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SECTION - 2 EQUALIZATION TANKS <br /> "erhn'n rnL. ("..ae N oe-leo) y. rw <br /> 43 jff .pSurr <br /> Ron rJlrr An>r> ' <br /> N.r. w.A-. ..-...a ce..6•r unw.l <br /> hrn,P.r.l,rr9 <br /> pinf <br /> ,I hY....... Cf�w.�.t)al w•••.•y <br /> Tank �Q�~ �MsIN' GNOS <br /> � (J <br /> Ssn F6.r aw%Nh .y..r w/.ca <br /> FIGURE 3-3 Equalization Tanks <br /> Equipment list : Zea. - 4500 gal . steel-poly liner tanks <br /> lea. - Lightnin Mixer (Model : NLDG-150 ) <br /> 13 . 1" propeller - 66"s . a . shaft . <br /> lea. - Kari float switch (Model : 4Y5E ) <br /> Zea. - Self priming centrifugal pump <br /> (Model : GNOK 1 1/2 / 2DL-D1 . 5C) <br /> Zea. - Foot valves <br /> 2ea. - Double union ball valves <br /> Wastewater is pumped from the lift <br /> station to be stored at equalization <br /> tanks A and B for treatment transfer. <br /> 2 . 1 Pump Operation 1 .The level of the wastewaters in <br /> equalization tank B rises to <br /> the first stage of the Kari float <br /> switch. The Kari float switch <br /> energizes one of the self priming <br /> centrifugal pumps . (FIGURE 3-1 ) <br /> 2 . If the first pump fails to hold the <br /> water level down , the wastewater level <br /> reaches the second stage of the Kari <br /> float switch which energizes the <br /> second pump. <br /> 3 . If both, the first and the second pump <br /> fail to hold the wastewater level down <br /> the water level will reach the third <br /> stage of the Kari float switch which <br /> energizes the alarm. <br /> 7 <br />