AR51179 | VB60/600 Flow Unloader, 8700 PSI, 16 GPM

AR51179 VB60/600 Flow Unloader Valve – 8700 PSI – 16 GPM

High-Performance Brass Valve for Industrial Pressure Washers

The Annovi Reverberi AR51179 VB60/600 Flow Unloader Valve is a heavy-duty, flow-actuated pressure regulation component built for the most demanding industrial and commercial pressure washing systems. Designed to handle up to 8700 PSI and 16 GPM, this valve offers exceptional pressure control, high flow stability, and unmatched pump protection in high-output environments.

Flow-Actuated Performance for Smoother Operation

Unlike traditional pressure-based unloaders, the VB60/600 uses a flow-sensitive actuation system that responds to water movement rather than pressure spikes. This creates smoother transitions, reduces pressure fluctuations, and enhances system stability—especially beneficial for high-volume or multi-gun pressure washer setups.

When flow drops (such as when a spray trigger is released), the valve immediately diverts water into bypass mode, safeguarding the pump from overheating, cavitation, and damaging overpressure.

Durable Brass Construction

The AR51179 features a solid brass body paired with corrosion-resistant internal components engineered for long-lasting performance. It withstands freshwater, light detergents, and industrial cleaning chemicals, making it ideal for heavy-duty, continuous-use applications across multiple industries.

High-Flow, Multi-Gun System Support

With the capacity to handle up to 16 GPM, this flow unloader valve is suitable for systems where multiple operators work off a single pump. The flow-actuated design ensures each user receives consistent pressure with no performance lag or unstable cycling, making it an excellent fit for wash tunnels, multi-station wash bays, and large-scale contractor rigs.

Serviceability & System Protection

The modular design allows fast maintenance, easier part replacement, and reduced downtime. Its ability to suppress cavitation, dampen vibration, and reduce heat buildup extends the lifespan of pumps, seals, and accessories—dramatically lowering long-term operational costs.

Key Features

• Model: AR51179 – VB60/600 Flow Unloader Valve
• Maximum Pressure: Up to 8700 PSI
• Maximum Flow Rate: Supports systems up to 16 GPM
• Actuation Type: Flow-activated for stable, smooth performance
• Construction: Heavy-duty brass with corrosion-resistant internals
• Bypass Function: Automatic engagement for pump safety
• Adjustability: Fine-tune flow sensitivity for tailored system performance
• Pump Protection: Helps prevent overheating, cavitation, and pressure spikes
• Maintenance: Modular build for quick servicing
• Connections: Standard threaded ports for easy installation

Common Applications

• Hydro blasting and high-pressure jetting systems
• Multi-gun commercial pressure washer installations
• High-volume contractor trailer rigs
• Mining and heavy equipment cleaning
• Agricultural and food processing facilities
• Industrial wash bays and plant maintenance stations
• Logistics hubs and transportation fleet washing
• Large vehicle wash tunnels and sanitation lines

AR51179 VB60/600 Flow Unloader, 8700 PSI, 16 GPM

The AR51179 VB60/600 Flow Unloader Valve is one of the highest-capacity, most durable flow-actuated unloaders available. With exceptional pressure handling, multi-gun compatibility, pump protection, and industrial-grade longevity, it is the ideal choice for professional operators who require top-tier performance and reliability from their pressure washing systems.