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['UM(', SC�fION ('ROCf:UURE <br /> A. Dciccminc pump capacity: <br /> Cravily Dislribution <br /> 1. Minimum suggestcd is 20 g�>cn <br /> 2. Mauimum suggestcd is 45 gpm <br /> Pressu�c �istibutiort <br /> 3. a. Sclect�umber o(pc�(orated latcrals rc�ior.�io�o;sch,�g�S;,,GrM <br /> b. Se(ect perforalic�n spacing = __ fcct. <br /> fiead Per(o�ationdiame�er <br /> c. Subtcacl 2 ft. frt�rn tlic rock layc�Ic�gth. �re� �nches <br /> R.�c1 4Tc�Ic�(�A <br /> - 2 ��. __ fect. 7/32 ��q <br /> d. �eterminc tlic number of spaces bctwcen per(orations. �.o, o� p�� <br /> Length perf. spa,:ing = _ (t. � _ft. = spaces � �S o.69 0.9p <br /> 2.06 0.80 l 04 <br /> e. spaces + 1 = perforations/lateral <br /> [. Multiply pecforations per latc�al by numbcr of latecals to ' �1K ��fooc siogle I�ornes <br /> b llsc 2.0 fcet(or any�hing etsc <br /> get total numbcr of pe�(o�ations. ��r x � � � = perforations. <br /> S� �rrr X�v�.r'-�-BPm. <br /> SELECTGO PUMP CAPACfiY�L� gPm <br /> B. Determinc head requiremenLs: 50��'�°•'^,�^">•.'. <br /> I. Elcvation diffcrencc between pump and point of discharge. °��'��°��OrO <br /> �� fcel ro�.i���i��bu. <br /> 2. If pumping to a pressure distribution system, five feet for pressure -% <br /> �� <br /> required at manifold if grav�t s stem, zero. ��� <br /> nlet Llev�uon Udfcrrncr <br /> �__ �CCI �,�� : <br /> 3 Friction lo>: ' _.. .. . '� I <br /> a. Ente�friction loss table�vith gpm and pipe diameter. � . 9p <br /> . . .7 -... .. .. ........... ... <br /> Read friction I�ss in(eet per 100 fect [rom table(F-14). _ <br /> F.L. _ ___,. ft./100 ft o(pipc <br /> b. DeteRr►ine tolal pipe length (rom pump to discharge Frietion Loss in I'lastic Pipe <br /> point. Estimate by adding 25 percent to pipe length Eor fitting Nominal <br /> loss,or use a litting loss chart(F-15 feetj. pipc dia. <br /> Equivalent pipe length- 1.25 times piPe length= Flow Rate �5" 2' 3� <br /> _ z 1_25= feet. gpm <br /> c. Calculate total (riction'loss by multiplying <br /> friction loss in ft/100 ft by equivalent piPe length. 20 2_47 0.73 O.tl <br /> Total(riction loss = z +100= � feet 25 3.73 1.11 0.16 <br /> 30 5.23 1.55 0_23 <br /> 4. Total head requiced is the sum o(elevation dilference, 3S 6.96 2.06 030 <br /> special head requireme�ts,and total (richion loss. 40 8.91 2_64 0.39 <br /> 45 11.07 3.28 0.48 <br /> _ _l ,3 + S + '� SO 13.46 3.99 0.58 <br /> SS q.76 0.70 <br /> (1) (2) (3c) 60 5.60 0•82 <br /> 65 6.48 0.95 <br /> '[�OTAL HGAD � fect 70 7_qq 1.� <br /> C. ['ump selcction <br /> 1. A pumj� must be selected to detiver at least <br /> �D� .(�pm (Step_A) witltat (east 2O feeE.oE.total.head �t.� I�).: <br /> ... � •..P . <br /> ; _. , _ :, . <br /> _. ;��., _ <br /> ...,........�%..:�. .. . ... � .�:r�.:itr. .:,.. . � <br />