What is the PRIMARY reason to use a mechanical seal?

• A. Lower maintenance costs
• B. Higher turbidity fluid
• C. Minimal initial cost
• D. Slow shaft speed

Answer: (A)

Mechanical seals are meant to keep process fluid from leaking along a rotating shaft in pumps and similar equipment. The main advantage they offer is dramatically reducing leakage and the maintenance required to control it. Unlike packing that needs frequent tightening, adjustment, and replacement, a properly functioning mechanical seal provides a durable, reliable barrier with less ongoing maintenance. That combination—less leakage, fewer shutdowns, and lower upkeep costs—drives the decision to use a mechanical seal. They’re not typically chosen for being cheaper upfront, nor specifically because of shaft speed or turbidity of the fluid.