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Graco 158391 Adjusting Screw

The Graco 158391 Adjusting Screw provides precise control over valve settings in Graco spray systems for consistent performance and reliability.

  • Fits: Graco President 10:1 Systems (205-626, 205-627, 205-628)
  • Function: Fine-tunes valve and pressure adjustment
  • Material: Hardened, corrosion-resistant steel
  • Type: Genuine Graco OEM part

$228.48
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Graco 158391 Adjusting Screw – Precision Valve Control Component

The Graco 158391 Adjusting Screw is a precision-engineered OEM part used to fine-tune valve and pressure adjustments in Graco pump systems. It provides stable operation and consistent performance in professional spray equipment.

Compatible Machines

  • Graco President 10:1 Ratio Air Spray System
  • Model 205-626 (Series 0 / H)
  • Model 205-627 (Series 0 / H)
  • Model 205-628 (Series H)

Product Specifications

Specification Details
Part Number 158391
Part Type Adjusting Screw
Function Allows precision control of valve clearance and fluid relief pressure
Material Hardened steel with corrosion-resistant finish
Used In Graco pump and valve assemblies, including Relax-A-Valve systems

Key Features

  • OEM Quality: Genuine Graco replacement ensuring exact fit and durability
  • Precision Design: Enables accurate valve and pressure adjustment
  • Durability: Built to withstand continuous industrial use
  • Easy Maintenance: Simple installation during pump service or rebuild

Frequently Asked Questions

The adjusting screw fine-tunes the valve or relief mechanism in Graco pumps, allowing for precise control of fluid flow and system pressure.

The 158391 Adjusting Screw fits Graco President 10:1 Ratio Air Spray Systems, including models 205-626, 205-627, and 205-628.

This is a genuine OEM Graco part, manufactured to the same specifications as the original component for guaranteed compatibility and performance.

Check your pump’s parts manual for part number 158391 or “Adjusting Screw” in the valve section. If listed, it’s fully compatible. When unsure, consult a Graco parts distributor with your model and serial number.

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