Chapter 8—ENVIRONMENTAL POLLUTIONto permit removal of foreign objects which mayjam or plug the comminutor. The components ofthe comminutor-type system, shown in figure 8-5,include:1. The CHT tank. The capacity of eachtank usually is more than 2000 gallons.2. The CHT pump set; one pump set per tank.A pump set consists of two motor-driven pumps,two suction plug or ball valves, two discharge plugor ball valves, two discharge check valves (withhold-open device), a pump controller, a high levelalarm, and an appropriate number of liquid levelsensors.Figure 8-5.—Comminutor type CHT system.8-15
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