VRT3-310A | 4500 PSI 27M Unloader Valve No Handle Body Style

Overview

The VRT3-310A unloader valve is a high-pressure, handle-free variant of the proven VRT3 platform, engineered for stable regulation at 310 bar (approximately 4,500 PSI) with flows up to 10.5 GPM. Designed for OEMs and fleets that set pressure once and lock it in, the compact, no-handle body removes snag points and saves space inside tight skids, enclosed carts, and wall-mount bays. Like all VRT3 unloaders, it automatically diverts flow to bypass the instant the trigger is released—protecting pumps, guns, and hoses from damaging pressure spikes while minimizing heat and water hammer for consistent, day-long performance.

What This Means for Your Rig

If you standardize machine builds and do not want operators altering settings in the field, the VRT3-310A keeps your configuration lean, secure, and predictable. The preset design maintains uniform output across your fleet, shortens training time, and reduces accidental misadjustments—while delivering the high-pressure stability needed for turbo nozzles, long hose runs, and demanding cleaning tools.

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); confirm seal set for hot chemical use
• Connections / Ports: Inlet, Outlet, Bypass — 3/8 in NPT female (National Pipe Thread, US)
• Control: preset regulation, no external handle; black-spring class for high pressure
• Typical Use: trapped-pressure unloader for commercial cold or hot-water systems where pressure is shop-set or PLC-controlled

Build and Materials (Made to Last)

The reinforced VRT3 body and precision valve stack are designed for harsh, high-duty environments. Metal threaded ports support repeatable torque and leak-resistant sealing. The handle-free exterior reduces protrusions and shields the adjustment area in compact frames. Standardized port locations simplify clean plumbing to gauges, reels, and return-to-tank circuits. Shared VRT3 wear parts make preventive maintenance straightforward and cost-efficient across multi-rig fleets.

Benefits and Differentiators (Why Choose This Model)

• Handle-free, preset control: prevents tampering and accidental misadjustment
• Space efficient: minimal profile reduces snag risk in tight skids and cabinets
• High-pressure stability: black-spring regulation maintains output in the 4,500 PSI class
• Smooth bypass behavior: reduces oscillations, heat, and water hammer during trigger cycling
• Service friendly: uses standard VRT3 wear parts and repair procedures
• Fleet consistency: set once, replicate across rigs for uniform operation

Industries and Applications

• OEM builds and compact contractor rigs
• Industrial wash bays and manufacturing facilities
• Commercial fleets and rental yards
• Municipal and public works washdown
• Construction and heavy equipment cleaning
• Agriculture and food equipment washdown (with verified chemical compatibility)

Compatibility and Fit

Plumbing and Orientation

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

Porting

• Inlet, Outlet, Bypass: 3/8 in NPT female (National Pipe Thread, US)
• When adapting to other thread standards, use rated fittings and verify sealing surfaces.

Power Pairing

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

Nozzle and Orifice Guidance

• Select a spray tip orifice that matches pump GPM at target PSI.
• Set pressure with system flowing (trigger open), then secure the preset.
• Turbo nozzles may cause momentary spikes—ensure all components exceed system PSI with margin.

Setup, Service, and Reliability

• Prime with clean water, purge air, and confirm supply before startup.
• Adjust and lock pressure only with flow present to avoid false readings.
• Inspect inlet screens and watch for chatter or creeping pressure as signs of wear.
• Service using VRT3 wear parts on a preventive schedule.
• Maintain proper temperature, chemical compatibility, and water quality to extend seal life.

What Is Included

• VRT3-310A unloader valve (handle-free preset configuration)
• Ports: Inlet, Outlet, Bypass — 3/8 in NPT female
• Basic installation and setup guidance

Notes

• Use the 310 bar (approximately 4,500 PSI) rating in titles and bullets for accuracy.