VRT3-310EZD | 4500 PSI Unloader Valve EZ Start Design Valve

VRT3-310EZD – Unloader Valve – 4,500 PSI – EZ Start – Up to 10.5 GPM

Overview

The VRT3-310EZD unloader valve delivers extreme-duty regulation with EZ Start convenience for
systems operating at 310 bar (≈ 4,500 PSI) and up to 10.5 GPM. During ignition,
EZ Start temporarily lowers system pressure so engines and motors come to speed smoothly, helping protect pump
seals, couplers, and drive components. In daily use, the valve automatically diverts flow to bypass the instant
the trigger is released, minimizing heat, chatter, and water hammer so operators get stable, repeatable working
pressure across long hose runs and demanding tools. The reinforced D-series construction is built for continuous,
high-cycle environments where uptime and safety are non-negotiable.

What This Means for Your Rig

• Reduces start-up strain on engines and motors, cutting nuisance trip-outs and hard starts.
• Provides a consistent trigger feel across multiple rigs and bays for easier training and operation.
• Minimizes heat, chatter, and water hammer, extending seal and pump life in continuous-duty use.
• Helps managers see fewer avoidable downtime events thanks to smooth bypass behavior and predictable adjustments.

Performance Specs (Quick Reference)

• Max Pressure: 310 bar (≈ 4,500 PSI)
• Max Flow: up to 10.5 GPM
• Temperature: up to 194 °F (90 °C) typical for VRT3 class; confirm seal set for hot chemical use
• Connections / Ports: Inlet, Outlet, Bypass – 3/8 in NPT female (National Pipe Thread, US)
• Control: adjustable regulation with high-pressure spring class; EZ Start assists during ignition
• Typical Use: trapped-pressure unloader for commercial cold- or hot-water systems in continuous-duty service

Build & Materials (Made to Last)

• Reinforced VRT3 architecture for extreme-duty cycles in contractor and industrial environments.
• Precision valve stack and metal threaded ports support repeatable torque and leak-resistant sealing.
• Compact body fits skids, enclosed carts, and wall-mount bays without crowding the plumbing.
• Standardized port locations simplify clean routing to gauge tees, hose reels, and return-to-tank layouts.
• Common VRT3 wear parts and established service procedures keep preventive maintenance straightforward and cost-effective.

Benefits & Differentiators (Why Choose This Model)

• EZ Start technology lowers start-up load so engines and motors reach speed smoothly.
• Extreme-duty build with reinforced body and internals for continuous high-cycle operation.
• High-pressure stability holds set pressure in the 4,500 PSI class for long hose runs and demanding tools.
• Smooth bypass behavior reduces pressure spikes, heat buildup, hose whip, and seal wear when the trigger cycles.
• Fleet-friendly design with shared VRT3 parts and familiar repair workflows across multiple rigs.
• Clean installs using 3/8 in NPT-female ports that reduce adapters and potential leak points.

Industries & Applications

• Contractor-grade rigs and mobile wash fleets in continuous service.
• Industrial cleaning facilities and plant wash bays.
• Commercial fleets and rental yards running long hose lengths.
• Municipal and public works equipment washdown.
• Construction and heavy equipment cleaning.
• Agriculture and food equipment washdown (where chemical compatibility is verified).

Compatibility & Fit (Mounting, Plumbing, Nozzles)

• Plumbing & orientation: install downstream of the pump and upstream of the hose or reel. Route bypass
  back to tank when your system requires recirculation. Use thread sealants approved for high-pressure water service
  and verify torque on metal fittings.
• Porting standard: Inlet, Outlet, Bypass are 3/8 in NPT female (National Pipe Thread, US). If adapting
  to BSP or other thread standards, use rated adapters and confirm sealing surfaces and flow path.
• Power pairing: ideal for triplex pumps delivering up to 10.5 GPM in the 4,000–4,500 PSI range on
  gas-engine or electric builds. Include a thermal relief valve, inlet filtration, regulator and gauge, and
  burst-rated hose and wand assemblies.
• Nozzle & orifice guidance:
  • Select a spray tip orifice that matches pump GPM at target PSI; correct orifice is essential for stable pressure and unloader performance.
  • With water flowing (trigger open), adjust to reach working pressure, then secure the setting per your SOP.
  • Turbo nozzles can create momentary spikes; ensure every component, including the unloader, is rated at or above system pressure with margin.

Setup, Service & Reliability

• Prime with clean water, purge air, and confirm supply flow before first start.
• Verify EZ Start behavior during commissioning and include it in routine checks.
• Adjust pressure only with the trigger pulled to avoid false readings and over-pressure.
• Inspect inlet screens regularly and monitor for chatter or creeping pressure as indicators of wear or contamination.
• Service using the appropriate VRT3 wear parts on a preventive schedule to maintain performance.
• Keep temperature, chemical exposure, and water quality within manufacturer limits to maximize seal life and efficiency.

What’s Included

• VRT3-310EZD unloader valve with EZ Start assistance (high-pressure class).
• Ports: Inlet, Outlet, Bypass – all 3/8 in NPT female (National Pipe Thread, US).
• Basic installation and setup guidance.

Notes

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