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Graco 331027 Ball .250 GR100 SS 440

Graco 331027 Ball .250 GR100 SS 440 is a precision stainless-steel check ball used in Graco pump and valve assemblies to ensure reliable one-way fluid control and consistent pressure performance.

  • 0.250 inch diameter precision ball
  • Manufactured from 440-grade stainless steel
  • Designed for check valve and sealing applications
  • High wear and corrosion resistance
  • OEM Graco replacement part

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Compatible Machines

Graco 331027 Ball .250 GR100 SS 440 is an internal precision component. It is commonly used in Graco fluid-handling equipment that utilises a 1/4 inch stainless-steel check ball within valve or pump assemblies. Based on typical applications, this part is found in:

  • Graco airless paint sprayer pump assemblies
  • Graco fluid pump check valve assemblies
  • Graco displacement pump inlet and outlet valves
  • Selected Graco line striping and coating pump systems

Final compatibility depends on the specific pump or valve design. Always verify using the equipment parts manual or exploded diagram for your exact Graco model.

Product Description

The Graco 331027 Ball .250 GR100 SS 440 is a high-precision stainless-steel ball designed for use in Graco valve and pump systems. With a diameter of 0.250 inch, this component plays a critical role in one-way fluid control by sealing against a valve seat to prevent backflow.

Manufactured from hardened 440-grade stainless steel, it offers excellent wear resistance, corrosion resistance, and long service life, even in demanding coating and fluid transfer applications.

Technical Specifications

Graco Part Number 331027
Ball Diameter 0.250 inch
Material 440 Stainless Steel
Grade GR100
Function Check valve / sealing ball
Application Fluid pumps and valve assemblies

Frequently Asked Questions

This ball acts as a sealing and check component inside valves and pumps, allowing fluid to flow in one direction while preventing reverse flow that could reduce pressure or performance.

No. This is a size-specific internal component. It only fits Graco models designed to use a 0.250 inch stainless-steel check ball. Always confirm compatibility using the official parts breakdown.

440 stainless steel provides high hardness, excellent wear resistance, and strong corrosion protection, making it ideal for high-pressure and high-cycle fluid applications.

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