Flange tri-clamp mount mixers are available as portable entry, fixed entry, closed tank mixer seals, and variable speed drives types. It is a non-pressure, direct drive mixer. Its drum lid mounting or closed top mounting on vessels to 800 gallons and have the capability of mixing viscosities up to 5,000 centipoise in 55 gallon vessels, where lighter viscosities in larger vessels. It has dual opposing propellers that provides efficient liquid turnover.