VRT3-310D | 4500 PSI 27M Unloader Valve Black Spring Control

VRT3-310D | 4500 PSI 27M Unloader Valve Black Spring Control

The VRT3-310D unloader valve is a heavy-duty, VRT3-series regulator engineered for stable control at 310 bar (approximately 4,500 PSI) with flows up to 10.5 GPM. Tuned with a black spring for high-pressure stability, it automatically diverts water to bypass the instant the trigger is released, protecting pumps, hoses, guns, and accessories from damaging pressure spikes. Rugged construction and a service-friendly design deliver reliable performance under continuous cycling in contractor rigs, industrial facilities, and high-duty wash stations.

WHAT THIS MEANS FOR YOUR RIG

When you run higher pressures and longer hose lengths, the unloader becomes the backbone of safety and performance. The VRT3-310D’s high-pressure spring class provides the headroom needed for turbo nozzles and demanding tools, while its smooth bypass behavior reduces heat, water hammer, chatter, and seal wear. Operators get a cleaner, more consistent wash experience, and fleets see fewer avoidable downtime events.

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 family
• Connections / Ports: 3/8 in NPT female (Inlet, Outlet, Bypass)
• Spring and Control: black spring for high-pressure regulation; adjustable internal set point
• Typical Use: trapped-pressure unloader for commercial cold- or hot-water systems

BUILD AND MATERIALS (MADE TO LAST)

A reinforced VRT3 body and precision valve stack are designed for long service life in harsh environments. Metal threaded ports support repeatable torque and leak-resistant sealing, while the compact form factor fits neatly into skids, enclosed carts, and wall-mount bays. Standardized port locations simplify clean plumbing with gauge tees, hose reels, and return-to-tank layouts. Common VRT3 wear parts keep preventive maintenance predictable and affordable across fleets.

BENEFITS AND DIFFERENTIATORS (WHY CHOOSE THIS MODEL)

• High-pressure stability: black-spring class maintains set pressure in the 4,500 PSI range
• Smooth bypass behavior: reduces pressure oscillations, heat buildup, hose whip, and seal wear
• Faster setup and training: predictable adjustments and consistent feel across multiple rigs
• Service friendly: shared VRT3 wear parts and familiar repair practices
• Flexible plumbing: standardized 3/8 in NPT-female ports
• Proven platform: widely used by OEMs, fleets, and pro contractors for uptime

INDUSTRIES AND APPLICATIONS

• Industrial cleaning facilities and manufacturing plants
• Contractor rigs and mobile wash fleets
• Commercial fleets and rental yards
• Municipal and public works equipment washdown
• Construction and heavy equipment cleaning
• Agriculture and food equipment washdown (verify chemical compatibility)

COMPATIBILITY AND FIT (MOUNTING, PLUMBING, NOZZLES)

Plumbing and Orientation

• Install downstream of the pump and upstream of the hose or reel.
• Route bypass back to tank when recirculation is required.
• Use thread sealants approved for high-pressure water.
• Verify torque on metal fittings.

Porting Standard

• Inlet, Outlet, Bypass: 3/8 in NPT female
• For other thread types, use rated adapters and confirm sealing surfaces.

Power Pairing

• Ideal for triplex pumps up to 10.5 GPM in the 4,000–4,500 PSI range.
• Use with thermal relief valve, inlet filtration, regulator and gauge, and burst-rated hose/wand assemblies.

Nozzle and Orifice Guidance

• Select a spray tip orifice matching pump GPM at target PSI.
• Adjust pressure only with water flowing (trigger open).
• Turbo nozzles may spike pressure; ensure every component is rated appropriately.

SETUP, SERVICE, AND RELIABILITY

• Prime with clean water and purge air before first start.
• Adjust pressure only with the trigger pulled.
• Inspect inlet screens regularly.
• Monitor for chatter or creeping pressure as signs of wear.
• Service with proper VRT3 wear parts on a preventive schedule.
• Keep temperature, chemistry, and water quality within manufacturer limits.

VRT3-310D WHAT IS INCLUDED

• VRT3-310D unloader valve with high-pressure black spring
• 3/8 in NPT female ports (Inlet, Outlet, Bypass)
• Basic installation and setup guidance

VRT3-310D | 4500 PSI 27M Unloader Valve Black Spring Control

• Use the 310 bar (approximately 4,500 PSI) rating in titles and bullets.
• Standardize catalog entries to 3/8 in NPT female for all VRT3 ports.
• List any included adapters so installers can match threads on first visit.