OBERDORFER 209M Macerator Impeler Pump - Head Only
Part Number: 209M
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Close-coupled Flexible Impeller Pumps are made of high quality bronze for maximum corrosion resistance.
The rubber impeller is 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 support the shaft. Model 406M has a mechanical seal. Impellers are made of Neoprene rubber, Nitrile impellers are available on request. Flexible blades on the periphery of the impeller provide the pumping action. While the impeller rotates, the liquid between the blades is continuously squeezed out into the discharge port by a cam located inside the pumping chamber. The flow may be throttled or shut off for a short period without the need of a relief valve.
Liquids compatible with neoprene can be pumped including fresh and salt water solutions and mild chemicals. Do not pump severe solvents or acids. When possible, flush pump with fresh water after each usage. Nitrile impellers can handle oil contaminated water and kerosene at reduced impeller service life. Extremes of cold and heat will affect impeller life. Limits of 40°F to 140°F should be observed. Do not allow liquid in pump to freeze. Drain pump by loosening cover screws. Use methyl alcohol based anti-freeze compounds such as Zerex, Shell Zone, Pyro Permanent, Permagard, Dowgard.
Suction lift of 15 feet is possible when pump remains primed (2.5 feet when suction line is empty). Suction lines must be air tight in order for pump to self prime. A foot valve at beginning of suction line is recommended.