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209M Flexible Impeller Pump

 209M Close-coupled models feature high quality, bronze construction for maximum corrosion resistance and extended life. Rubber impellers are either directly attached to the stainless steel motor shaft or the impeller is mounted on a separate stainless steel shaft, which is counter bored on the outer end in order to slide over the carbon steel motor shaft. Ball or sleeve bearings in the motor serve as a support for the shaft. Impellers are made of neoprene rubber while nitrile impellers are an option for different applications. 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. Flow may be throttled or shut off for a short period of time without the need for a relief valve.