Which of the following is an advantage of mechanical seals over packing for centrifugal pumps?

Mechanical seals are recognized for their durability and performance in various applications, particularly in centrifugal pumps. One of the notable advantages is their ability to maintain functionality without requiring frequent maintenance, which can lead to extended lifespans, often lasting several years, such as 3 to 4 years, before any significant maintenance is necessary. This longevity contributes to reduced downtime and maintenance costs, making mechanical seals a more efficient choice.

In contrast to packing, which may require regular adjustments and replacements to prevent leaks, mechanical seals maintain a tighter seal over time, thus minimizing the risk of leakage and increasing reliability. This allows for more consistent operation of the pump, directly benefiting operational efficiency and reducing the overall total cost of ownership for centrifugal pumps.