �4TEpAl <br /> A Determiae pump capaa.ty: w-�" <br /> Gravity Distribution T»»u '�y <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm) ro stay ahead of ,.�.-.,: ••� �• M�..»„w F,,,k,M,,,. <br /> �r ,.. <br /> WS�r Ll$e m�. t/w/6N l/PM YrA MI�N tiR w ww cww.� <br /> 'Mi�eN mY�MVRI <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 , MM.��"����..�°^'.'^ <br /> .,��..,.., t.. <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. y; ,,-y�«.� �:•�.�.o. <br /> .��«<<„�., <br /> . ..,«.��.�.�«.� <br /> Pressure Distibutlon 0Mi7r"'�" ''�"'"«",•"� <br /> 3.a. Select number of perforated laterals 3 ` � . <br /> b. Select perforation spacing= a:S feet .°«�".�;�.�"'"' <br /> c. Subtract 2 fti from the rock layer length. <br /> �--�-2 ft.= aS . fee� <br /> d. Deternune the number of spaces between perforations. <br /> I,ength perf,spacing a�ft.+�Et.=1�spaces Requi:ed Perforation Disch e <br /> e. �spaces+1=�_Perforations/lateral �+S���'41�,u«cBP.,� <br /> f. Muldply perforations per lateral by number of laterals to �a� '�2„��,,, ��°�►�' <br /> get total number of perforations. �-�-,, x-�--Q,,= 3�perforations. �tcec� <br /> g' �" "��-�gP� 1.Oa 0.56 0.7� <br /> SELECTED PUMP CAPACTTY�_gpm Z.��J �.8� 1.�4 <br /> B.Determine head requirements: a.Use for single family homes <br /> 1. Elevarion difference between pump and point of discharge. b.Use for all other applications <br /> �_feet <br /> 2. If pumping to a pressure distribution system,five feet for pressure <br /> required at manifold if gravity system,zero. <br /> _ � _feet <br /> 3. Friction loss <br /> a. Enter friction loss table with gpm and pipe diameter. �P���8� <br /> Read friction loss in feet per 100 feet from table. Point of Discharge <br /> F.L._ ),1 1 f�/100 ft of pipe T��y <br /> b. Determine total pipe length from pump to discharge �evation Differencel <br /> poinG Add 25 percent to pipe length for fitting p�,n,p q�� <br /> loss,or use a fitting loss chart. Equivalent pipe <br /> length-1.?5 dmes pipe length= F-18b <br /> �x 1.25=�1 � feet 1.5 inch 2.0 inch 3.0 inch <br /> c. Calculate total friction loss tiy multiplying � �;�,�..��oo a�P;a <br /> friction loss in k/100 h by equivalent pipe length. 10 0.69 0.20 <br /> Total fricdon loss= 1„ � 1 x � I � +100=�_feet 12 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, 14 1.28 0.38 <br /> special head requirements,and total friction loss. 16 1.63 o.a8 <br /> 18 2.03 0.60 <br /> 20 247 0.73 0.11 <br /> �_+�_+ � ?S 3.73 1.11 0.16 <br /> (1) (2) (3c) 30 5.23 1.55 0.23 <br /> 35 7.90 2.06 0.30 <br /> 40 11.07 2.64 0..39 <br /> TOTAL HEAD �_feet � 45 1a.73 3.28 O.a8 <br /> 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> C. Pump selection 6o s.bo o.s2 <br /> 1. A pump must be selected to deliver at least <br /> �y_gpm (Step A) with at least '1 � feet af total head (Step B). <br />