Boerger Rotary Lobe Pumps are self-priming, valveless positive displacement pumps ideal for use in the wastewater industry. There are 17 pump models in six series with flow rates up to 5,000 usgpm. The screw rotor enables pulsation-free and smooth flow patterns; reversible flow by switching the rotation direction. Boerger Pumps are constructed following our MIP (Maintenance in Place) Design criteria.