VRT3-310-R | 4500 PSI Unloader Valve Assembly Kit Valve

Overview

The VRT3-310-R unloader valve is the retail-packaged version of the proven VRT3 platform, engineered to regulate and protect systems operating at 310 bar (approximately 4,500 PSI) with flows up to 10.5 GPM. Tuned with a high-pressure black spring, it diverts water to bypass the instant the trigger is released, preventing dangerous pressure spikes and protecting pumps, hoses, guns, and accessories. The rugged housing and precision internals deliver consistent performance under frequent cycling, while the retail-ready packaging makes it ideal for distributors, service counters, and contractors needing a dependable, easy-to-install replacement.

What This Means for Your Rig

For operations where uptime and consistency matter, a reliable unloader is essential. The VRT3-310-R stabilizes working pressure across long hose runs, turbo nozzles, and demanding tools. Crews experience smoother operation with less heat, chatter, and seal wear, while managers benefit from reduced downtime thanks to predictable setup and clean bypass transitions.

Performance Specs (Quick Reference)

• Max Pressure: 310 bar (approximately 4,500 PSI)
• Max Flow: up to 10.5 GPM
• Temperature: up to 194°F (90°C) typical for VRT3 class; verify seals for hot chemical use
• Connections / Ports: 3/8 in NPT female (Inlet, Outlet, Bypass)
• Spring / Control: black spring for high-pressure regulation; adjustable internal set point
• Typical Use: trapped-pressure unloader for commercial cold- or hot-water pressure washers

Build & Materials (Made to Last)

The reinforced VRT3 body and precision valve stack are built for long service life in demanding environments. Metal threaded ports allow repeatable torque and secure, leak-resistant sealing. Standard port locations keep plumbing clean when connecting to gauge tees, hose reels, and return-to-tank lines. The high-pressure black spring ensures stable regulation in the 4,500 PSI class, and shared VRT3 wear parts simplify preventive maintenance across fleets.

Benefits & Differentiators (Why Choose This Model)

• Retail-ready replacement: packaged for distributors and service counters
• High-pressure stability from the black spring for consistent cleaning power
• Smooth bypass behavior reduces spikes, water hammer, hose whip, and seal wear
• Fast, repeatable setup across different tips, lances, and hose lengths
• Service friendly: uses common VRT3 wear parts and familiar repair practices
• Clean plumbing with standardized 3/8 in NPT female ports

Industries & Applications

• Contractor replacement parts and mobile wash fleets
• Industrial wash bays and manufacturing plants
• Commercial facilities and maintenance crews
• Municipal and public works equipment washdown
• Construction and rental yards for heavy equipment cleaning
• Agriculture and food equipment washdown with verified chemical compatibility

Compatibility & Fit (Mounting, Plumbing, Nozzles)

• Plumbing & orientation: install downstream of the pump and upstream of the hose or reel. Route bypass to tank when required. Use approved thread sealants and confirm torque.
• Porting standard: 3/8 in NPT female (Inlet, Outlet, Bypass). Use rated adapters if converting to BSP or other threads.
• Power pairing: ideal for triplex pumps up to 10.5 GPM in the 4,000–4,500 PSI range on gas or electric builds. Pair with thermal relief valve, inlet filtration, gauge, and burst-rated hose/wand sets.

Nozzle & Orifice Guidance

• Select a spray tip orifice matching pump GPM at target PSI.
• With water flowing (trigger open), adjust to reach working pressure and lock the setting.
• Turbo nozzles can spike pressure—ensure all components are rated at or above system pressure.

Setup, Service & Reliability

• Prime with clean water, purge air, and confirm supply before first start.
• Adjust pressure only with the trigger pulled for accurate readings.
• Inspect inlet screens regularly and watch for chatter or creeping pressure as signs of wear.
• Service using appropriate VRT3 wear parts on a preventive schedule.
• Maintain temperature, chemical exposure, and water quality within manufacturer limits.

What Is Included

• VRT3-310-R unloader valve (retail-packaged, high-pressure class with black spring)
• Ports: 3/8 in NPT female (Inlet, Outlet, Bypass)
• Basic installation and setup guidance

Notes

• Use the 310 bar (approximately 4,500 PSI) rating in all product titles and bullets.
• List any included adapters or plugs on product pages to ensure installers match threads correctly.