Back-up ring BUR
![Design Sketch](https://products.fst.com/medialibrary/assets/designsketch_bur_9a47d76b9b.png)
Description
- Symmetrical
- Rectangular cross section
- Advantages
- Applications
- Function
- High pressure creep resistance
- High extrusion reliability
- Long service life
Most commonly used in the following applications:
Plant construction
Static sealing of bushes
Static sealing of covers
Switch valves
Vacuum applications
Vacuum pumps
- Extension of the application range of o-rings
- Prevents gap extrusion with radial sealing O-rings