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SECTION - 2 EQUALIZATION TANKS <br /> ynw...n•wY. (u...r.wa c!-.Jo) �J� rw sij wr.,r.d Vti•1 <br /> RIIw/J/m nnz.� <br /> F.I.. YF f�..a•.. Dill M/I I/f s <br /> nln.a...u..q <br /> .r r1f <br /> sel P•••••4 Ce•^t.,�•fJd l•••.,Y <br /> Tank Tcnk rN.wlGwot .ys�:a_-or.de) <br /> h 9 <br /> a <br /> .I�III i rs< <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. s . 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 />