AR51107 | VB200/150 Unloader Valve, Brass

AR51107 – VB200/150 Unloader Valve – Brass – NPT Connections – High-Pressure System Protection

Overview

The Annovi Reverberi AR51107 VB200/150 unloader valve is a premium component engineered for high-performance pressure washer systems requiring reliable pressure control, automatic bypass functionality, and long-term durability. Built with heavy-duty brass and precision-machined internals, this valve is designed for daily commercial or industrial use, protecting pumps and extending equipment life in demanding environments.

Reliable Pressure Regulation & System Protection

The VB200/150 acts as both a pressure regulator and an automatic bypass valve. When the spray trigger is released, it instantly redirects water flow into a bypass circuit, preventing hazardous pressure spikes that can damage pumps, seals, hoses, and accessories. This ensures smooth cycling and consistent system performance, even during long cleaning sessions or high-pressure operation.

Its precision-engineered internals reduce vibration, water hammer, and system strain—resulting in cooler, quieter, and more reliable operation. This helps extend pump life and reduce maintenance costs across the entire pressure washer system.

Durable Brass Construction with NPT Connections

The valve’s solid brass body offers excellent corrosion resistance and long-term durability, even in harsh environments. Standard NPT-threaded inlets and outlets provide broad compatibility with North American commercial pressure washer systems, ensuring fast installation and leak-free integration for contractors, technicians, and OEM manufacturers.

Applications & Performance

Ideal for medium- to high-pressure systems, the AR51107 is commonly used in extended runtime applications including fleet washing, industrial cleaning, agricultural equipment maintenance, and construction site cleanup. Its rugged design performs reliably in outdoor environments with vibration, heat, dust, and water exposure.

Key Features

• Valve Type: VB200/150 unloader valve
• Connections: NPT-threaded inlet/outlet for universal compatibility
• Operation: Automatic bypass engages when trigger is released
• Material: Heavy-duty brass body with corrosion-resistant finish
• Internals: Precision-machined components for smooth transitions
• Pressure Rating: Suitable for medium- to high-pressure systems
• Pump Protection: Prevents overheating, pressure spikes, and premature wear

Use Cases

• Professional contractor pressure washer systems
• Mobile fleet washing and service trucks
• Agricultural machinery and equipment washing
• Construction site cleanup and equipment maintenance
• Industrial wash stations and facility sanitation systems

Summary

The AR51107 – VB200/150 Unloader Valve offers unmatched protection, reliability, and long-term performance for commercial and industrial pressure washer systems. With durable brass construction, NPT connectivity, and smooth bypass operation, it provides dependable pressure control and pump protection in the toughest working conditions.