Graco 105278 Packing O-Ring

Graco 105278 Packing O-Ring – Durable Seal for High-Pressure Pump Systems

The Graco 105278 Packing O-Ring is a genuine, precision-molded sealing component designed to maintain pressure integrity in professional-grade airless sprayers and pump systems. Built from high-quality elastomer materials, it ensures long-lasting protection against fluid leakage and performance loss under heavy-duty operation.

Compatible Machines

• Graco King Airless Sprayers
• Graco Merkur ES Packages
• Graco President and Senator Pumps
• Graco High Pressure Filter Assemblies

Key Features

• Material: High-grade Nitrile or Viton® elastomer for chemical resistance
• Function: Provides a tight, reliable seal in high-pressure systems
• Design: Precisely machined profile for balanced load distribution
• Maintains optimal sealing even with temperature or pressure fluctuations
• Extends service life of packing assemblies and pump components

Technical Specifications

Performance Advantages

• Prevents fluid leakage and air intrusion under load
• Improves pump pressure consistency and atomization quality
• Reduces seal wear and system vibration
• Compatible with both solvent-based and waterborne materials

Installation & Maintenance

• Clean sealing surfaces before installation to ensure proper fit
• Lightly lubricate with compatible grease for smoother assembly
• Inspect the O-ring regularly for cracks, flattening, or chemical degradation
• Replace as part of regular pump maintenance for consistent performance

Frequently Asked Questions

Conclusion

The Graco 105278 Packing O-Ring is a small but vital part of high-pressure pump assemblies. Its durable elastomer design ensures strong sealing performance, extending the lifespan of your sprayer and maintaining consistent operation in even the most demanding coating environments.