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Graco 105318 Packing O-Ring

The Graco 105318 Packing O-Ring provides a secure, leak-free seal for Graco Reactor systems, ensuring reliable fluid pressure and smooth performance.

  • OEM Part #105318 – genuine Graco replacement
  • Prevents leaks and maintains pressure consistency
  • Fits multiple Graco Reactor 2 & 3 models
  • Durable construction for long service life

$12.26
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Detailed Overview – Graco 105318 Packing O-Ring

The Graco Packing O-Ring (Part # 105318) is a precision-designed sealing component crafted to maintain fluid integrity and pressure performance in Graco systems. Engineered for durability and compatibility, it ensures a reliable seal that helps prevent leaks, material loss or breakdown in high-duty spray and fluid handling equipment.

Compatible Machines

  • Graco Reactor 2 H-30
  • Graco Reactor 2 H-40
  • Graco Reactor 2 H-50
  • Graco Reactor 2 H-XP3
  • Graco Reactor 2 E-30
  • Graco Reactor 2 E-30i
  • Graco Reactor 3 H-50
  • Graco Reactor 3 H-XP3

If your machine isn’t listed above, verify the correct part by checking the parts breakdown or consulting your equipment distributor.

Key Features

Attribute Details
OEM Part Number 105318
Function Seals fluid interfaces to prevent leaks and ensure system pressure integrity.
Application Used in high-performance spray, foam and coatings systems where reliable sealing is critical.
Quality Original equipment manufacturer (OEM) component from Graco for correct fit and performance.

Installation & Maintenance Tips

Follow these best-practice steps to ensure proper installation and long life:

  • Ensure the system is fully de-pressurized and power is disconnected before service.
  • Inspect sealing surfaces for damage or wear; clean any residue or debris.
  • Apply compatible lubricant or sealant as recommended in the equipment manual.
  • Install the O-ring carefully without twisting, then evenly torque any housing or connection bolts.
  • After installation, perform a controlled test run to verify no leaks and consistent system pressure.

Frequently Asked Questions

This O-ring seals fluid-transfer interfaces within the equipment, maintaining pressure, preventing leaks and protecting downstream components from contamination or loss of material.

Yes — this packing O-ring is an OEM Graco part, designed to meet factory specifications for fit, material and performance.

If you see leaks, reduced pressure, visible surface damage or hardened/deteriorated seal material, replace the O-ring immediately to maintain system integrity.

Using only genuine parts and following recommended maintenance keeps your equipment operating at peak efficiency and helps maximize uptime.

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