Which of the devices listed is used to maintain a snug interface between the rotating and stationary seal members shown in the illustration? GS-0071

Correct Answer: Option A — spring

Mechanical seals rely on a spring to exert constant axial force, ensuring the rotating face maintains intimate contact with the stationary seat. This pressure prevents leakage across the interface despite vibration or wear. Without this spring-loaded tension, the seal faces would separate, leading to immediate fluid bypass and system failure.