AR51951 | VS500/310 Regulator Relief Valve, 4500 PSI Max

Overview

The AR AR51951 VS500/310 Reg/Relief Valve | 4,500 PSI Max Rated is a precision-engineered pressure control and safety component designed by Annovi Reverberi. It provides smooth pressure regulation, overpressure protection, and stable operation in high-performance hydraulic and cleaning systems.

Main Benefits

• Maintains precise system pressure for consistent performance
• Automatically protects pumps from dangerous overpressure conditions
• Engineered for industrial, professional, and continuous-use applications
• Rated for up to 4,500 PSI

Heavy-Duty Construction

Built from durable brass with stainless-steel internal components, the AR51951 is designed to withstand harsh environments, vibration, chemicals, and high-pressure workloads.

Construction Features

• Heavy-duty brass housing for strength and corrosion resistance
• Stainless-steel valve seat, spring, and piston for long lifespan
• Precision-machined internals guarantee leak-free, consistent performance
• Designed for extreme operating conditions

Dual Regulator + Relief Valve Function

This unit functions as both a pressure regulator and a safety relief valve, providing two essential controls in one compact device.

How It Works

• Pressure Regulator: Maintains steady output pressure by diverting excess flow through a bypass circuit.
• Relief Valve: Automatically opens if pressure exceeds safe limits to prevent equipment damage.
• Ensures safe, reliable performance in high-pressure cleaning and hydraulic systems.

Adjustable Pressure Control

The top-mounted adjustment screw allows precise pressure tuning for specific pump, nozzle, and application requirements.

Adjustment Advantages

• Easy fine-tuning of system pressure
• Automatically maintains desired pressure level
• Compensates for changes in flow demand

Balanced Piston Design

The internal balanced piston ensures fast response to pressure changes and smooth flow modulation.

Performance Benefits

• Reduces hydraulic shock and water hammer
• Protects seals, plungers, and pump internals
• Low-turbulence flow paths improve efficiency

Integrated Overpressure Protection

If system pressure exceeds the preset limit, the relief circuit opens instantly and reseats automatically once normal conditions return.

Safety Features

• Prevents pump and hose damage
• Eliminates risk during blocked nozzles or closed triggers
• Self-resetting design ensures continuous operation

Easy Installation & Versatile Compatibility

The VS500/310 features standard threaded connections compatible with AR North America pumps and many industrial systems.

Installation Advantages

• Compact design fits stationary or mobile equipment
• Rugged body for harsh environments
• Easy access for inspection and maintenance

Durability & Reliability

Engineered for long service life, even in demanding industrial environments involving chemicals, heat, and detergent-infused water.

Durability Highlights

• Corrosion-resistant materials
• Precision-ground spring maintains calibration accuracy
• Withstands continuous high-pressure operation

Low Maintenance

Minimal maintenance is required to keep the valve performing at its best.

Service Features

• Simple inspection and flushing procedures
• Adjustable screw allows easy recalibration
• Replacement seal kits available
• Modular internal components for quick servicing

Factory Tested for Safety & Performance

Every AR AR51951 VS500/310 valve is factory-tested for pressure stability, relief accuracy, and leak integrity.

Quality Assurance

• High-cycle endurance testing
• Hydraulic performance verification
• Guaranteed compliance with 4,500 PSI rating

Real-World Application Benefits

The AR51951 delivers stable system performance, protects pumps, and minimizes downtime across variable flow conditions.

Ideal For

• Industrial jetting systems
• Commercial pressure washers
• Hydraulic pressure control systems
• High-pressure cleaning and fluid transfer

Summary

The AR AR51951 VS500/310 Reg/Relief Valve provides precision pressure control, essential overpressure protection, and long-term durability. Its dual-function design, heavy-duty construction, and adjustable performance make it a trusted choice for demanding professional applications.