While designing for a peak flow requirement makes sense, it is, by definition, in extreme excess of the daily flow rates a lift station must pump. This design requirement is to prevent ever experiencing an overflow scenario. In wastewater and sewer applications, the “peak flow” needs to be able to be pumped by the lift station even if it never happens. This requirement is something called “peaking factor,” and it describes the maximum flow rate that could potentially ever need to be pumped. The efficiency reasons have to do with a typical design requirement for pumping wastewater. The best answer is that there are efficiency and redundancy reasons for using two pumps over one. The first question you might have about a duplex pump station is why two pumps are necessary. Duplex configurations are often the best engineering solution for wastewater applications. Pump stations can also be designed as simplex, triplex, and up to pentaplex configurations, all depending on how many pumps are required to meet the flow requirements. A duplex configuration means that there are two pumps in the system. The duplex pump configuration is one of the most common configurations in a pump station design, and it provides owners with several benefits. Romtec Utilities designs, engineers, manufactures, and supplies all types of pumping systems for a wide variety of applications.
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