Backup Rings
Prevent O-Ring Extrusion in High-Pressure Applications
Backup rings are rigid sealing components used alongside O-rings to prevent extrusion into the clearance gap between mating surfaces. They are commonly used in hydraulic, pneumatic, and high-pressure sealing applications where standard O-rings alone may not provide adequate performance.
Performance Seals supplies backup rings in a variety of materials, sizes, and configurations to support demanding sealing environments.
What Is a Backup Ring?
A backup ring is installed next to an O-ring to provide support under pressure. By reducing the risk of extrusion, backup rings help extend seal life and improve reliability.
Common Benefits
- Prevents O-ring extrusion
- Improves high-pressure performance
- Extends seal life
- Reduces maintenance and downtime
- Supports larger clearance gaps
Available Configurations
- Solid Backup Rings
- Split Backup Rings
- Spiral Backup Rings
- PTFE Backup Rings
- PEEK Backup Rings
- Custom Sizes and Materials
Frequently Asked Questions
When is a backup ring needed?
Backup rings are typically used when pressure levels or clearance gaps create a risk of O-ring extrusion.
Can backup rings be used on both sides of an O-ring?
Yes. In applications with pressure from either direction, backup rings may be installed on both sides of the O-ring.
What material is best for a backup ring?
PTFE is commonly used, while PEEK is often selected for higher pressures and more demanding applications.
Do backup rings provide the seal?
No. The O-ring provides the seal. The backup ring supports the O-ring and helps prevent extrusion.