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PUMP SELEC"i'ION PROCEDURG <br /> A. Determine pump capacity: <br /> Gravity Distribution � ���T�� � A PERFORATEO LATERAL <br /> l. Minimum su�ested is 600 gallons per hour(10 gpm)to stay ahead of �c.a..co�.. <br /> 1 �"_l t_. <br /> water use rate. ' <br /> ' TovsoJ <br /> 2. Maximum suggested for delivery to a drop box of a home system is 2,700 �. --.:---,--',��,%'�. � <br /> Layw ol Geol��til�FoWk(a Iw- <br /> galions per hour(45 gpm)to prevent build-up of pressure in drop box. - � ��r sa�a�,�.. � ���a„.o�,�,,,,,,,,,,�,,,,,., <br /> �. M�e rca rosi�,,�qa1 <br /> n wq� q�nn Palaa�wn auaa �io.�.emonr <br /> �ii�',r:... Mlo Ca0 Near iop <br /> Pressure Distribution , � ' �--��_a ��tl�� �z•�o«o. <br /> 3. 8. Select numbcrof perforated laterals �Qion�FN10 Ra^_M.•• ..���' ol Rotk LaY�r <br /> b. Select perforaHon spacing= ft. � ` <br /> •-Ptrlwaliw�s Locoled ol <br /> C. Subtract 2 ft. from the rock layer length. �.- c,w�Sand Luya Bouom ol La���ul <br /> ��-2ft.= ft. <br /> . Or101no1 Sol� proptrly Scurified <br /> Bafort VbcMq Sond Loyer <br /> d. Determine thc number of spams betwcen perforations. <br /> Length perf.spacing= ft.+ f t.= Sp�CCS TABI.E O�PGR{apRATlON UISCt IARCIS 1N C!'M <br /> e. spaces+1 = perforations/latcral <br /> ' f. Multiply perforaHons per lateral by numbcr of latcrals to Hcad Pcrforation diameter(inches) <br /> get total number of perforations. - <br /> x - rforations. ��" ��' <br /> �r. . �K.�- P� <br /> 7.Oa OSG 0.74 <br /> p I5 0.69 0.90 <br /> p' �(s X gT gPm• Z.ob �.� �.� <br /> 2S 0.89 1.17 <br /> 3.0 0.98 1.28 <br /> SELECTED PIJMP CAPACITY�_gpm 4.o t.t3 1.9� <br /> 5.0 '126 1.65 <br /> B.Determine head requirements: <br /> 1. Elevation difference between m and �nt of dischar e. aUse 7.0 foot of head for residential systems. <br /> �p � � bUse 2U feet oE head for othcr establishments <br /> feet <br /> 2. If pumping to a pressure distribution system,add five feet for pressure <br /> required at manifold <br /> � feet <br /> 3. FriCtion loss � Pipe Length � <br /> a. Enter friction lass table with gpm and pipe diamctcr. Point of Discharge <br /> Read friction loss in feet per 10()fcet from tablc. <br /> F.L._'�ft./100 ft of piPe Elevation Difference <br /> b. Determine total pipe length from pump to discharge Pump <br /> point. Add 25 percent to pipe length for fitting <br /> loss,or use a fitHng loss chart. Equivalent pipe F-18b <br /> length-1.25 Hmes pipc length= <br /> 1.5 inch 2.0 inch 3.0 inch <br /> ��x 1.25=�fect g�,m ���d,�a.��oo n�r P�� <br /> c. Calculate total fricdon loss by multiplying �0 0.69 0.20 <br /> friction loss in ft/100 ft by equivalen�ipe la�gth. 12 0.96 0.28 <br /> Total fricdon loss= �Z x /•.�.�1(X)_�_feet t4 1.28 0.38 <br /> 4. Total head required is the sum of elevation diffcrencc, 16 1.63 0.48 <br /> s ial head uirements,and total friction loss. 18 2.03 0.60 <br /> p� reQ 20 2.47 0.73 0.11 <br /> 25 3.73 �l1� 0.16 <br /> _�+ .Jr +__� Q� 5.23 / .�53 ) 0.23 <br /> 35 7.90 �r 0.30 <br /> (1) (2) (3c) 40 11.07 2.64 039 <br /> 45 14.73 3.28 0.48 <br /> TO'TAL HF.r1D �� feet 50 3.99 0.58 <br /> SS 4.76 0.70 <br /> 60 5.60 0.82 <br /> �. Pump selection <br /> 1. A pump must be selected to deliver at least ?7 gpm (Step A) <br /> with at least��,feet of total head (Step B). <br />