Graco 103185 O-Ring Packing

Function & Fitment Guide for Graco 103185 Packing O-Ring

Compatible Machines / Assemblies

• High-Pressure Color Change Valve – Model 832503 (Series B)
• High-Pressure Dump Valve – Model 947994 (Series B)
• Color Change Manifolds – Models 907345–907350 (when equipped with valve 832503)

What is the Graco 103185 Packing O-Ring?

The 103185 O-Ring is an OEM polyurethane sealing ring used on the valve needle inside specific Graco high-pressure valves. It prevents fluid bypass along the needle, helping maintain system pressure and leak-free operation in color-change and dump-valve applications.

Key Features

• OEM genuine part for precise fit and durability.
• Polyurethane material designed for high-pressure coating systems.
• Critical seal for valve needle performance in 832503 and 947994.
• Ideal for preventative maintenance and valve rebuilds.

Product Specifications

Installation & Maintenance Notes

• Follow full system pressure-relief procedures before disassembly.
• Lightly lubricate the new O-ring and seat it in the needle groove without twisting.
• Inspect the backup ring, valve needle, seat, and housings; replace worn parts.
• After reassembly, perform a low-pressure leak check, then ramp to operating pressure.

Fitment Verification Tips

• Confirm your system uses valve 832503 or 947994 (Series B) or a manifold listed above.
• Match the O-ring callout (103185) in your unit’s parts diagram or service manual.

Frequently Asked Questions