Graco 24K859 Large Air Valve Seal Kit

Graco 24K859 KIT SEAL AIR VALVE LARGE

Compatible Machines / Pump Models

• Air valve seal kit for Graco Husky 3300 Air‑Operated Diaphragm Pumps
• Fits large air valve seal configurations in Husky 3300 pumps
• Used when air valve seals are worn or leaking
• Part of routine maintenance and reliability restoration

Product Overview

The Graco 24K859 KIT SEAL AIR VALVE LARGE is a replacement seal kit designed for the air valve assembly of Graco Husky 3300 series diaphragm pumps. When internal air valve seals degrade, this kit provides new O‑rings, piston u‑cups, and gaskets to restore airtight operation and improve pump efficiency.

Key Benefits

• Restores internal air valve seal integrity.
• Improves cycling efficiency and air usage.
• OEM parts for correct fit and long service life.
• Helps reduce leaks and inefficient operation.

Installation & Tips

• Depressurize and drain pump before seal service.
• Clean valve cavity prior to installing new seals.
• Apply recommended grease to O‑rings during install.
• Inspect other valve components for wear while servicing.
• Run pump post‑service to confirm restored performance.

Always check your pump’s repair manual and configuration before ordering replacement parts.