Graco 15B328 Seal Spacer

Graco 15B328 Seal Spacer – Product Details & Compatibility

Compatible Machines

The Graco 15B328 Seal Spacer is used in Graco piston‑pump assemblies where a precise spacer is required between the seal and other internal components.

• Graco Falcon or similar piston pumps that use a seal/spacer stack inside the cylinder. 
• Repair and rebuild kits where the OEM spacer ensures correct internal geometry after seal replacement.
• Graco industrial sprayers or pump modules needing precise tolerances for sealing and alignment.

Product Overview

The Graco 15B328 Seal Spacer is a stainless‑steel (SST) component that positions and supports piston seals in Graco pump cylinders. It ensures correct seal preload and alignment during operation.

Key Features

• OEM stainless‑steel construction for durability and corrosion resistance
• Maintains correct spacing for U‑cup or piston seals
• Helps preserve seal life by ensuring proper sealing geometry
• Enables accurate rebuilds by keeping internal stack tolerances consistent

Technical Specifications

Usage Notes

• Depressurize the pump and remove the piston rod before installing or replacing the seal spacer.
• Always use the OEM 15B328 spacer to maintain correct seal stack height and prevent premature seal wear.
• Inspect the spacer and machined surfaces for wear, corrosion, or deformation during rebuilds.
• After installation, reassemble the pump and perform a leak and pressure test to ensure proper sealing and function.

Frequently Asked Questions