The GRACO 108285 U-Cup Packing is a sealing component typically made from durable materials such as leather or synthetic polymers, designed to prevent fluid leakage in reciprocating pump assemblies. It is intended for use within GRACO circulating supply pumps and similar equipment to maintain pressure integrity and ensure reliable operation.

Key Features:

• U-Cup Packing
• Designed for use in GRACO circulating supply pumps and compatible with models requiring U-cup packings for sealing
• Provides effective sealing for reciprocating pump pistons
• Designed for easy replacement and maintenance
• Enhances pump reliability and longevity

Applications:
Used in GRACO circulating supply pumps and similar equipment for sealing piston rods and preventing fluid leakage in high-pressure or high-cycle applications.

Installation Notes:

• Using genuine GRACO U-Cup Packing ensures proper fit, optimal sealing performance, and equipment longevity.
• Clean and inspect all parts before installation
• Apply appropriate grease to the packing and rod for smooth installation and operation
• Ensure the lips of the U-cup packing face the correct direction (typically down into the outlet housing)
• Follow torque specifications for related fasteners (e.g., 20–30 ft-lb for piston studs in similar assemblies)
• Regularly inspect and replace packings as part of routine maintenance to prevent leaks and downtime