Graco 117391 Packing U-Cup

Graco 117391 U-Cup Packing Overview

Compatible Machines

Product Highlights

The Graco 117391 Packing U-Cup provides precision wear resistance and sealing performance in demanding spray applications. Designed for Graco piston pumps, this U-Cup ensures consistent operation under extreme pressure and prevents leaks, delivering reliable durability for professional coatings jobs.

• Durable U-Cup seal designed for longevity in high-pressure environments
• Compatible with Graco piston pumps and airless sprayer equipment
• Optimizes flow and supports professional coatings with high-pressure filtration

Design & Material Features

• U-profile sealing lips engineered for low radial load and high dynamic stability
• Composite elastomer/PTFE construction for chemical compatibility
• Precision tolerances for repeatable installation in standard 0.030" to 0.045" gland widths

Performance & Applications

The 117391 U-Cup excels in maintaining leak-free operation under high-viscosity fluids, abrasive materials, and industrial coatings. It is suitable for:

• High-pressure paint circulation
• Hydraulic intensifiers
• Metering pumps and pneumatic actuators
• Chemical processing, oil & gas exploration, and automotive painting systems

Installation & Maintenance

• Ensure housings are free of scoring with chamfered entry angles
• Apply a thin film of compatible lubricant before assembly
• Maintain radial clearance of 0.002" to 0.003"
• Inspect regularly for extrusion, lip deformation, or flashing

Frequently Asked Questions