The main purpose of mechanical seals is to:

Mechanical seals are predominantly used to control water leakage from the stuffing box in various applications, including pumps and mixers. When a pump operates, it often creates a pressure differential that can lead to leakage around the shaft. The mechanical seal is designed to maintain a tight barrier, ensuring that any water or fluid within the stuffing box does not escape, while also preventing external contaminants from entering the system.

By effectively sealing the shaft and minimizing leakage, mechanical seals help maintain system integrity and efficiency, contributing directly to the operational performance and longevity of equipment. This is crucial because excessive leakage can lead to reduced performance, increased wear on components, and potential damage to the environment or surrounding equipment.

While keeping lubrication in and dirt out, preventing contamination, and reducing costs associated with maintenance are important aspects of overall operational efficiency, the primary function of mechanical seals centers around controlling leakage, which is essential to protecting both the equipment and the processes it serves.