The GRACO 557642 is a PTFE (polytetrafluoroethylene) back-up ring designed for use with Trabon Lube Master pump packages. It serves as a critical sealing component within the pump assembly, helping to maintain proper lubrication system integrity by supporting and protecting primary seals from extrusion and wear.

Key Features:

• Back-Up Ring
• -014 PTFE
• PTFE (polytetrafluoroethylene)
• For use with Trabon Lube Master Pump Packages
• High chemical resistance due to PTFE material
• Supports and protects primary seals
• Enhances seal life and system reliability

Applications:
Used in lubrication systems requiring robust sealing solutions, particularly in Trabon Lube Master pump assemblies for industrial lubrication applications.

Installation Notes:

• Using genuine GRACO back-up rings ensures compatibility, optimal performance, and longevity of the lubrication system.
• Ensure the pump is depressurized and isolated before disassembly.
• Inspect the back-up ring for damage or wear before installation.
• Follow the manufacturer’s recommended procedures for seal and back-up ring installation.
• Use appropriate tools to avoid damaging the PTFE ring during installation.
• Regularly inspect seals and back-up rings during routine maintenance.
• Replace back-up rings if signs of wear or damage are present.
• Keep the lubrication system clean to prevent contamination of seals and back-up rings.