VRT100-330DK | 4800 PSI 1/2 NPT Dual-Port Unloader Valve Control

VRT100-330DK | 4800 PSI 1/2 NPT Dual-Port Unloader Valve Control

• The VRT100-330DK is a high-pressure, dual-port unloader valve
  engineered for stable regulation at 4,800 PSI (330 bar).
• Tuned with a blue spring for precise, repeatable adjustments in
  high-pressure applications.
• Diverts flow to bypass the instant the trigger is released,
  protecting pumps, hoses, guns, and accessories from pressure spikes and heat
  buildup.
• Two primary 1/2 in NPT female ports simplify complex plumbing
  layouts by accommodating gauges, reels, chemical loops, or auxiliary circuits
  without extra manifolds.
• Built for continuous duty in demanding environments, delivering
  smooth regulation, cleaner installs, and long service life for contractors and
  industrial operators.

What This Means for Your Rig

• Designed for the 4,800 PSI class, where a stable unloader is
  critical to keeping pressure locked at your setpoint across different tips,
  lances, and long hose runs.
• Dual-port design reduces the need for tees and add-on
  manifolds, cutting leak points and installation time.
• Operators get a steadier trigger feel with less chatter and
  hose whip, improving comfort and control.
• Managers see fewer nuisance trip-outs, quicker service, and
  consistent performance across a fleet of machines.

Performance Specs (Quick Reference)

• Max Pressure: 4,800 PSI (330 bar)
• Flow Capacity: Match to pump GPM for best results (size
  nozzle and system to operating point).
• Temperature: Up to 194°F (90°C) typical;
  confirm seal kit for hot-water or chemical use.
• Ports / Connections:
  • Dual primary: 1/2 in NPT female
  • Bypass return: 1/2 in NPT female
  • All ports are NPT (National Pipe Thread, U.S.).
• Spring / Control: Blue spring for the 330-bar class with
  adjustable set pressure.
• VRT100-330DK Function: Trapped-pressure unloader with automatic bypass
  when the trigger is released.

Build & Materials VRT100-330DK (Made to Last)

• Reinforced housing and precision valve stack provide smooth
  modulation and minimal pressure oscillation under vibration and frequent
  cycling.
• High-rate spring supports stable high-pressure regulation in
  demanding 4,800 PSI-duty applications.
• Metal 1/2 in NPT-female ports support repeatable torque and
  leak-resistant sealing with appropriate thread sealants.
• Dual-port layout reduces auxiliary fittings and simplifies
  routing to gauges, hose reels, chemical loops, or return-to-tank lines.
• Serviceable wear parts and clear access points make
  preventive maintenance straightforward for shop techs and field crews.

Benefits & Differentiators VRT100-330DK (Why Choose This Model)

• Dual-port flexibility: Integrate gauges, accessories, or
  secondary circuits without extra manifolds or tees.
• High-pressure stability: Blue-spring regulation holds a steady
  setpoint in the 4,800 PSI class.
• Pump and hose protection: Instant bypass limits heat buildup,
  water hammer, and seal wear during idle periods.
• Cleaner plumbing: Fewer fittings and joints mean fewer leak
  risks and faster installation.
• U.S.-standard integration: 1/2 in NPT-female ports match
  common fittings, reels, and accessories.
• Lower lifetime cost: Durable internals and widely available
  VRT100 wear parts support long service intervals and predictable maintenance.

Industries & Applications

• Contractor rigs and mobile wash trucks
• Industrial cleaning lines and plant wash bays
• Commercial facilities and fleet wash stations
• Municipal / public works equipment washdown systems
• Construction and heavy equipment cleaning
• Agriculture and food equipment washdown (with verified
  chemical and seal compatibility)

Compatibility & Fit VRT100-330DK (Mounting, Plumbing, Nozzles)

• Plumbing & orientation: Install downstream of the pump
  and upstream of the hose or reel. Route the bypass back to tank when your
  system requires recirculation.
• Use thread sealants approved for high-pressure water service
  and verify torque on all metal fittings.
• Porting standard: Dual primary 1/2 in NPT female plus 1/2 in
  NPT female bypass. For BSP or quick-connect systems, use rated adapters and
  confirm sealing surfaces and flow path.
• Power pairing: Ideal with triplex pumps
  configured for working pressures up to 4,800 PSI. Include thermal relief,
  inlet filtration, a test-gauge tee, and burst-rated hose and wand assemblies.
• Nozzle / orifice guidance:
  • Choose a spray tip orifice that matches your pump GPM at target PSI;
    correct orifice sizing is essential for stable regulation.
  • With water flowing (trigger open), adjust the unloader to reach working
    pressure, then secure the setting per your SOP.
  • Turbo nozzles can create momentary spikes; ensure every component—
    unloader, hose, gun, lance, and fittings—is rated at or above system
    pressure with safety margin.

Setup, Service & Reliability

• Startup: Prime with clean water, purge air, and verify supply
  before first start.
• Adjustment: Adjust pressure only with the trigger pulled to
  avoid false readings and accidental over-pressure.
• Inspection: Inspect inlet screens and strainers regularly;
  watch for chatter or creeping pressure as indicators of wear or contamination.
• Preventive service: Service on a scheduled basis using the
  appropriate VRT100 wear parts for your duty cycle.
• Operating limits: Keep temperature, water quality, and
  chemistry within manufacturer limits to maximize seal life and overall system
  efficiency.

What’s Included

• VRT100-330DK unloader valve with dual 1/2 in NPT-female
  primary ports (blue-spring, 330-bar class).
• Bypass return: 1/2 in NPT female connection for tank return
  or recirculation.
• Basic installation and setup guidance from the manufacturer
  or distributor.

VRT100-330DK | 4800 PSI 1/2 NPT Dual-Port Unloader Valve Control

• List any included adapters, plugs, or gauges on your product
  page so installers can match threads and fittings on the first visit.
• For hot-water or chemical service, confirm the seal kit,
  material compatibility, and temperature limits for your specific application
  before commissioning.