1,Reliable seal ,over a long period of use ,it will not leakage or few leakage.
2,Have a long time useful life, if choose the right material and pressure of seal face can use 2-5years ,the longest is 9years.
3,Minimum maintenance ,it doesn't need to maintain in normal working conditions.
4,Less consumption friction power
5,Shaft or sleeve is not affected by wear .
6,Wide range of application ,can use in low temperature \high temperature\high vacuum ,high pressure, various speeds and various corrosion ,flammable, explosive ,toxic media seal.
1,One –time investment is higher.
2,Structure is more complex, high requirement for manufactory produce.
3, Installing and replacing are much trouble, require the works have a certain level for install.
4,When a fortuitous event occurs ,it's difficult handle with .