Hoffman 691 Model Series
The Hoffman 691 series is one of the three model series which are the workhorse of the industry. These cast iron units are rugged and affordable and so diverse that they are used across a broad range of municipal and industrial applications. Wastewater aeration /treatment, aerobic digestion, air scouring and grit chambers are typical municipal applications for these units. Aeration basins. Carbon black, combustion gas, landfill gas, gas boosting, pulp dewatering are some of the few industrial applications for this model series.
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