Graco 158487 Piston Specifications
Compatible Machines
- Graco equipment using valve housing 158331 and plunger‑valve assemblies
- Graco industrial fluid handling systems or spray machines requiring piston 158487
Product Overview
The Graco 158487 Piston is a precision component inside the plunger‑valve assembly designed to regulate fluid flow and pressure.
It works together with the Seat 158483 and Valve 158484 within valve housing 158331 to ensure consistent performance in high-pressure and industrial spray applications.
Key Specifications
| Part Number | 158487 |
| Part Name | Piston |
| Assembly Location | Inside valve housing 158331 of the plunger‑valve module |
| Function | Moves within the valve assembly to open/close fluid paths, regulating pressure and flow |
| Application | Used in Graco spray and industrial fluid handling systems requiring precise valve operation |
Usage Recommendations
- Verify your machine’s parts manual to confirm it requires piston 158487 before ordering.
- Inspect the piston whenever performing valve maintenance. Replace if signs of wear, scoring, or leakage are present.
- Ensure that the surrounding valve components (seat, stem, housing) are in good condition to maintain performance.
- Follow manufacturer’s assembly and torque instructions to prevent damage to the piston or valve housing.
Frequently Asked Questions
The piston moves inside the plunger-valve assembly to regulate fluid flow and pressure, ensuring precise operation of the valve module.
This piston is used in Graco machines that include valve housing 158331 and plunger-valve assemblies. Always check your model’s parts manual for verification.
Inspect the piston during valve maintenance. Replace it if any wear, scoring, or leakage is found to maintain proper valve performance.
