The GRACO 555684 is a Viton O-Ring designed for sealing applications within GRACO industrial equipment. It is specifically engineered for use in high-pressure environments, such as those found in lubrication systems, and is compatible with certain GRACO models like the Manzel® HP-15 High Pressure Lubricator.

Key Features:

• O-Ring
• Inside Diameter: 18.8 mm (0.739 in), Outside Diameter: 22.3 mm (0.879 in)
• Viton (Fluoroelastomer)
• For use with Manzel® Model HP-15 High Pressure Lubricators and other compatible GRACO equipment
• High chemical and temperature resistance due to Viton material
• Reliable sealing performance in demanding environments
• Single-piece construction for easy replacement

Applications:
Used in sealing cylinders and fluid paths within GRACO high-pressure lubrication systems, particularly in industrial and heavy-duty applications.

Installation Notes:

• Using genuine GRACO O-Rings ensures proper fit, seal integrity, and equipment longevity.
• Inspect the O-Ring for damage or defects before installation
• Ensure the sealing surfaces are clean and free of debris
• Lubricate the O-Ring with a compatible lubricant if recommended by the equipment manual
• Avoid twisting or stretching the O-Ring during installation