What is the function of teflon backup rings in hydraulic systems?

Teflon backup rings play a crucial role in maintaining seal integrity under pressure within hydraulic systems. These rings are typically placed behind a primary sealing element, such as an O-ring, to provide support and prevent extrusion of the seal material when subjected to high pressures. The Teflon material is chosen for its low friction properties and its ability to withstand high temperatures, which helps maintain the effectiveness of the seal over a range of operational conditions.

By preventing the primary seal from being forced out of its groove during operation, the backup ring ensures a consistent and reliable sealing performance. This is particularly important in hydraulic systems, where leaks can lead to loss of fluid and operational efficiency. The design of backup rings allows them to effectively handle pressure while protecting the sealing components, thereby enhancing the overall reliability and longevity of the hydraulic system.