VR56-250M | Unloader Valve, 3626 PSI, 3/8 NPT M-M

VR56-250M – Unloader Valve – 3,626 PSI – 3/8″ NPT Male Threads

The Annovi Reverberi VR56-250M is a commercial-grade unloader valve designed to deliver stable, safe, and long-lasting pressure regulation for professional cleaning systems. Rated for 250 BAR (≈3,626 PSI), this model features dual 3/8″ NPT male ports that make it easy to install securely across a variety of system layouts. Engineered for heavy-duty commercial rigs, contractor fleets, and industrial maintenance programs, the VR56-250M combines rugged durability, streamlined plumbing, and precise regulation in one dependable component.

By automatically diverting water into bypass mode when spray flow stops, this valve helps protect pumps, hoses, and fittings from dangerous overpressure spikes. With a regulation profile tuned for smooth stability during throttle changes and frequent trigger cycling, the VR56-250M reduces surge/lag behavior that can otherwise accelerate pump wear and shorten service life.

Advanced Pressure Regulation

Unloader valves are critical for system safety and pump longevity. The VR56-250M is built to maintain consistent operating pressure while safeguarding pumps under demanding daily use. Its bypass system activates instantly when the trigger is released, redirecting water to prevent heat buildup, seal wear, and overpressure damage.

• Smooth Pressure Response – Reduces surges and pressure lag when cycling the spray trigger on and off.
• Thermal Protection – Diverts flow to keep pump water temperatures stable during idle or bypass periods.
• Shock Reduction – Minimizes stress on seals, bearings, and check valves, extending overall system lifespan.

Construction & Design

The VR56-250M is built to thrive in demanding environments, combining robust materials with a compact footprint that fits easily into commercial and contractor-grade systems.

• Connections – Dual 3/8″ NPT male ports simplify plumbing and reduce the need for extra fittings and adapters.
• Housing – Rugged body designed to withstand vibration, impact, and high-cycle use in mobile and stationary systems.
• Internals – Precision-machined components ensure stable bypass operation across thousands of pressure cycles.
• Compact Profile – Fits efficiently into tight system layouts without sacrificing durability or performance.
• Service-Friendly – Straightforward disassembly and access for maintenance helps minimize downtime in the field.

Applications

The VR56-250M supports a wide range of commercial and industrial cleaning systems where reliable pressure control and pump protection are essential:

• Industrial Cleaners – Stable regulation for plant floors, warehouses, and manufacturing facilities.
• Contractor Trailers – Reliable pressure control for mobile wash crews working job-to-job.
• Facility Maintenance Programs – Dependable performance in schools, municipal buildings, and large commercial complexes.
• Rental Fleets – Rugged enough for frequent equipment turnover and high-cycle operation.
• Agricultural Equipment Washing – Protects pumps used to clean tractors, sprayers, and heavy farm machinery.

Key Features & Applications

• Pressure Rating: 250 BAR (≈3,626 PSI).
• Connections: Dual 3/8″ NPT male ports for simplified, secure plumbing.
• Function: Automatic bypass for pump longevity and system protection.
• Construction: Rugged housing and durable internals for heavy-cycle operation.
• Applications: Industrial cleaners, contractor trailers, facility maintenance programs, rental fleets, agricultural wash systems.

Benefits for Operators

• Pump Longevity – Protects seals, bearings, and valves from premature wear due to overpressure and heat.
• Operator Safety – Prevents pressure spikes that can damage hoses and create hazardous working conditions.
• Ease of Installation – Dual NPT male connections reduce adapters, leak points, and setup time.
• Smooth Operation – Tuned stability profile reduces surge and lag during throttle and trigger cycling.
• Compact & Practical – Fits into tight system layouts without compromising strength or durability.
• Proven Reliability – Built by Annovi Reverberi, trusted worldwide for professional-grade pump and control components.

Summary

The Annovi Reverberi VR56-250M is a medium-to-heavy duty unloader valve rated for 250 BAR (≈3,626 PSI), built with dual 3/8″ NPT male ports for streamlined installation and secure system integration. Its tuned regulation profile minimizes surge and lag, ensuring smooth transitions during high-frequency trigger use while protecting pumps from harmful overpressure.

With its rugged housing, compact footprint, and service-friendly layout, the VR56-250M delivers long-lasting reliability in industrial cleaning setups, contractor fleets, rental equipment, and facility maintenance systems. Professionals choose this valve for its balance of durability, stability, and ease of plumbing—making it a go-to solution for commercial-duty high-pressure cleaning.