What is a common disadvantage of a mechanical seal?

Mechanical seals are commonly used in various applications to prevent leakage of fluids and gases. One reason why higher initial costs can be seen as a disadvantage is due to the complexity and precision engineering involved in their design and manufacture. Compared to other sealing methods, mechanical seals often require more advanced materials, precise tolerances, and intricate designs, all contributing to an increased cost upfront.

While mechanical seals tend to have lower maintenance needs and can provide a more reliable sealing solution over time, the initial investment can deter some operators, especially when simpler alternatives are available at a lower cost. Additionally, the long-term operational savings gained from using mechanical seals can outweigh these initial costs, but it may require a careful evaluation of the overall cost-effectiveness when considering the upfront financial burden.