Double seal for glass lined reactor type 521/d & 521/d/b mechanical seals is intended for top access pathways in glass lined vessel. Affordable space-saving ink cartridge engineered sealing solution for glass lined vessel. This seal is uniquely crafted for every category of mixed and pressurized liquids in containers with top access stirrers that are absent leakage of highly acidic The unit is crafted to handle gases or liquids released into the environment. It arrives fully assembled ready for, And tested quick installation. These seals are crafted to suit premium solid seal surfaces and resulting in, Fixed seats minimal distortion of seal faces under compressive loads together with includes a, Thermal pressure balance pusher feature seals which gives better performance in and Ideal for creating seals in various environments, Double seals perform exceptionally well during low RPM operations vacuum and pressure. The the design can be implemented without incorporating bearings type 521/d or featuring an integrated design bearing 521/d/b . Various elastomers is available for multiple liquid applications. These seals designed with cooling water jacket which ensure cool running of seals. Materialsseal The ring features carbon and sicseat materials faces ceramic and sicelastomer viton, Ttv, Fepmoc Stainless steel 316, Modification of material upon request