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201M Flexible Impeller Pump

201M models are constructed of high quality bronze with stainless steel grade 303 shafts for maximum corrosion resistance. Top of the line models have ball bearings and mechanical seals while others have bronze or carbon bearings and lip type seals. Impellers are typically made of neoprene rubber with nitrile impellers as an option. Flexible blades on the periphery of the impeller provides the pumping action. Impellers rotate the liquid between the blades which is continuously squeezed out into the discharge port by a machined cam located inside the pump chamber.