Advantage
1. Reliable sealing. In the long-term operation, the sealing state is very stable, and the leakage is small. According to rough statistics, the leakage is generally only 1/100 of the soft packing seal;
2. The long service life is generally up to 1 to 2 years or more in oil and water media, and it can usually reach more than half a year in chemical media;
3. The frictional power consumption is small. The frictional power of the mechanical seal is only 10% to 50% of that of the soft packing seal;
4. The shaft or sleeve is basically free from wear;
5. The end face can be automatically compensated after the long maintenance period is worn out. Under normal circumstances, regular maintenance is not required;
6. Good vibration resistance, insensitive to the vibration and deflection of the rotating shaft and the deflection of the shaft to the sealed cavity;
7. A wide range of applications. Mechanical seals can be used for sealing at low temperature, high temperature, vacuum, high pressure, different speeds, as well as various corrosive media and media containing abrasive particles.
8. For the "zero leakage" requirements of many factories, the packing seal cannot meet this requirement; it is basically suitable for a wide range and greater arbitrariness, but for the factory, frequent replacement or maintenance will cause great losses to the factory.
Shortcoming
1. The structure is more complex and requires high manufacturing and processing;
2. Installation and replacement are troublesome, and workers are required to have a certain level of installation technology;
3. It is difficult to deal with accidental accidents;
4. High one-time investment.
