Graco 105277 Back-Up Ring
The Graco 105277 Back-Up Ring is a genuine PTFE seal support designed for high-pressure Graco sprayers and filters. It ensures leak-free performance and longer seal life.
- Part Number: 105277
- Material: PTFE (Teflon)
- Pressure Rating: Up to 3000 psi
- Compatible With: Graco King, Merkur, and President Series
- Function: Prevents O-ring extrusion under pressure
Graco 105277 Back-Up Ring – High-Pressure PTFE Seal Support
Graco 105277 Back-Up Ring is a precision-engineered PTFE support ring that enhances seal reliability in high-pressure airless sprayers. Designed for durability and chemical resistance, it prevents O-ring extrusion and ensures consistent performance under extreme pressure cycles.
Compatible Machines
- Graco High Pressure Filters (Model 244067, 244068, 244069)
- Graco Merkur ES Spray Packages
- Graco King Airless Sprayer Series
- Graco President and Senator Pumps
- Graco AirPro and G40 Spray Guns
Key Features
- Material: Virgin PTFE (Teflon) for superior chemical resistance
- Pressure Rating: Up to 3000 psi (210 bar)
- Temperature Range: -30°C to 150°C
- Prevents seal extrusion in high-pressure assemblies
- Enhances pump efficiency and seal longevity
- OEM genuine Graco replacement part
Technical Specifications
| Property | Specification |
|---|---|
| Part Number | 105277 |
| Material | PTFE (Teflon) |
| Operating Pressure | Up to 3000 psi (210 bar) |
| Temperature Range | -30°C to 150°C |
| Function | Prevents O-ring extrusion under high pressure |
| Applications | Airless Sprayers, Filtration Systems, Piston Pumps |
Benefits
- Increases service life of Graco sprayers
- Minimizes downtime and leakage
- Simple installation and maintenance
- Compatible with solvent-based and high-solids coatings
Maintenance Tips
- Inspect backup and O-rings every 500 hours of operation.
- Replace when visible deformation or wear appears.
- Use compatible solvent cleaners; avoid abrasives.
- Ensure proper torque when reassembling filter housings.
Frequently Asked Questions
Conclusion
The Graco 105277 Back-Up Ring delivers reliability and performance for Graco airless sprayers and filtration assemblies. Its PTFE composition, high-pressure tolerance, and precision design make it an indispensable component for professional finishing systems seeking longer seal life and minimized maintenance downtime.
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