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i <br /> . , . . � <br /> PUMP SELECTION PROCEDURE <br /> _ A. Determine pump capacity: j <br /> .. Gravity Dlstrlbution ao ro�ow►� a► � r�►t� � ' <br /> l. Minimum suggeated ia 600 gallons per hour(10 gpm)b etay ahesd of �..�.,,. . <br /> water use rate. � � : <br /> 2. Maximum suggested for delivery to a drop box of a home sysbem is 2,700 .:.:....:: ...� .. :;,.,:�. ' � <br /> ;,�;.,:: . .r=-• �I M.w.M.wM ar r�.- . <br /> gallons per hour(45 gpm)to prev�ent build-up of pr+essure in drop box. a-; w�r sw�w•► ���1"',.�.«�,,. <br /> '�`�` �M�.�'� <br /> Pressure DisMbutlon • �• �•►�r�'"�;; <br /> 3. a. Select number oE perforated laMrals 3 '�' N,���,; <br /> b. Select perforation spacing= � ft. �'�: . . �•.•'",. ' <br /> �_. . . . rw�wwio:w�M« i ' <br /> c. Subtract 2 f�from the rock layer length. �',.: u��� '"""""'�""'' <br /> ���i�-2 ft._�i _ft. , } ,�::::�.�,�;.:�c,y►�:.�++-.,,� <br /> • �aiw sM s�.Mw <br /> �«.��w. <br /> d. Determine the number of spac�es between perforations. <br /> Length pe*f•specing=�_f�+�ft._.��apaees r�8►�o�reRNo�►t7a�t oeCtr�N Cr�t; <br /> e. ��_spaces+1=�_�perforations/lateral <br /> ' f. Multiply perforations per lateral by number of laterals to � �d�(� <br /> get total number of perforations. „ , , � : : � <br /> �«r. X ��� ...�s�'�Perforations. �l�� o,sa . �' /' : <br /> , <br /> �.o. � o.� oa� ; ' ,. <br /> �s o.� � a�o � , <br /> 8• � X�,-S„�r=.�z SP�• z.ob o.eo �.a <br /> ' z.s ae9 ta� � <br /> SELECrED PiJMP CAPACITY � 3A o.9e t.za ; ; <br /> -�--gP 4A 1.13 lA7 i • <br /> SA 1.26 1.66 <br /> B.Determine head requirements: ' j <br /> �� l. ElevaHon differencebetween m and int of discha ��tA�O0�0�����'"�' i <br /> P� P P� *8'�• w�z.o r.�s or w.a to�oa�.r«aeear�.w <br /> �' feet . " <br /> 2. 1E pumping to a pressure distribution system,add five feet for pressure � ` � <br /> required at manifold . ; <br /> �_feet � <br /> 3. Friction lo� RPa�6� <br /> a. Enter friction lo�table with gpm and pipe diameter. p�� <br /> Read friction loss in feet per 100 feet from table. � . <br /> F.L._ �..to ft./100 ft of pipe � p�p�� . ; <br /> b. Determine total pipe length from pump to dixharge �,j <br /> point. A d d 2 5 percent to pipe lengt h for fitdng . ; <br /> loss,or use a fitting loss chart. Equivalent pipe F-186 . � ' <br /> length-1.25 Hmes pipe length= � . � <br /> L�D x 1.25= a,'Z feet 1.3 inch 20 in�h 3.0 h�h � : <br /> � �a�.�e.�p.ioos.t�. , <br /> c. Calculate total friction loss by multiplying 10 0.69 0.20 # ' <br /> friction loss in ft/�00 k by equivalent pipe length. 12 0.96 0.28 ! � <br /> Tocal fricdon lo�_ �► � x a.t„ +]00 a � �eet 14 1.28 0.38 a ' <br /> 4. Total h�d required is the sum of elevation difference, 16 1.63 0.48 <br /> special head requirements,and total friction loss. � 2 47 � 0.73 0.11. i <br /> � ZS 3J3 . 1.11 0.16 <br /> �+_y�+_� 30 3.23 I.SS 0.23 i <br /> (1) (2) (3c) � 3S 7.90 Z.06 0.30 ; <br /> 40 11.07 2.64 0.39 <br /> ' 4S 14.y3- _ 9.28 0.48 ; ' <br /> 'I'OTAL HEAD �feet � ' 3.99 OS8 ! <br /> SS 4.76 0.70 <br /> - 6o s.6o o.az ' <br /> �"�C. Pump selection • <br /> 1. A pump must be selected to deliver at least��gpm (Step A) <br /> with at least�_feet of total head (Step B). <br /> . ;� <br /> i <br /> � • <br />