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�, <br /> PL1MP SELECTION PROCEDUIZ� <br /> A. Determine pump capacity: <br /> Gravity Distribution ENo PERFatATION OF A PERfORATEO LATERAL <br /> 1. Minimum su�ested is 600 gallons per hour(10 gpm)to stay ahead of �c,a..co�.. <br /> water use rate. "�--F---� ; ` <br /> ToDwil <br /> 2. Maximum suggested for dclivery to a drop bc�x of a home system is 2,7IX) � =-,:-�- , -�--- <br /> � �,Lo w ol Geo1nIH�Fabk la lov• <br /> gallons per hour(45 gpm)to prevent build-up of pressurc in drop box. : ��„sa�e►�.. � ��K�ew•o��,«a,�.��.�.d <br /> .��e,�a,«��,aoe,� <br /> � �'y('����� f'1»�-Perloralion O�Iq�d 1lorveMolly <br /> Pressure Distribution L�t'• c•� z`� uno�o r+eu. reo <br /> 3. a. Sclect numbcr of rforated laterais ;'�:a��. � ��-�-a Leo�t 12'�o Edp� <br /> �' �Droin FI�Id.Rocl�}- ��.,.,:.�� al pxM Loya <br /> b. Select perforation spacing= ft. ` <br /> --PBIwo1bM lAculed ol <br /> c. Subtract 2 ft.from thc rock laycr length. c,w���a�r.� B°"°^�°'�°'.�°' <br /> 2ft.= ft. _ . . . <br /> oc aycr ng� � <br /> OrI01no1 Soll Roparlr Scanlied <br /> � �,(qre Nlachq Sand Loyer . <br /> d. Determine the numbcr of spaces betwcien pC�'ftsratio►ls. �� . ; ` ;'"' ' :`" '` ' . " -�� .- <br /> Length perf.spacin�= ft.+ ft.'= sp�7CCs � TABLF.OT PGRiaORA710N UISCf IARCGS IN CPM <br /> e. spaces+ 1 = perForations/latcral <br /> ' f. Multiply perforations per lateral by numbcr of latrrals to rt��d Pcdoration diat�eter(inches) <br /> get total number of perforations. <br /> x - rforations. ��" ��� <br /> ,�f��.T. �.e �e�.i- � <br /> 1.Oa 0.56 0.74 . <br /> 1 S 0.69 0.90 <br /> � O' perle X SPT SPm. . . �2.ob Q.� �.� <br /> � 2:5 0.89 1.17 <br /> SELECTED PUMP CAPACITY28/Z m 3.0 0.98 1.28 <br /> 8p 4.0 1.13 1.47 <br /> SA ].26 1.65 . <br /> B.Determine head requirements: sUse 1.0 foot oEhead for rnaidentiel systems. <br /> ]. Elevationdifferencebetwcenpumpandpc�intofdischarge. bUse2.Ufeetofheadtorotherescabiishments <br /> �feet - <br /> 2. If pumping to a pressure distribution systcm,add five feet for pressure <br /> required at manifold <br /> �_feet <br /> 3. Friction loss �'��"g�h <br /> a. Enter friction loss table with gpm and pipe diamctcr. Point of Discharge <br /> Read friction loss in feet per 100 feet from table. <br /> F.L._/S'.S"' ft./100 ft of pipe . Elevation Diffcrcnce <br /> b. Determine total pipe length from pump tcs discharge Pump <br /> point. Add 25 percent to pipc length for fitting <br /> „ <br /> loss,or use a fitting loss chart. Equivalrnt pipe F-lsb <br /> length-1 25 Hmes pipe length= . , ,. ,,..,,. „� 1.5 inch 2.0 inch -3.0 in h . <br /> • .- • , ;: <br /> _ .. � _ , <br /> _ ,•:r�i+�" z 1.25=�_fect � '' spm F��d��,��..,�.�oo n�r P�,� � <br /> �� <br /> c. Calculate total kiction loss by multiplying , l0 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 1'.,,�'.S�'+1(x)_ • z�feet t4 1.28 0.38 <br /> 4. Total head required is the sum of elevation diffcrcnce, 16 1.63 0.48 <br /> special head requirements,and total friction loss.' 1g . 2.03 0.60 <br /> 20 2.47 0.73 OJ 1 <br /> 25 3J3 1.11 0.16 <br /> �+�_+ 5.23 0.23 <br /> (1) (2) d� � 7.90 � 0.30 <br /> 40 11.07 2.64 0.39 <br /> 45 14.73 3.28 0.48 <br /> TOTAL HEAD �feet 50 3.99 0.58 <br /> 55 4.76 0.70 <br /> 60 5.60 0.82 <br /> �. Pump selection <br /> 1. A pump must be selected to deliver at least��pm (Step A) <br /> with at least� feet of total head (Step B). <br />