Graco 105279 Back-Up Ring

Graco 105279 Back-Up Ring – Premium PTFE Seal Support for High-Pressure Systems

The Graco 105279 Back-Up Ring is an engineered sealing component crafted to ensure extended service life and reliable performance in high-pressure filtration and spray applications. Constructed from advanced PTFE, it supports primary seals, maintains fluid integrity and reduces downtime in demanding working environments.

Key Features

• Material: High-grade PTFE for chemical resistance and low friction
• Function: Supports and protects O-rings in high-pressure filter assemblies
• Design: Precision machined for tight tolerances and consistent performance
• Effectively prevents seal extrusion, especially under cyclic pressure loads
• Ideal for industrial airless sprayer systems and filter housings

Technical Specifications

Performance Benefits

• Enhances seal life by supporting elastomeric O-rings in high-stress environments
• Reduces downtime by maintaining consistent seal performance
• Improves fluid system reliability and reduces risk of leakage or contamination
• Suitable for both solvent-based and waterborne coating systems in industrial use

Installation & Maintenance Advice

• Ensure the filter housing or pump cavity is clean and free of debris before installation
• Seat the back-up ring with proper orientation and alignment to avoid misfit or extrusion
• Apply a light film of compatible lubricant to improve seal run-in and minimize wear
• Inspect the assembly periodically for signs of extrusion, wear or chemical attack and replace as needed

Conclusion

The Graco 105279 Back-Up Ring plays a critical role in high-pressure sealing systems by providing structural support to primary O-rings and preserving system integrity. Its precision engineering and robust material makeup ensure that your airless sprayer or filtration setup remains dependable, reducing maintenance burdens and maintaining optimal finishing results in industrial environments.