Type MSI-B801 design are basically used as dry running seals and can be used for corrosive services.The Advantage of these Seals are that it does not require any lubricant or Quenching for cooling. These seals are use for mixers, agitators and reactors for clean ability. These seals were developed for sanitary applications where product contamination from barrier fluids is unacceptable.Hence this Seals are used.