Graco 15D559 120V Valve Assembly

Graco 15D559 Valve Assembly (120 V) — Detailed Description

The Graco 15D559 is a genuine OEM 120‑volt valve assembly designed to control flow and pressure in Graco texture and airless sprayer systems. This robust assembly integrates the valve mechanism and sensor to ensure reliable operation under frequent use and challenging job‑site conditions.

Key Features & Benefits

• 120 V AC rated design, made to Graco’s OEM specifications for dependable performance.
• Integrated assembly format with valve and sensor—reduces installation complexity and potential leak points.
• Heavy-duty construction suitable for high cycle count and professional spraying environments.
• Precision engineering ensures tight sealing, accurate flow control, and consistent spray output.
• Backed by Graco parts support—allows maintenance teams to replace a critical component without full system overhaul.

Compatibility & Application

This valve assembly is compatible with multiple Graco electric sprayer models that use 120 V systems, particularly in textured and industrial finish operations. It is listed in the parts breakdown for Graco RTX 1500 and similar machines where a 120 V valve assembly including sensor is required.

Technical Specifications

Installation & Maintenance

1. Turn off power to the sprayer and ensure the unit is fully de‑energised before any service.
2. Locate the existing valve assembly in the machine, typically near the pump or control manifold.
3. Remove the old valve assembly by disconnecting electrical and fluid connections, noting orientation and wiring.
4. Install the new 15D559 assembly in the same orientation. Connect wiring and fluid fittings securely.
5. Re‑apply cover or housing as required, restore power, and test the system through normal flow cycles to verify correct operation and absence of leaks.
6. Inspect the valve periodically for signs of wear, leaks, or sensor fault, and replace if required to maintain optimal performance.

Why Replace With the 15D559?

• Replacing with the correct OEM assembly ensures system compatibility and preserves performance warranties.
• An ageing or faulty valve assembly can cause inconsistent spray pressure, fluid leaks, or sensor faults—affecting output quality.
• Using the genuine Graco part streamlines maintenance, avoids custom fitting issues, and reduces downtime in critical sprint jobs.

Frequently Asked Questions