Mecline VR54 Unloader Valve 8 GPM 2900 PSI – OEM Replacement Part

Part Number: VR54
Category: Pressure Washer Components → Unloader Valves → Annovi Reverberi (AR) Pump Parts
Type: AR VR54 Pressure-Actuated Unloader Valve

The AR VR54 Unloader Valve is a genuine OEM pressure-actuated unloader designed for commercial and industrial pressure washer systems requiring reliable pressure regulation and bypass protection. Rated for flow rates up to 8 GPM and operating pressures up to 2900 PSI, the VR54 delivers smooth pressure control while helping protect pumps and system components from excessive pressure buildup.

Key Features & Benefits

• Genuine Annovi Reverberi (AR) OEM Replacement Part
• Pressure-actuated unloader valve design
• Direct replacement for AR MV520
• Supports flow rates up to 8 GPM
• Rated for pressures up to 2900 PSI
• Hexagonal check valve promotes smoother flow
• Reinforced valve body for increased durability
• Integrated wrench grip simplifies installation and servicing
• Fully removable pressure regulating assembly for easy maintenance
• Ergonomic adjustment knob for precise pressure control

Technical Specifications

Manufacturer: Annovi Reverberi (AR)

Part Number: 4072000041

Model: VR54

Product Type: Pressure-Actuated Unloader Valve

Maximum Flow Rate: 8 GPM

Maximum Pressure: 2900 PSI

Maximum Temperature: 194°F

OEM Replacement: Yes

Replaces: AR MV520

Repair Kit Compatibility: Same repair kits used for MV520 and MV540

Port Configuration

Inlet Port:

• 3/8" MPT

Discharge Port:

• 3/8" MPT

Bypass Port:

• 3/8" FPT

Typical Applications

• Commercial pressure washers
• Industrial cleaning equipment
• Fleet washing systems
• Agricultural cleaning systems
• Contractor pressure washer rigs
• Equipment wash bays
• Mobile pressure washing trailers
• Replacement for MV520-equipped systems

Performance Advantages

• Provides reliable pressure regulation and bypass control
• Helps protect pumps from excessive pressure buildup
• Promotes smoother flow with upgraded hexagonal check valve design
• Reinforced body improves durability in demanding environments
• Easy-to-service pressure regulating assembly reduces maintenance time
• Ergonomic adjustment system simplifies pressure tuning
• Compatible with existing MV520/MV540 repair kits
• OEM-quality construction ensures dependable long-term performance
• Ideal for commercial and industrial pressure washing systems

Maintenance Recommendations

• Inspect the unloader valve regularly for leaks, pressure fluctuations, or bypass issues.
• Verify pressure settings during routine maintenance intervals.
• Inspect seals, springs, and check valve components for wear.
• Flush contaminants from the system to minimize internal valve wear.
• Rebuild the valve using OEM repair kits when performance declines.
• Use only genuine AR OEM replacement parts to maintain factory performance and reliability.