Laserfiche WebLink
F-17 <br /> ��SELECTION PROCEDLrnE <br /> EfD PERFORATION CF q pERFORATED L4TER4l <br /> A. Determine pump capacity: <br /> ��� <br /> Gravity Distribution <br /> T�,..,, <br /> 1. Minimum suggested is 600 gallons per hour(10 gpm)to stay ahead of . <br /> water use rate. • ��^.�,,,,�,,,. �"b=«'_;Q�k�_ <br /> �.�,.,b,a.,�.., <br /> 2. Mazimum suggested for delivery to a drop box of a home system is 2,7Q0 . ���d��»a��=��=�ti <br /> nro coo n.ar too <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. ,:,,.q»e ��_�p«, ,�,E,,. <br /> Pressure Distibuhon S�� o r'rf��' S f/E�T �,..,�,.,,,,� ��`�°f«�•�%�°°` <br /> 3.a. Select number of perforated laterals <br /> b. Select perforadon spacing= feet �^«W��� •.����� <br /> BN�Pleuwv SenO Lc'w <br /> c. Subtract 2 h.from the rock layer length. <br /> ����-2 ft.= feet <br /> d. Determine the number of spaces between perforations. <br /> Length perf.spacing= ft.+ ft.= spaces Etequued Perforaton Discha:ge <br /> e. spaces+ 1 = pesforations/lateral �,�u��a,u,uce�m> <br /> f. Muldply perforations per lateral by number of laterals to D�u:ge , <br /> Head /32 ma�.'' 3 me�� <br /> get total number of perforations. �� x���= perforations. �f��� <br /> g' -ge+r Xsawa�- gPm- <br /> 1.Oa 0.56 0.74 <br /> SELECTED PUMP CAPACTTY v�8 gpm 2.�b �.8� 1.�4 <br /> B.Determine head requirements: a. Use for single family homes <br /> 1. Elevation difference between ump 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 Z 60 � <br /> a. Enter friction loss table with gpm and pipe diameter. Pipe Lrng�h <br /> Read triction loss in feet per 100 feet from table. ' ' ��/°Z`�.5 <br /> F.L.= 9. S ft./100 ft of pipe 5„ 5�� µ� Po��of Dischargc <br /> b. Determine total pipe length from pump to discharge Flevaaon Differznce l <br /> point. Add 25 percent to pipe length for fitting <br /> �Pe�= l008, <br /> loss,or use a fitting loss chart. Equivalent pipe S <br /> length-1.25 times pipe length= F-18b <br /> a�fl x 1.25 = 3 0�, _feet <br /> .5 inch 2.�inch 3.0 inch <br /> c. Calculate total friction loss by multiplying � lar�ioon�rP�a <br /> friction loss in h/100 h by equivalent pipe length. 10 0.69 0.20 <br /> Total friction loss= `l• 8 x 3a5 +100=�feet 12 0.96 0.28 <br /> 4. Total head required is the sum of elevation difference, 14 1.28 038 <br /> special head requirements,and total friction loss. 16 1.63 0.48 <br /> 18 2.03 0.60 <br /> 20 2.47 0.73 0.11 <br /> ��+ 5 + 302 ZS 3.73 1.11 0.16 <br /> (1) (2? (3c) 30 SZ3 1S5 0.23 <br /> 35 7.90 2.06 030 <br /> TOTAL HFAD �3 feet 40 11.07 2.64 039 <br /> 45 14.73 3.28 0.48 <br /> 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> C. Pump selection bo s.6o o.sz <br /> 3S -- �,9c7 '7 !�/��oJ-�T►� <br /> 1. A pump must be selected to deliver at least r '38 - � - 3•�� <br /> _�gpm (Step A) with at least 53 feet of Eotal head (Step B). � � �o - ►i.07 -- <br /> � _ � X_9. 8 <br /> S 3•/7 <br /> 7= /,9 <br />