In a mechanical seal, which component typically remains stationary?

In a mechanical seal, the component that typically remains stationary is the spring. The spring's main function is to maintain the pressure between the sealing surfaces, ensuring that the sealing ring and the rotating ring are held together tightly enough to prevent leakage. When the pump is in operation, the rotating ring spins with the shaft, while the sealing ring, which is often fixed to the pump casing, does not move. This configuration allows the mechanical seal to function effectively, providing a reliable barrier against fluid leaks, while the spring compensates for wear and maintains contact between the sealing surfaces.

The sealing ring and rotating ring work together to form the actual seal, while the pump casing acts as a housing that keeps the entire assembly in place. The role of the spring is essential because its tension helps adjust for any minor misalignments or wear over time, making it a crucial component of the mechanical seal system.