With the progress of science and technology we have more and more can not meet the needs of traditional soft packing seal, instead we adopt mechanical seal.Specific reason has the following several points.

1. Reliable sealing in the long period running, sealing condition is stable, leakage is very small, according to rough statistics, the general is only 1/100 of the soft packing seal leakage;

2. Long service life in oil, water type of media generally can reach 1 ~ 2 years or longer, usually in the chemical medium can reach more than half a year;

3. Low friction power consumption of mechanical seal friction power is only 10% ~ 50% of soft packing seal;

4. The shaft or sleeve basically not affected by friction losses;

5. After the maintenance cycle is long face wear can be automatically compensated, in general, no regular maintenance;

6. Good vibration resistance Of the vibration of the axis of rotation, the deflection and axis deflection is not sensitive for seal chamber;

7. Wide scope of mechanical seals can be used for low temperature, high temperature, vacuum and high pressure, different speed, and all kinds of corrosive medium and containing abrasive medium such as mechanical seal.

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