The Graco 800655 Valve Unloader 2500 PSI is a genuine OEM pressure-regulating valve designed to protect pump systems by controlling and releasing excess pressure during operation.
The Graco 800655 Valve Unloader 2500 PSI is used in pressure-regulated pumping and pressure washer systems that require a 2500 PSI unloader valve. It is typically installed inside compatible Graco pressure washer or fluid pump assemblies designed for similar pressure ratings.
The Graco 800655 Valve Unloader 2500 PSI is a genuine replacement component designed to regulate pressure within high-pressure pump systems. An unloader valve plays a critical role in maintaining stable operating pressure by redirecting fluid flow when the spray gun or outlet is closed.
When the system reaches its maximum pressure level, the valve automatically diverts flow back to the pump inlet or bypass line. This helps prevent pressure spikes that could damage the pump, hoses, or other system components.
Manufactured to meet Graco’s durability standards, this valve is designed for reliable operation in demanding environments such as industrial cleaning, pressure washing, and fluid transfer systems.
| Feature | Details |
|---|---|
| Part Number | 800655 |
| Product Type | Valve Unloader |
| Maximum Pressure Rating | 2500 PSI |
| Brand | Graco |
| Function | Controls pressure and redirects flow to protect the pump system |
| Application | Pressure washer and fluid pump assemblies |
A 2500 PSI unloader valve regulates the pressure produced by the pump. When the spray trigger or outlet valve is closed, pressure builds rapidly inside the system. The unloader valve senses this pressure increase and diverts the flow of fluid back to the pump or bypass circuit.
This process protects the pump and other system components from excessive pressure and overheating. It also ensures smooth system operation by maintaining stable pressure levels during use.
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