Cartridge mounted mechanically balanced seals, manufactured in accordance with API 682 standards. These seals are designed for heavy duty plications and/or applications which are dangerous to both people and surrounding a......Cartridge mounted mechanically balanced seals, manufactured in accordance with API 682 standards. These seals are designed for heavy duty plications and/or applications which are dangerous to both people and surrounding atmosphere. They offer the best performance possible in terms of reliability and gaseous emission control, making them the ideal solution for petrochemical plants. They are available as single or double seal construction in the various versions required by API Standards. The metallic bellows designs are particularly suited to high temperature and/or corrosive liquids.