Single & Double Mechanical Seals | 50+ Years Expertise

Application Scenarios

Single and Double Mechanical Seals can be used in many different applications, but most commonly, they are used for applications that require control over process stability and leakage, and/or protective measures against any undesirable or hazardous product leaking into the environment.

Double Seals provide a second sealing point, and an intermediate chamber between the two sealing points, allowing for significantly better control over the sealing environment than with a single seal configuration.

Common applications for Double Mechanical Seals include:

• Centrifugal pumps transferring a wide range of industrial liquids, where potential leaks to the atmosphere must either be reduced or monitored by the appropriate Regulatory Agencies.
• Chemical process pumps transferring weakly corrosive, and/or temperature-sensitive products where the seal faces are subject to potential damage from the fluid being pumped.
• Applications that require fluid to circulate as a Buffer/Barrier fluid, to improve heat dissipation from the sealing surface, and enhance seal performance.
• Applications in which a single mechanical seal could not accommodate a wide range of pressure and/or temperature fluctuations.

Most users will compare the required performance of Single Mechanical Seals and the required performance of Double Mechanical Seals based on the Maximum Operating Pressure for each type, and the characteristics of the fluids being pumped through each type of seal, as well as any other Safety Requirements, rather than comparing the cost of each.