Graco 158485 Flat Gasket Overview
Compatible Machines
- Graco automatic pressure‑control valve assemblies (Housing 158331 series)
- Graco industrial fluid‑handling equipment using plunger valve modules (Seat 158483 / Valve 158484)
Product Overview
The Graco 158485 Flat Gasket is a precision‑cut sealing ring (typically copper) designed to fit between key valve housing components to ensure a tight seal and prevent fluid or pressure leakage.
It is used in valve assemblies alongside Seat 158483 and Valve 158484, providing a critical interface for maintaining reliable operation in high‑pressure and industrial coating systems.
Key Specifications
| Part Number | 158485 |
| Description | Flat Gasket (copper sealing ring) |
| Used With | Valve housing 158331, Seat 158483, Valve 158484 |
| Application | Seals mating surfaces in plunger‑valve modules to prevent leakage |
| Product Type | Wear/spare part for industrial spray/pressure systems |
Usage Recommendations
- Always check your machine’s parts manual to verify the valve housing uses gasket 158485 before ordering.
- Replace the gasket if you observe any fluid leakage or pressure drop around the valve assembly.
- Ensure mating surfaces are clean and undamaged before installing the new gasket to maximize sealing performance.
- Use the correct torque and follow the manufacturer’s procedure during assembly to avoid damage to the flat gasket or valve housing.
Frequently Asked Questions
The gasket forms a flat sealing surface between the valve housing and plunger valve module components. It prevents fluid or pressure leakage and ensures stable operation under high pressure.
It is used in Graco machines that use the specific plunger‑valve assembly housing (158331) in industrial fluid handling or spray systems. Always confirm with your model’s parts list.
The gasket should be inspected whenever performing valve service. Replace it any time you disassemble the valve module or discover signs of wear, embedding, corrosion, or leakage.
