Although two pumps will likely cost more than a single large pump, the improvements to pumping efficiency without VFDs makes that margin much slimmer because of the cost of the VFD components and the increased power draw every time the large pump runs.Įfficiency in a duplex configuration applies to more than just power consumption and meeting multiple flow scenarios. One pump can be used to handle the daily flow requirements, and if the peak flow is ever experienced, both pumps can be used to reach that pumping rate.

This is the basic concept of a duplex pump configuration. The other option is to meet the peak flow with two pumps. Electrical controls with variable frequency drives, or VFDs, could increase the efficiency to some degree, but this would add cost and complexity. If only one pump was used, the pump would need to be very large to meet the peak flow requirements, and it would be extremely inefficient at pumping the lower, “daily” flow requirements. 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. Can easily be adapted to 1-1/4' PVC pipe or any other material required by local codes.ħ.8 gpm at 80 psig Recommended Alarm PanelĪdditional alarm panel options are available, including remote monitoring.Romtec Utilities designs, engineers, manufactures, and supplies all types of pumping systems for a wide variety of applications. Other inlet configurations available.ĭischarge Connections: Pump discharge terminates in 1-1/4' NPT female thread. Inlet Connections: 4' inlet grommet standard for DWV pipe. Outdoor stations accommodate depths from 102 inches to 160 inches (see drawings, above).Į/One requires the installation of its stainless steel UNI-LATERAL to prevent backflow from the sewer system from entering the grinder pump station. Stations are available for indoor and outdoor installations. The DH502/DR502 can accommodate flows of 6000 gallons per day.

A single DH502/DR502 can be used for nine average, single-family homes, and up to 24 homes where codes allow and with consent of the factory. The tank is made from tough, corrosion-resistant FRP and provides 500 gallons of capacity. The DR502 is the “radio frequency identification” (RFID), or “wireless,” model that uses wireless technology to communicate between the level controls and the motor controls.The DH502 is the “hardwired,” or “wired,” model where a cable connects the motor controls to the level controls through watertight penetrations.The grinder pumps use integrated level-sensing pressure switches instead of floats - the 'core'-style pump is compact and easily removed for service if needed. The DH502/DR502 grinder pump station consists of two pumps and a tank with a dry accessway. Drawings & Installation InstructionsĭH502/DR502 Installation Instructions (PDF, 2 mb) This model was previously known as the Model GP 2016. Grinder pumps collect wastewater from the building and send it to the central sewer and/or treatment system through small-diameter pipes. The E/One model DH502/DR502 duplex (2 pumps) grinder pump station is an ideal choice for multiple single-family homes and light commercial applications. Prefault Monitor for Air Cooled Generatorsĭ-Series | DH502 & DR502 Grinder Pump Station.Condition Monitoring for Turbine Generators.Condition Monitors Warn of Impending Failure.Low Pressure Sewer System Replaces Septic System In Lake Community.Grinder Pump Driven Pressure Sewer Systems.Design Assistant Installation Instructions.

Duplex sewage ejector pump system