What are the advantages of mechanical seals for melt pumps compared to packing seals?

The common shaft sealing methods for melt pumps include spiral sealing, packing sealing, mechanical sealing, and combination sealing; In addition to conventional packing sealing, mechanical sealing is also a commonly used sealing method. The company can provide multiple sealing methods to meet the different needs of users for material sealing process flow. Below is a specific explanation of the advantages of mechanical seals compared to packing seals.

1. Mechanical seals have a wide range of applications. It can be used for working conditions such as low temperature, high temperature, vacuum, high pressure, different rotational speeds, as well as various corrosive and abrasive media.

2. The sealing state is stable and the leakage rate is small, and the allowable leakage rate under experimental conditions is only 1/100 of that of soft fillers.

3. The friction power of mechanical seals is only 10% to 50% of that of soft packing seals, resulting in a significant reduction in energy consumption.

4. Due to the transfer of friction surfaces, the shaft or sleeve is basically not subject to wear, greatly extending the service life of the pump shaft.

5. Long lifespan. It can generally be used normally for 1-2 years or longer in oil and water media, and can also be used normally for more than half a year in industries such as smelting, petrochemical, and papermaking with complex working conditions.

6. After installation, the machine seal can achieve automatic compensation based on its operating conditions, eliminating the need for frequent maintenance and reducing labor intensity.

7. For the "zero leakage" requirements of special industries, packing seals cannot meet the requirements, while mechanical seals can. Moreover, it avoids frequent replacement of packing materials and reduces maintenance costs.

In summary, compared to traditional packing seals, mechanical seals have many advantages: good sealing performance, stable performance, small leakage, low friction power consumption, long service life, etc. However, their structure is relatively complex, requires high manufacturing accuracy, high cost, and large one-time investment. Therefore, each sealing method has its advantages and disadvantages. In our daily applications, we choose a sealing scheme that is suitable for our own working conditions.

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