AR VRT3-310 Unloader Valve with Pressure Switch 4500 PSI – OEM Replacement Part

Part Number: UNVRT3310S
Category: Pressure Washer Components → Unloader Valves → Annovi Reverberi (AR) Pump Parts
Type: AR VRT3-310 Unloader Valve with Integrated Pressure Switch

The AR UNVRT3310S VRT3-310 Unloader Valve is a genuine OEM pressure-actuated unloader featuring a factory-mounted pressure switch installed in the bypass port. Designed for commercial and industrial pressure washer systems, this combination unloader and pressure switch assembly provides reliable pressure regulation, pump protection, and automated control functionality in a single compact unit.

Key Features & Benefits

• Genuine Annovi Reverberi (AR) OEM Replacement Part
• VRT3-310 unloader with factory-mounted pressure switch
• Rated for pressures up to 4500 PSI
• Supports flow rates up to 8 GPM
• Integrated pressure switch simplifies system installation
• Helps automate burner, motor, and control circuit operation
• Provides reliable pressure regulation and bypass protection
• Durable forged brass valve construction
• OEM-quality fit, performance, and reliability
• Ideal for commercial and industrial pressure washer systems

Technical Specifications

Manufacturer: Annovi Reverberi (AR)

Part Number: UNVRT3310S

Product Type: Unloader Valve with Pressure Switch

Maximum Pressure: 4500 PSI

Maximum Flow Rate: 8 GPM

Maximum Pressure Switch Rating: 3625 PSI

Pressure Switch Type: Micro Switch

Electrical Rating: 5 Amp / 250 Volt

Maximum Fluid Temperature: 194°F

Valve Body Material: Brass

OEM Replacement: Yes

Port Configuration

Inlet Port:

• 3/8" FPT

Outlet Port:

• 3/8" FPT

Bypass Port:

• 3/8" FPT

Port Type:

• Female Pipe Thread (FPT)

Typical Applications

• Hot water pressure washers
• Commercial pressure washer systems
• Industrial cleaning equipment
• Pressure washer burner control systems
• Automatic pressure washer shutoff systems
• Fleet washing equipment
• Agricultural cleaning systems
• Custom pressure washer builds

Performance Advantages

• Combines pressure regulation and switch control into one assembly
• Helps automate pressure washer system operation
• Maintains consistent operating pressure
• Protects pumps from excessive pressure buildup
• Supports smooth bypass operation when the trigger gun is released
• Reduces installation complexity and component count
• Durable brass construction provides long service life
• OEM-quality components ensure dependable performance
• Ideal for professional pressure washing applications