A wide range of mechanical seals are offered by leak-proof engineering . These mechanical seals are used manufactures a wide range of mechanical seals for hydraulic applications. Non-cartridge seals, 80u/85u series , come with the ffollowing features are provided by non-cartridge seals, 80u/85u series:i shaft diameter- dl: 14... 100 mm- pressure-p: l0 bar[max]: temperature -1: -23...16ul; and unbalanced. This series find some applications in: petrochemicals; petroleum refinery: general chemicals: and light hydrocarbons.