The type ES915 - ES920 is a single pressurized, liquid-lubricated cartridge & Semi-Cartridge assembly mechanical seal are designed for top, bottom & side entry drives equipment where no leakage of highly application or fluids to the environment can be tolerated. Complete pre-assembled tested unit ready for installation. A value-engineered design, high level of standardization and broad material options make this seal a cost-efficient solution for general-duty applications in all process industries. The seal operating limits may differ from the values given in the parameters section. Furthermore, additional monitoring devices may be required.