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 C — spring

Mechanical seals rely on a spring to maintain constant axial pressure between the rotating and stationary faces. This force ensures the seal faces remain in intimate contact, preventing leakage despite minor shaft runout or thermal expansion, which is essential for maintaining the integrity of pump shaft sealing systems.