To ensure that the seals will meet these requirements, Xylem has chosen to design and manufacture its own Flygt seals. As these seals are designed solely for use in submersibles, there is no need for compromise, and seals can be fully optimized for this single purpose.

Flygt Plug-in Seals feature two independent mechanical seals ounted in a single ready-to-install unit. Simply place the Plug-in Seal into position, no special service tools are required. Intelligent design protects sensitive sealing surfaces and springs from impurities, which contributes to enhanced sealing reliability, less downtime and reduced maintenance costs. Plug-in Seals with Active Seal have laser-cut spiral grooves in the seal face of the inner seal that pump liquid from the inner to the outer diameter of the seal ring, thus preventing liquid from entering the stator housing.