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, PUMP SELECITON PROCEDURB � <br /> -\A. Dehrmint pnmp capacity: <br /> / o+o �ow►rion aR � �r+Foa�rm uttna. <br /> Gravity DlaMbadon <br /> 1. Minimum suggested is 600 gallona per hour(10 gpm)ro etay ehead of w.,ew. . <br /> weter use rate. � <br /> 2. Maximum suggested for delivery to a drop box of a home system Is 2,700 .. � <br /> , •.,:.;:�;,.;. <br /> gallons per hour(45 gpm)to prevent build-up of pressure in drop box. �'�''w�r••w�.r•• �^k'�"�«���..�.i'' <br /> Presaure DlsWballon • . '"� �""'���� <br /> 3. s. Select numberof perforeted laterals •--_.___ �,• : <br /> ���� <br /> b. Select perforaHon specfng• - ft. ��+'�:. ':. . :.. r»�wi.�'�.e.�« <br /> ,..., <br /> c. Subtract 2 f�from the rock layer length. �t..• c�aw u,« ���«i�«. <br /> =2 f�+��ft. '„ ��•�� ,.:�:,�,,f,u; .�.:�d;.,�, <br /> '�� � ��'���..+�" <br /> d. Determine the number of spaces between perforations. <br /> Length perf.apecing• . ft.+ ft.• ---- --aPace� TABtB OF PBRNORA710N Dt9CHARC841N CPM <br /> e. spaees+1•---�- perforaHons/lateral <br /> �� <br /> ' f. Multiply perforaHons per lateral by number of laterais to t-t�.d P�rto�.��dum�an^�nea) <br /> get total number of perforallons. ,�� ,�� <br /> �� x��--- perforations. <br /> �.o. � o.s� oa4 <br /> . -� .-- �.s o.� 0.90 <br /> 8• � x p,,, �r: " gpm• z.ob o.eo t.a <br /> zs o.n ta� <br /> SELEC'I'ED PUMP CAPACITY� 3.0 o.9e t.2e <br /> 8P"� rnQ'� �A �.t3 t,�� <br /> . s.o �.a� �.bs <br /> B.Determine head rtquirementa: .vee t.o rooe ot tk.a ta r�wen�.t ry.�en+�. <br /> �'� �. Elevallon differerxebetween pumpand pointof discharge. •bu.ezokecott,udtaaheraabt�i,a,e+►b <br /> �feet . <br /> 2. If pumping M s pressure distribuNon system,add five feet for pressure <br /> required at manifold <br /> "` feet • � <br /> 3. Fricdon loss � �'��"g . � <br /> a. Enter frlcdon loss table with gpm and pipe diameter. Poinc o[D�ogar�e <br /> Read friction loss in feet per 100 feet from table. <br /> F.L»= 3��� ft./100 ft of pfpe . Eiev.tion Dit'Ferencx <br /> b. Determine total pipe length from pump to discharge . p,�,p �S <br /> point. Add 25 percent to pipe length for fitting . <br /> loss,or use a fitNng loss chart. Equivalent pipe . F-18b <br /> length-1.25 Nmes pipe length= • 1.S inch 2.0 inch 3.0 inch <br /> �.�.0 x l.?5= ez�.,,j feet . � �onb..p.�oone�aa <br /> c. CalculaM total frlction loss by multiplying �0 0.69 0.20 <br /> Eriction loss in ft/100 ft by equivalent pipe length. 12 0.96 0.28 <br /> Total friction loss= � � x �a. � +100=_� _feet 14 1.28 0.38 <br /> 4. Total head rec{uired is the sum of elevativn differcnce, i8 �03 0.60 <br /> special head requirements,and total fricNon loss. � 20 2.47 0.73 0.11 <br /> ' 2S 3.73 1.11 0.16 <br /> a y + � ��_ 30 3.23 1.33 0.23 <br /> 35 7.90 2.06 0.30 <br /> (11 (2) (3c1 40 11.07 2.64 0.39 <br /> • _45 . 14.73. C.3.28> 0.48 <br /> TOTAL HEAD �:, feet SO • 3.99 O.SS <br /> SS 4.76 0.70 <br /> . 60 5.60 0.82 <br /> '�'�C. Pump selection <br /> l. A pump must be selected to deliver at least�gpm (Step A) <br /> with at least �� feet of total head (Step B). <br />