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Graco 158484 Plunger Valve

The Graco 158484 Plunger Valve provides reliable flow control and pressure stability for Graco spray and fluid handling systems. Designed for durability and smooth operation in demanding environments.

  • Part Number: 158484
  • Type: Valve, Plunger
  • Compatible With: Graco Seat 158483 & Stem 158482
  • Application: Pressure control, paint spraying, fluid regulation
  • Material: Hardened stainless steel

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Graco 158484 Plunger Valve Overview

Compatible Machines

  • Graco Automatic Pressure Control Systems
  • Graco Industrial Fluid Handling Equipment
  • Graco Paint Sprayers using Plunger Valve Assembly 158482 / 158483
  • Graco Hydraulic and Pneumatic Valve Modules with Housing 158331

Product Overview

The Graco 158484 Plunger Valve delivers precise fluid regulation for high-pressure spray and coating systems. Engineered with a hardened plunger and corrosion-resistant housing, it ensures smooth flow control and extended service life in demanding industrial applications.

This valve pairs with Seat 158483 and Stem 158482 to form a complete plunger valve assembly, providing leak-free sealing and stable pressure performance. Designed for reliability under continuous operation, it is ideal for professional coatings, fluid transfer, and airless sprayer systems.

Key Specifications

Part Number 158484
Part Name Valve, Plunger
Material Stainless Steel Body with Hardened Plunger
Working Pressure Up to 3000 PSI
Primary Function Regulates fluid flow and maintains consistent outlet pressure in high-demand spray systems.
Assembly Compatibility Compatible with Graco Seat 158483 and Stem 158482 assemblies.

Usage Recommendations

  • Confirm the valve assembly number in your Graco parts manual before installation.
  • Replace if fluid leakage, poor pressure regulation, or sluggish response occurs.
  • Inspect the plunger and seat assembly regularly for wear or pitting.
  • Lubricate seals with compatible hydraulic oil during assembly to extend life.

Frequently Asked Questions

It acts as the moving element inside the valve assembly that opens and closes against the Valve Seat 158483 to control pressure and fluid flow in Graco pumping systems.

It fits Graco automatic pressure control systems, industrial paint sprayers, and fluid-handling assemblies that use housing 158331 and seat 158483. Always verify compatibility in your model’s official Graco parts list before purchase.

Under normal use, inspect every 500–1000 operating hours. Replace the valve if it shows wear, corrosion, or reduced pressure control performance.

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